2.5.1 Basics of the Screw Compressor
The screw compressor is a positive displacement rotary compressor. As shown in Figure 2-3 Compressor Mechanism, the refrigerant (gas) is continuously compressed by changing the volume between the casing and the male and female meshed screw rotors, which have different profiles. The rotor with 4 protruding lobe sections is called the M rotor (male rotor), and the rotor with 6 lobe depressions is called the F rotor (female rotor). Throughout this manual they are referred to as the M rotor and F rotor. The compressor M rotor shaft is driven by the two-pole or four-pole motor via the speed increaser gear.

2.5.2 Suction Process
As shown in Figure 2-4 Suction Process, the rotors’ different profiles mesh together. Also the volume enclosed between the M and F rotor lobes and compressor casing increases from the suction side as the rotors turn. As rotations continue, at a certain point the volume reaches its maximum, the rotors start to trap the gas between the lobes and compressor casing thereby isolating the gas from the suction port.

Figure 2-4 Suction Process
2202L5JE-DA-C5-N_2015.05.2 Compressor Specifications and Structure Compound 2-stage Screw Compressor 2.5 Mechanisms 1612LSC Speed Increaser Type 2-7

2.5.3 Compression Process
As the rotors further rotate, the sealing line between them moves toward the discharge side and the volume between the rotor lobes decreases and compresses the trapped gas. Figure 2-5 Compression Process Figure 2-6 Discharge Process

2.5.4 Discharge Process
Through the compression process, the volume between rotor lobes decreases to a predetermined value at the discharge port. Following rotor rotation, the compressed refrigerant gas is pushed out of the discharge port.

2.5.5 About Volume Ratio (Vi)
Volume ratios (Vi) of C-series screw compressors are indicated in performance tables or catalogs by using port symbols L and M. The volume ratio represented by each symbol is as follows: L=2.63, M=3.65.
Which volume ratio (L or M) should be used is decided according to operating conditions. If the compressor is used with a volume ratio that does not match operating conditions, operation will go inefficiently wasting the power. The relationship between volume ratios and generally used compression ratios is as follows: (Vi) κ= πi = Pd/Ps κ= Cp/Cv of refrigerant gas Vi = designed volume ratio πi = designed compression ratio The constant of the refrigerant gas also a factor, and the Vi value for the compression ratio will change according to the refrigerant gas used.

Figure 2-7 Volume Ratio Explanation
2202L5JE-DA-C5-N_2015.05.2 Compressor Specifications and Structure Compound 2-stage Screw Compressor 2.5 Mechanisms 1612LSC Speed Increaser Type 2-8
(A) When Vi matches operation conditions The required compression ratio and Vi are both low The required compression ratio and Vi are both high
(B) When Vi does not match operation conditions Vi is too low compared to the required compression ratio Vi is too high compared to the required compression ratio Figure 2-8 Relationship between volume ratio (Vi) and operation conditions 2202L5JE-DA-C5-N_2015.05.2 Compressor Specifications and Structure Compound 2-stage Screw Compressor 2.5 Mechanisms 1612LSC Speed Increaser Type 2-9

2.5.6 Capacity Control Mechanism
The capacity control structure involves the moving of a slide valve, bypassing suction gas just before compression on the suction side, which shortens the portion of the rotor used for compression. The slide valve is at the bottom of the casing where the rotors mesh together, and is constructed to move parallel to the rotor’s axis. This movement is changed by a cam mechanism into rotation movement, and as the position (capacity control ratio) is indicated externally, the electrical resistance value changes to provide feedback to the automatic control circuit.

Figure 2-9 Capacity Control Mechanism
The 1612LSC speed increaser type has capacity control on the low-stage block only. 2.5.7 Bearings and Balance Piston For the load created on the rotor perpendicular to the axle, a white metal-lined sleeve-type bearing is used. The bearing uses surface fitted ball bearings with angular contact for loads along the axis direction. In particular, axial load for the M rotor, which has one type of helical gear, is comparatively larger than that of the F rotor because of the thrust load from discharge pressure. This load for the M rotor is reduced by the use of a thrust bearing, along with a balance piston providing opposing hydraulic pressure.

2.5.8 Shaft Seal
To prevent refrigerant gas and oil leakage, a reliable mechanical seal assembly is used for the shaft seal of the speed increaser gear spindle. Mechanical seal assembly is mainly composed of "rotating ring" installed on the rotor shaft and "stationary ring" installed in the seal cover. Rotating ring rotates with the shaft, and slides each other with the stationary ring while maintaining a micron class gap. The sliding each other place is called as the sliding surface. As an example, for the BBSE (Balanced Bellows Single Seal)-type, which is a standard seal currently in use, the fixed ring (mating ring) is cast iron, and the rotating ring is carbon, with an O-ring for the packing.

Figure 2-10 Slide Valve in the
Rotor Casing 2202L5JE-DA-C5-N_2015.05. 2 Compressor Specifications and Structure Compound 2-stage Screw Compressor 2.6 Gas and Oil Flow 1612LSC Speed Increaser Type 2-10 2.6 Gas and Oil Flow The screw compressor’s compression process is described earlier in this manual. Gas for the compound speed increaser type 1612LSC compressor passes from the evaporator and through the suction strainer and check valve, and is sucked into the center part of the compressor ①, and it is compressed at the low-stage ② .Then the compressed gas is discharged at ③. ③ and ④ are connected by piping through which gas used for super cooling is mixed in from the liquid cooler. Lubricating oil injected at the low-stage is, while kept mixed with gas, suctioned from ④ into the high-stage. After being compressed at ⑤, the gas mixed with lubricating oil is discharged from ⑥ to the oil separator, and then sent to the condenser. The oil is cooled even without intermediate gas cooling, so the high-stage discharge temperature can be maintained at below 90 °C. Oil Supply Route Lubricating oil is split into 4 flows as shown in Figure 2-12, and after providing lubrication, it is mixed with discharge gas and leaves the compressor. In standard configurations, oil injection is not performed at the high-stage.

5.2 Maintenance and Inspection List

5.2.1 Daily Management
As daily management, check the items listed in Table 5-1 "Daily Inspection Items" and record the results. Logging these operation data on a daily basis aid in finding out any abnormal conditions of the
compressor. This is significantly effective in preventing compressor failures. It is particularly important to check whether the temperature/pressure correlations related to the refrigerant evaporation and condensation is proper. This makes it possible to quickly find out problems in the compressor or the system. If a failure or accident should occur in the compressor or the system, the operation logbook will help determine the cause and take prompt and proper actions.

Daily Maintenance Items

1. Lubrication oil level
When the oil level in the oil separator reaches the lower limit, charge lubricating oil by referring to the instruction manual of the unit.

2. Replacing oil filter element
When the differential pressure between the inlet and out let ports of the oil filter exceeds 0.1 MPa, replace the oil filter element. At the beginning of the operation, the differential pressure of the oil filter may increase quickly.

3. Cleaning of suction strainer
When the compressor operating hours exceeds 500, check the suction strainer. If a temporary filter is installed for the initial stage of operation, remove it. At the beginning of the operation or after periodical check, the differential pressure between the front and back of the suction strainer may increase quickly. If the differential pressure becomes large, check and clean the suction strainer.

4. Lubricating oil leak rate from mechanical seal
If much oil leaks from the mechanical seal, determine the leak rate per hour. The following table shows guidelines for allowable leak rate and the rate at which inspection must be done. If any problem (damage, etc.) is found in mechanical seal, replace the mechanical seal.

5. Contamination on the cooling water side of the cooling pipes of condenser and oil cooler
Clogging and contamination of the cooling pipe is largely affected by the quality of cooling water. When the oil temperature and discharge pressure gradually rise during the initial stage of operation, inspect and clean the cooling water side of oil cooler and condenser even when the time has not yet come at which inspection must be done.

P/N Part Name Code No. Remarks Q’ty.
1 Main Rotor Casing CS00100-160VXL 160VS* 1 (VS*)
1 Main Rotor Casing CS00100-160VXS 160VM* 1 (VM*)
1 Main Rotor Casing CS00100-160VXM 160VL* 1 (VL*)
2 Hexagon Socket Head Cap Screw NB35412-040 M12 x 40 52
3 Alignment Pin NE2013-040 Φ13 x 40 4
4 Eye Bolt NB600-16 M16 1
5 Suction Cover CS00500-160VX 160V** 1
6 Gasket, Suction Cover CS00601-160VN 160LDV 1
8 Spring Pin NE3204-010 Φ4 x 10 2
9 O-ring PA11-046 JIS B 2401 P46 1
10 A Plug NF06-008 R 1/4 1
10 B Plug NF06-008 R 1/4 1
10 C Plug NF06-010 R 3/8 1
10 D Plug NF06-010 R 3/8 1
11 Bearing Head CS01100-160VXG 160V** 1 (V*D)
11 Bearing Head CS01100-160VXD 160V*G 1 (V*G)
12 Gasket, Bearing Head CS01200-160VN 160*** 1
13 Eye Bolt NB600-12 M12 1
14 Spring Pin NE3204-010 Φ4 x 10 2
16 Bearing Cover CS01600-160VXG 160V** 1 (V*D)
16 Bearing Cover CS01600-160VXD 160V*G 1 (V*G)
17 Gasket, Bearing Cover (D) CS01700-160VG 160V** 1 (V*D)
17 Gasket, Bearing Cover (G) CS01700-160VD 160V*G 1 (V*G)
18 1 Hexagon Socket Head Cap Screw NB35412-040 M12 x 40 19 (V*D)
24 (V*G)
18 2 Hexagon Socket Head Cap Screw NB35412-080 M12 x 80 7 (V*D)
19 Alignment Pin NE2010-040 Φ10 x 40 2
20 Spring Pin NE3203-010 Φ3 x 10 1
22 Balance Piston Cover CS02200-160VX 160V** 1
23 Gasket, Balance Piston Cover CS02300-160N 160* 1
24 Hexagon Socket Head Cap Screw NB35410-025 M10 x 25 11
25 Male Rotor
CS02500-160VS 160VS* 1 (VS*)
26 Female Rotor
25 Male Rotor
CS02500-160VM 160VM* 1 (VM*)
26 Female Rotor
25 Male Rotor
CS02500-160VL 160VL* 1 (VL*)
26 Female Rotor
27 Main Bearing O-ring type CS0270-DRT 160*** 2
28 Side Bearing O-ring type CS0280-DRT 160*** 2
29 Snap Ring (Internal) NG11-102 H102 4
30 Balance Piston CS03000-160H 160**H 1
31 Key, Balance Piston CS03100-160 160** 1
32 Snap Ring (External) NG12-050 S50 1
33 Sleeve, Balance Piston CS03300-160H 160**H 1
34 Set Screw NA83606-015 M6 x 15 2
35 O-ring PA12-095 JIS B 2401 G95 1
36 O-ring Spacer CS03600-160 160*** 1
37 Snap Ring (Internal) NG11-102 H102 2
2201Q2JE-HO-S6-N_2015.06.
Chapter 7 Related Documents
SCV-series Screw Compressor 7.2 Parts Configuration Table 160V**
7-7
P/N Part Name Code No. Remarks Q’ty.
38 Thrust Bearing CS03800-160P 7212B 2
39 Lock Nut NG31-012 AN12 2
40 Lock Washer NG32-012 AW12 2
41 Spacer, Thrust Bearing Outer Race CS04100-160 160*** 2
42 Spacer, Thrust Bearing Alignment CS04200-160 160*** 2
43 Thrust Bearing Gland CS04300-160 160*** 2
45 Hexagon Head Bolt NB15510-030 M10 x 30 8
46 Conical Spring Washer ND150-010 M10 8
46 Lock Washer Set (old, plate type) CS0469-D 160*** 8ps/set -
48 Retainer, Oil Seal CS04800-160 160*** 1
49 O-ring PA12-090 JIS B 2401 G90 1
50 Oil Seal CS05010-160VD SA1J55 x 70 x 9 1
51 Seal Cover CS051000-160BBS 160*** 1
52 Gasket, Seal Cover CS05200-160N 160*** 1
53 Hexagon Socket Head Cap Screw NB35408-025 M8X25 8
54 Unloader Slide Valve CS05400-160VLD 160VS* 1 (VS*)
54 Unloader Slide Valve (with groove) - 160VS* 1 (VS*)
54 Unloader Slide Valve CS05400-160VSD 160VM* 1 (VM*)
54 Unloader Slide Valve (with groove) - 160VM* 1 (VM*)
54 Unloader Slide Valve CS05400-160VMD 160VL* 1 (VL*)
54 Unloader Slide Valve (with groove) - 160VL* 1 (VL*)
58 Hexagon Socket Head Cap Screw NB35406-030 M6 x 30 5
60 Unloader Cylinder CS06000-160VX 160V** 1
61 Hexagon Socket Head Cap Screw NB35410-025 M10 x 25 2
62 Hexagon Socket Head Cap Screw NB35410-065 M10 x 65 6
63 O-ring PA12-125 JIS B 2401 G125 1
64 Unloader Piston CS06400-160D 160*** 1
65 O-ring PA11-100 JIS B 2401 P100 1
66 Teflon Cap Seal CS06600-160 CAP-1BE100 1
67 Push Rod, Unloader Slide Valve CS06700-160VD 160V** 1
68 Guide Pin NE2503-008 Φ3 x 8 1
69 Lock Nut NG31-005 AN05 1
70 Lock Washer NG32-005 AW05 1
73 O-ring PA11-021 JIS B 2401 P21 1
74 Unloader Cover CS07400-160 160* 1
75 O-ring PA12-110 JIS B 2401 G110 1
76 Hexagon Socket Head Cap Screw NB35408-025 M8 x 25 8
77 Indicator Cam CS07700-160VXML 160VS* 1 (VS*)
77 Indicator Cam CS07700-160VXS 160VM*160VL* 1 (VM*)
1 (VL*)
78 Ball Bearing CS07800-200 #6000 1
79 Snap Ring (External) NG12-010 S10 1
80 Bearing Gland CS08000-200 200*** 1
81 Hexagon Socket Head Cap Screw NB35406-015 M6 x 15 3
82 V-ring CS08200-200B 20 x 10 x 12 1
83 Spring CS08300-200 200*** 1
84 Retainer, Indicator Cam Spring CS08400-200 200*** 1
2201Q2JE-HO-S6-N_2015.06.
Chapter 7 Related Documents
SCV-series Screw Compressor 7.2 Parts Configuration Table 160V**
7-8
P/N Part Name Code No. Remarks Q’ty.
91 Shaft Key CS09100-160 160*** 1
92 Suction Flange CS71400-125MK MYK125A 1
93 Gasket, Suction Flange CR72000-125N MYK125A 1
94 Hexagon Head Bolt NB12020-055 M20 x 55 8
95 Discharge Flange without hole CS71400-P100CD MYK100CD 1 (V*D)
95 Discharge Flange with hole CS71400-100CDMK MYK100CD 1 (V*D)
95 Discharge Flange without hole - MYK100A
Female 1
95 Discharge Flange with hole CS74100-100 MYK100A
Female 1
96
Gasket, Discharge Flange (for the case V*G
model or V*D model used No.235) CR72000-100N MYK100A 1
97
Hexagon Head Bolt (for the case that is not
using No.235 Discharge flange spacer) NB12022-055 M22 x 55 4
97
Hexagon Head Bolt (for the case using
No.235 Discharge flange spacer) NB12022-080 M22 x 80 4
100 Mechanical Seal Assembly CS10000-160BT 160V** BOS Type 1
100 Mechanical Seal Assembly CS10002-160EBS BBS-E 1
120 Unloader Indicator Assembly CS12000-200VXF V-series 0-100% 1
125 Micro-Switch CS12500-200 200*** Z15GW 2
127 Micro-Switch Cam CS1279-200V 200VS\L 1
129 Wire wound type Potentiometer CS1299-E10 with Wires 1
129 Conductive Plastic type Potentiometer CS12919-E10 with Wires -
137 Indicator Dial CS13700-200VD 200VL* 1
235
Spacer, Discharge Flange
(This spacer is not necessary for CD flange.) FX101-160 1 (V*D)
236 Gasket, Discharge Flange Spacer CS23600-160N 1 (V*D)
237 Torsional Slip Washer CS23700-160 160*** 2
250 Thrust Washer CS25000-160 160*** 2
251 Electromizer (Economizer) Flange CR74000-025 MYK25A 1
252 Gasket. Electromizer (Economizer) Flange CR72000-025N 1
253 Hexagon Head Bolt NB15512-035 M12 x 35 4
254 Liquid Injection (Aquamizer) Flange CR74000-020 MYK20A 1
255 Gasket, Liquid Injection Flange CR72000-020N 1
256 Hexagon Head Bolt NB15512-035 M12 x 35 2
267 Special Spring Washer ND330-06 M6 5
289 Variable Vi auxiliary Slide Valve CS28900-160VLD 160VS* 1 (VS*)
289 Variable Vi auxiliary Slide Valve CS28900-160VSD 160VM* 1 (VM*)
289 Variable Vi auxiliary Slide Valve CS28900-160VMD 160VL* 1 (VL*)
325 O-ring PA11-030 JIS B 2401 P30 2
326 O-ring Gland CS32600-160VD 1
420 Spacer, Unloader Positioning CS42000-160VSD 160VS* 1 (VS*)
420 Spacer, Unloader Positioning CS42000-160VMD 160VM* 1 (VM*)
421 O-ring PA11-030 JIS B 2401 P30 1 (VS*)
432 O-ring PA12-085 JIS B 2401 G85 4
433 O-ring PA12-085 JIS B 2401 G85 4
444 Vi Adjusting Rod CS44400-160VLD 160VS* 1 (VS*)
444 Vi Adjusting Rod CS44400-160VSD 160VM* 1 (VM*)
444 Vi Adjusting Rod CS44400-160VMD 160VL* 1 (VL*)
445
Lock Washer, Variable Vi Auxiliary Slide
Valve
CS44500-160VD 160V** 1
446 Vi Square Washer, Teflon Bushing CS44600-160VD 1
2201Q2JE-HO-S6-N_2015.06.
Chapter 7 Related Documents
SCV-series Screw Compressor 7.2 Parts Configuration Table 160V**
7-9
P/N Part Name Code No. Remarks Q’ty.
448 Teflon Bushing CS44800-160VD 1
449 Thrust Washer CS44900-160VD 2
450 O-ring PA11-025 JIS B 2401 P25 2
451 O-ring PA11-025 JIS B 2401 P25 1
452 Hexagon Socket Head Cap Screw NB35404-010 M4 x 10 1
453 Hexagon Nut NC720-24 M24 1
454 Hexagon Socket Head Cap Screw NB35404-020 M4 x 20 1
455
Spring Washer, Hexagon Socket Head Cap
Screw ND330-04 M4 1
456 Hexagon Socket Head Cap Screw NB35405-010 M5 x 10 2
458 Plug NF06-004 R 1/8 4
459 Plug NF06-015 R 1/2 1
522 Domed Cap Nut NC921-24 M24 1
523 O-ring PA11-025 JIS B 2401 P25 1
533
Spring Washer, Hexagon Socket Head Cap
Screw ND330-04 M4 1
605 Plug NF06-015 R 1/2 1
607 A Plug NF06-008 R 1/4 1
607 B Plug NF06-008 R 1/4 1
607 C Plug NF06-008 R 1/4 1
680 A Conical Spring Washer, Vi Adjusting Rod ND160-024 M24 1
680 B Conical Spring Washer, Vi Adjusting Rod ND160-024 M24 1
 The part code of the O-ring is the one assigned to NBR which is standard material.
When the material of the O-ring is other than NBR, a different part code is used for
each material.
If you are using O-rings made from other than the standard material, please contact
MAYEKAWA when placing an order.
 The Code No. of parts shown in parentheses below is applied to the product until the
end of November, 2014:
(P/N 120 Unloader Indicator Assembly, P/N 125 Micro-Switch, P/N 129 Potentiometer)
 For the Code No. of new type indicator part, refer to the separately dedicated
Instruction manual for it.
2201Q2JE-HO-S6-N_2015.06.
Chapter 7 Related Documents
SCV-series Screw Compressor 7.2 Parts Configuration Table 200V**
7-10
Table 7-2 Parts Configuration Table of 200V** models
P/N Part Name Code No. Remarks Q’ty.
1 Main Rotor Casing CS00100-200VXS 200VS* 1 (VS*)
1 Main Rotor Casing CS00100-200VXM 200VM* 1 (VM*)
1 Main Rotor Casing CS00100-200VXL 200VL* 1 (VL*)
2 Hexagon Socket Head Cap Screw NB35416-050 M16X50 50
3 Alignment Pin NE2016-055 Φ16X55 4
4 Eye Bolt NB600-20 M24 1
5 Suction Cover CS00500-200VX 200V** 1
6 Gasket, Suction Cover CS00601-200VN 200*** 1
8 Spring Pin NE3206-012 Φ6X12 2
9 O-ring PA12-060 JIS B 2401 G60 1
10 A Plug NF06-010 R3/8 1
10 B Plug NF06-008 R1/4 1
10 C Plug NF06-015 R1/2 1
10 D Plug NF06-015 R1/2 1
11 Bearing Head CS01100-200VXD 200V** 1 (V*D)
11 Bearing Head CS01100-200VXG 200V*G 1 (V*G)
12 Gasket, Bearing Head CS01200-200N 200*** 1
13 Eye Bolt NB600-12 M12 1
14 Spring Pin NE3206-012 Φ6X12 2
16 Bearing Cover CS01600-200VXD 200V** 1 (V*D)
16 Bearing Cover CS01600-200VXG 200V*G 1 (V*G)
17 Gasket, Bearing Cover (D) CS01700-200VD 200V** 1 (V*D)
17 Gasket, Bearing Cover (G) CS01700-200VG 200V*G 1 (V*G)
18 1 Hexagon Socket Head Cap Screw NB35416-050 M16X50 15 (V*D)
18 (V*G)
18 2 Hexagon Socket Head Cap Screw NB35416-075 M16X75 8 (V*D)
18 3 Hexagon Socket Head Cap Screw NB35416-065 M16X65 6
19 Alignment Pin NE2010-050 Φ10X50 2
20 Spring Pin NE3203-010 Φ3X10 1
21 Plug NF06-004 R1/8 1
22 Balance Piston Cover CS02200-200VX 200V** 1
23 Gasket, Balance Piston Cover CS02300-200N 200V** 1
24 Hexagon Socket Head Cap Screw NB35412-030 M12X30 11
25 Male Rotor
CS02500-200VS 200VS* 1
26 Female Rotor
25 Male Rotor
CS02500-200VM 200VM* 1
26 Female Rotor
25 Male Rotor
CS02500-200VL 200VL* 1
26 Female Rotor
27 Main Bearing O-ring type CS0270-ERT 200*** 2
28 Side Bearing O-ring type CS0280-ERT 200*** 2
29 Snap Ring (Internal) NG11-130 H130 4
30 Balance Piston CS03000-200H 200**LDH 1
31 Key, Balance Piston CS03100-200 200V** 1
32 Snap Ring (External) NG12-065 S65 1
33 Sleeve, Balance Piston CS03300-200H 200**H 1
34 Set Screw NA83608-015 M8X15 2
35 O-ring PA11-120 JTS B 2401 P120 1
36 O-ring Spacer CS03600-200 200*** 1
2201Q2JE-HO-S6-N_2015.06.
Chapter 7 Related Documents
SCV-series Screw Compressor 7.2 Parts Configuration Table 200V**
7-11
P/N Part Name Code No. Remarks Q’ty.
37 Snap Ring (Internal) NG11-130 H130 2
38 Thrust Bearing CS03800-200P 200*** PPS 2
39 Lock Nut NG31-013 AN13 2
40 Lock Washer NG32-013 AW13 2
41 Spacer, Thrust Bearing Outer Race CS04100-200 200*** 2
42 Spacer, Thrust Bearing Alignment CS04200-200 200*** 2
43 Thrust Bearing Gland CS04300-200 200*** 2
45 Hexagon Head Bolt NB15512-035 M12X35 8
46 Conical Spring Washer ND150-012 M12 1L 8
46 Lock Washer Set (old, plate type) CS0469-E 200*** 8p./set -
48 Retainer, Oil Seal CS04800-200VD 200V** 1
49 O-ring PA12-115 JIS B 2401 G115 1
50 Oil Seal CS05010-200VD SA1J65x85x12 1
51 Seal Cover CS051000-200BBS 200V** 1
52 Gasket, Seal Cover CS05200-200N 200V** 1
53 Hexagon Socket Head Cap Screw NB35410-025 M10X25 8
54 Unloader Slide Valve CS05400-200VSD 200VS* 1 (VS*)
54 Unloader Slide Valve (with groove) - 200VS* 1 (VS*)
54 Unloader Slide Valve - 200VS* K-port 1 (VS*)
54 Unloader Slide Valve CS05400-200VMD 200VM* 1 (VM*)
54 Unloader Slide Valve (with groove) - 200VM* 1 (VM*)
54 Unloader Slide Valve CS05400-200VLD 200VL* 1 (VL*)
54 Unloader Slide Valve (with groove) - 200VL* 1 (VL*)
58 Hexagon Socket Head Cap Screw NB35408-045 M8X45 5
60 Unloader Cylinder CS06000-200VX 200V** 1
61 Hexagon Socket Head Cap Screw NB35412-030 M12X30 2
62 Hexagon Socket Head Cap Screw NB35412-075 M12X75 6
63 O-ring PA12-150 JIS B 2401 G150 1
64 Unloader Piston CS06400-200D 200*** 1
65 O-ring PA11-125 JTS B 2401 P125 1
66 Teflon Cap Seal CS06600-200 CAP-3BE125 1
67 Push Rod, Unloader Slide Valve CS0671-EV 200V** 1
68 Guide Pin NE2505-012 Φ5X12 1
69 Lock Nut NG31-007 AN07 1
70 Lock Washer NG32-007 AW07 1
73 O-ring PA12-030 JIS B 2401 G30 1
74 Unloader Cover CS07400-200 200*** 1
75 O-ring PA12-135 JIS B 2401 G135 1
76 Hexagon Socket Head Cap Screw NB35410-025 M10X25 8
77 Indicator Cam CS07700-200VXS 200VS* 1 (VS*)
77 Indicator Cam CS07700-200VXML 200VM* 200VL* 1 (VM*)
1 (VL*)
78 Ball Bearing CS07800-200 #6000 1
79 Snap Ring (External) NG12-010 S10 1
80 Bearing Gland CS08000-200 200V** 1
81 Hexagon Socket Head Cap Screw NB35406-015 M6X15 3
82 V-ring CS08200-200B 20X10X12 1
2201Q2JE-HO-S6-N_2015.06.
Chapter 7 Related Documents
SCV-series Screw Compressor 7.2 Parts Configuration Table 200V**
7-12
P/N Part Name Code No. Remarks Q’ty.
83 Spring CS08300-200 200V** 1
84 Retainer, Indicator Cam Spring CS08400-200 200*** 1
91 Shaft Key CS09100-200 200*** 1
92 Suction Flange without hole CS71400-P150 MYK150A(6") 1
93 Gasket, Suction Flange CR72000-150N MYK150A 1
94 Hexagon Head Bolt NB12022-055 M22X55 8
95 Discharge Flange without hole - MYK125A Female 1
95 Discharge Flange with hole CS74100-125 MYK125A Female 1
95 Discharge Flange without hole CS71400-P125CD MYK125CD 1 (V*D)
95 Discharge Flange with hole CS71400-125CDMK MYK125CD 1 (V*D)
96
Gasket, Discharge Flange (for the case V*G
model or V*D model used No.235) CR72000-125N MYK125A 1
97
Hexagon Head Bolt (for the case that is not
using No.235 Discharge flange spacer) NB12020-055 M20X55 8
97
Hexagon Head Bolt (for the case using
No.235 Discharge flange spacer) NB12020-080 M20X80 8
100 Mechanical Seal Assembly CS10002-200EBS 200BBSE 1
100 Mechanical Seal Assembly CS10000-200BE 200*** BOS TYPE -
120 Unloader Indicator Assembly CS12000-200VXF V-series 0-100% 1
125 Micro-Switch CS12500-200 200*** Z15GW 2
127 Micro-Switch Cam CS1279-200V 200VS\L 1
129 Wire wound type Potentiometer CS1299-E10 with wires 1
129 Conductive Plastic type Potentiometer CS12919-E10 with wires -
137 Indicator Dial CS13700-200VD 200V** L,M,H-port 1
215 Flange, Lubricating Oil inlet (Journal)
with hole CR74000-020 MM(MYK)
20A(3/4") 1
216 Gasket, Lubricating Oil inlet Flange CR72000-020N MYK20A 1
217 Hexagon Head Bolt NB15512-035 M12 X35 2
235
Spacer, Discharge Flange
(This spacer is not necessary for CD flange.) FX101-200 200V** 1 (V*D)
236 Gasket, Discharge Flange Spacer CS23600-200N 200V** 1 (V*D)
237 Torsional Slip Washer CS23700-200 200*** 2
250 Thrust Washer CS25000-200 200*** 2
251 Electromizer (Economizer) Flange with hole CR74000-032 MM(MYK)
32A(l"1/4) 1
252 Gasket. Electromizer (Economizer) Flange CR72000-032N MYK32A 1
253 Hexagon Head Bolt NB15512-040 M12X40 4
254 Liquid Injection (Aquamizer) Flange CR74000-025 MM(MYK) 25A(1") 1
255 Gasket, Liquid Injection Flange CR72000-025N MYK25A 1
256 Hexagon Head Bolt NB15512-035 M12X35 4
267 Special Spring Washer, Hexagon Socket Head
Cap Screw ND330-08 M8 5
289 Variable Vi auxiliary Slide Valve CS28900-200VSD 200VS* 1 (VS*)
289 Variable Vi auxiliary Slide Valve CS28900-200VMD 200VM* 1 (VM*)
289 Variable Vi auxiliary Slide Valve CS28900-200VLD 200VL* 1 (VL*)
325 O-ring PA11-040 JIS B 2401 P40 2
326 O-ring Gland CS32600-200VD 200V** 1
420 Spacer, Unloader Positioning CS42000-200VSD 200VS* 1 (VS*)
420 Spacer, Unloader Positioning CS42000-200VMD 200VM* 1 (VM*)
421 O-ring PA11-040 JIS B 2401 P40 2 (VS*)
432 O-ring PA62-022 AS568A-244 4
433 O-ring PA62-022 AS568A-244 4
2201Q2JE-HO-S6-N_2015.06.
Chapter 7 Related Documents
SCV-series Screw Compressor 7.2 Parts Configuration Table 200V**
7-13
P/N Part Name Code No. Remarks Q’ty.
444 Vi Adjusting Rod CS44400-200VSD 200VS* 1 (VS*)
444 Vi Adjusting Rod CS44400-200VMD 200VM* 1 (VM*)
444 Vi Adjusting Rod CS44400-200VLD 200VL* 1 (VL*)
445 Lock Washer, Variable Vi Auxiliary Slide Valve CS44500-200VD 200V** 1
446 Vi Square Washer, Teflon Bushing CS44600-200VD 200V** 1
448 Teflon Bushing CS44800-200VD 200V** 1
449 Thrust Washer CS44900-200VD 160V** to 320VD 2
450 O-ring PA11-035 JIS B 2401 P35 2
451 O-ring PA11-035 JIS B 2401 P35 1
452 Hexagon Socket Head Cap Screw NB35405-015 M5X15 1
453 Hexagon Nut NC140-30 M30 1
454 Hexagon Socket Head Cap Screw NB35406-020 M6X20 1
455
Special Spring Washer, Hexagon Socket Head
Cap Screw ND330-06 M6 1
456 Hexagon Socket Head Cap Screw NB35405-012 M5X12 2
458 1 Plug NF06-008 R1/4 1
458 2 Plug NF06-004 R1/8 3
459 Plug NF06-020 R3/4 1
522 Domed Cap Nut NC921-30 M30 1
523 O-ring PA11-035 JIS B 2401 P35 1
528 Oil Seal Sleeve CS52810-200VD 200V** 1
528 Oil Seal Sleeve with O-ring CS52809-200VD 200V** 1
529 Set screw NA83606-008 M6X8 2
533
Spring Washer, Hexagon Socket Head Cap
Screw ND320-005 M5 1
605 Plug NF06-020 R3/4 1
607 A Plug NF06-008 R1/4 1
607 B Plug NF06-008 R1/4 1
680 A Conical Spring Washer, Vi Adjusting Rod ND160-030 M30 Type 1
680 B Conical Spring Washer, Vi Adjusting Rod ND160-030 M30 Type 1
715 Cover Plate, Lubricating oil inlet Flange CS71500-020 20A 1
715 Cover Plate, Economizer inlet Flange CS71500-032 32A 1
715 Cover Plate, Liquid injection Flange CS71500-025 25A 1
744 O-ring PA12-060 JIS B 2401 G60 1
 The part code of the O-ring is the one assigned to NBR which is standard material.
When the material of the O-ring is other than NBR, a different part code is used for
each material.
If you are using O-rings made from other than the standard material, please contact
MAYEKAWA when placing an order.
 The Code No. of parts shown in parentheses below is applied to the product until the
end of November, 2014:
(P/N 120 Unloader Indicator Assembly, P/N 125 Micro-Switch, P/N 129 Potentiometer)
 For the Code No. of new type indicator part, refer to the separately dedicated
Instruction manual for it.
2201Q2JE-HO-S6-N_2015.06.
Chapter 7 Related Documents
SCV-series Screw Compressor 7.2 Parts Configuration Table 250V**
7-14
Table 7-3 Parts Configuration Table of 250V** models
P/N Part Name Code No. Remarks Q’ty.
1 Main Rotor Casing CS00100-250VXS 250VS* 1 (VS*)
1 Main Rotor Casing CS00100-250VXM 250VM* 1 (VM*)
1 Main Rotor Casing CS00100-250VXL 250VL* 1 (VL*)
1 Main Rotor Casing - 250VLL* 1 (VLLD)
2 Hexagon Socket Head Cap Screw NB35420-060 M20×60 44
3 Alignment Pin NE2016-070 Φ16×70 4
4 Eye Bolt NB600-30 M30 1
5 Suction Cover CS00500-250VX 250V** 1
5 Suction Cover - 250WV* 1 (VLLD)
6 Gasket, Suction Cover CS00601-250VN 250*** 1
7 Eye Bolt NB600-12 M12 2
8 Spring Pin NE3206-012 Φ6×12 2
9 O-ring PA12-065 JIS B 2401 G65 1
10 A Plug NF06-010 R3/8 1
10 B Plug NF06-008 R1/4 1
10 C Plug NF06-020 R3/4 1
10 D Plug NF06-015 R1/2 1
11 Bearing Head CS01100-250VXD 250V** 1 (V*D)
11 Bearing Head CS01100-250VXG 250V*G 1 (V*G)
12 Gasket, Bearing Head CS01200-250N 250*** 1
13 Eye Bolt NB600-12 M12 1
14 Spring Pin NE3206-012 Φ6×12 2
16 Bearing Cover CS01600-250VXD 250V** 1 (V*D)
16 Bearing Cover CS01600-250VXG 250V*G 1 (V*G)
17 Gasket, Bearing Cover (D) CS01700-250VD 250V** 1 (V*D)
17 Gasket, Bearing Cover (G) CS01700-250VG 250V*G 1 (V*G)
18 1 Hexagon Socket Head Cap Screw NB35416-050 M16×50
18 (V*D)
22 (V*G)
18 2 Hexagon Socket Head Cap Screw NB35416-090 M16×90 8 (V*D)
18 3 Hexagon Socket Head Cap Screw NB35416-070 M16×70 5
19 Alignment Pin NE2010-050 Φ10×50 2
20 Spring Pin NE3203-010 Φ3×10 1
21 Plug NF06-004 R1/8 1
22 Balance Piston Cover CS02200-250VX 250V** 1
23 Gasket, Balance Piston Cover CS02300-250N 250*** 1
24 Hexagon Socket Head Cap Screw NB35412-030 M12×30 11
25 Male Rotor
CS02500-250VS 250VS* 1 (VS*)
26 Female Rotor
25 Male Rotor
CS02500-250VM 250VM* 1 (VM*)
26 Female Rotor
25 Male Rotor
CS02500-250VL 250VL* 1 (VL*)
26 Female Rotor
27 Main Bearing O-ring type CS0270-FRT 250*** 2
28 Side Bearing O-ring type CS0280-FRT 250*** 2
2201Q2JE-HO-S6-N_2015.06.
Chapter 7 Related Documents
SCV-series Screw Compressor 7.2 Parts Configuration Table 250V**
7-15
P/N Part Name Code No. Remarks Q’ty.
29 Snap Ring (Internal) NG11-160 H160 4
30 Balance Piston CS03000-250H 250**H 1
31 Key, Balance Piston CS03100-250 250*** 1
32 Snap Ring (External) NG12-080 S80 1
33 Sleeve, Balance Piston CS03300-250H 250**H 1
34 Set Screw NA83608-020 M8×20 2
35 O-ring PA11-150 JIS B 2401 P150 1
36 O-ring Spacer CS03600-250 250*** 1
37 Snap Ring (Internal) NG11-160 H160 2
38 Thrust Bearing CS03800-250P 250*** PPS 2
39 Lock Nut NG31-017 AN17 2
40 Lock Washer NG32-017 AW17 2
42 Spacer, Thrust Bearing Alignment CS04200-250 250*** 2
43 Thrust Bearing Gland CS04300-250 250*** 2
45 Hexagon Head Bolt NB15516-045 M16×45 8
46 Conical Spring Washer ND150-016 M16 1L 8
46 Lock Washer Set (old, plate type) CS0469-F 250*** 8p./set -
48 Retainer, Oil Seal CS04800-250VD
250V**
BBSⅢ BBSE BOS 1
49 O-ring PA12-135 JIS B 2401 G135 1
50 Oil Seal CS05010-250VD SA1J 75×100×13 1
51 Seal Cover CS05100-250BBS
250V**
BBSⅢ BBSE BOS 1
52 Gasket, Seal Cover CS05200-250N 250*** 1
53 Hexagon Socket Head Cap Screw NB35412-030 M12×30 8
54 Unloader Slide Valve CS05400-250VSD 250VS* 1 (VS*)
54 Unloader Slide Valve CS05400-250VMD 250VM* 1 (VM*)
54 Unloader Slide Valve CS05400-250VLD 250VL* 1 (VL*)
54 Unloader Slide Valve - 250VLL* 1 (VLLD)
58 Hexagon Socket Head Cap Screw NB35410-055 M10×55 5
60 Unloader Cylinder CS06000-250VX 250V** 1
61 Hexagon Socket Head Cap Screw NB35416-040 M16×40 2
62 Hexagon Socket Head Cap Screw NB35416-090 M16×90 6
63 O-ring PA12-190 JIS B 2401 G190 1
64 Unloader Piston CS06400-250D 250*** 1
65 O-ring PA11-155 JISB2401 1A P155 1
66 Teflon Cap Seal CS06600-250 SUNR-BE-155 1
67 Push Rod, Unloader Slide Valve CS06700-250VD 250V** 1
67 Push Rod, Unloader Slide Valve CS06700-250VLLD 250VLL* 1 (VLLD)
68 Guide Pin NE2505-012 Φ5×12 1
69 Lock Nut NG31-008 AN08 1
70 Lock Washer NG32-008 AW08 1
73 O-ring PA12-035 JIS B 2401 G35 1
74 Unloader Cover CS07400-250 250*** 1
75 O-ring PA12-170 JIS B 2401 G170 1
2201Q2JE-HO-S6-N_2015.06.
Chapter 7 Related Documents
SCV-series Screw Compressor 7.2 Parts Configuration Table 250V**
7-16
P/N Part Name Code No. Remarks Q’ty.
76 Hexagon Socket Head Cap Screw NB35412-030 M12×30 8
77 Indicator Cam CS07700-250VXS 250VS* 1 (VS*)
77 Indicator Cam CS07700-250VXML 250VL*/VM*
1 (VM*)
1 (VL*)
1(VLLD)
78 Ball Bearing CS07800-200 #6000 1
79 Snap Ring (External) NG12-010 S10 1
80 Bearing Gland CS08000-200 200V** 1
81 Hexagon Socket Head Cap Screw NB35406-015 M6×15 3
82 V-ring CS08200-200B 20×10×12 1
83 Spring CS08300-200 200V** 1
84 Retainer, Indicator Cam Spring CS08400-200 200*** 1
91 Shaft Key CS09100-250 250*** 1
92 Suction Flange without hole CS71400-P250 MYK250A Male 1
92 Suction Flange with hole CS71400-250MK MYK250A Male 1
93 Gasket, Suction Flange CS09300-250N MYK250A 1
94 Hexagon Head Bolt NB12024-065 M24×65 12
95 Discharge Flange without hole CS71400-P150CD MYK150CD Male 1 (*UD)
95 Discharge Flange with hole CS71400-150CDMK MYK150CD Male 1 (*UD)
95 Discharge Flange without hole - MYK150A Female 1 (*UD)
95 Discharge Flange with hole CR74100-150 MYK150A Female 1 (*UD)
95 Discharge Flange without hole CS71400-P150 MYK150A Male 1 (*G)
95 Discharge Flange with hole CR74000-150 MYK150A Male 1 (*G)
96
Gasket, Discharge Flange (for the case V*G
model or V*D model used No.235) CR72000-150N MYK150A 1
97
Hexagon Head Bolt (for the case that is not
using No.235 Discharge flange spacer) NB12022-055 M22×55 8
97
Hexagon Head Bolt (for the case using
No.235 Discharge flange spacer) NB12022-085 M22×85 8
100 Mechanical Seal Assembly CS10000-250BE BOS-E1 1
100 Mechanical Seal Assembly CS10002-250EBS BBS-E 1
120 Unloader Indicator Assembly CS12000-VXF V-series 0-100% 1
125 Micro-Switch CS12500-200 200*** Z15GW 2
127 Micro-Switch Cam CS1279-200V 200VS\L 1
129 Wire wound type Potentiometer CS1299-E10 with lead wire 1
129 Conductive Plastic type Potentiometer CS12919-E10 with lead wire -
137 Indicator Dial CS13700-200VD 200V** L,M,H-port 1
137 Indicator Dial CS13700-200VD 250VLL* 1 (VLLD)
215
Flange, Lubricating Oil inlet (Journal)
with hole CR74000-025 MYK25A Male 1
216 Gasket, Lubricating Oil inlet Flange CR72000-025N MYK25A 1
217 Hexagon Head Bolt NB111012-035 M12×35 4
235 Spacer, Discharge Flange
(This spacer is not necessary for CD flange.) FX101-250 250*** 1(V*D)
236 Gasket, Discharge Flange Spacer CS23600-250N 250*** 1(V*D)
237 Torsional Slip Washer CS23700-250 250*** 2
250 Thrust Washer CS25000-250 250*** 2
251 Electromizer (Economizer) Flange without
hole CS71400-050 MYK50A Male 1
2201Q2JE-HO-S6-N_2015.06.
Chapter 7 Related Documents
SCV-series Screw Compressor 7.2 Parts Configuration Table 250V**
7-17
P/N Part Name Code No. Remarks Q’ty.
251 Electromizer (Economizer) Flange with hole CR74000-050 MYK50A Male 1
252 Gasket. Electromizer (Economizer) Flange CR72000-050N MYK50A 1
253 Hexagon Head Bolt NB111016-045 M16×45 4
254 Liquid Injection Flange with hole CR74000-032 MYK32A Male 1
255 Gasket, Liquid Injection Flange CR72000-032N MYK32A 1
256 Hexagon Head Bolt NB111012-040 M12×40 4
267
Special Spring Washer, Hexagon Socket
Head Cap Screw ND330-10 M10 TYPE 5
289 Variable Vi auxiliary Slide Valve CS28900-250VSD 250VS* 1 (VS*)
289 Variable Vi auxiliary Slide Valve CS28900-250VMD 250VM* 1 (VM*)
289 Variable Vi auxiliary Slide Valve CS28900-250VLD 250VL* 1 (VL*)
289 Variable Vi auxiliary Slide Valve - 250VLL* 1 (VLLD)
325 O-ring PA11-046 JIS B 2401 P46 2
326 O-ring Gland CS32600-250VD 250V** 1
420 Spacer, Unloader Positioning CS42000-250VSD 250VS* 1 (VS*)
420 Spacer, Unloader Positioning CS42000-250VMD 250VM* 1 (VM*)
421 O-ring PA11-046 JIS B 2401 P46 2 (VS*)
432 O-ring PA12-130 JIS B 2401 G130 4
433 O-ring PA12-130 JIS B 2401 G130 4
444 Vi Adjusting Rod CS44400-250VSD 250VS* 1 (VS*)
444 Vi Adjusting Rod CS44400-250VMD 250VM* 1 (VM*)
444 Vi Adjusting Rod CS44400-250VLD 250VL* 1 (VL*)
444 Vi Adjusting Rod CS44400-250VLL 250VLL* 1 (VLLD)
445
Lock Washer, Variable Vi Auxiliary Slide
Valve CS44500-250VD 200V** 1
446 Vi Square Washer, Teflon Bushing CS44600-250VD 250V*** 1
448 Teflon Bushing CS44800-250VD 250V** 1
449 Thrust Washer CS44900-250VD 250V** 2
450 O-ring PA11-040 JIS B 2401 P40 2
451 O-ring PA11-040 JIS B 2401 P40 1
452 Hexagon Socket Head Cap Screw NB35406-020 M6×20 1
453 Hexagon Nut NC720-36 M36 1
454 Hexagon Socket Head Cap Screw NB35406-035 M6×35 1
455
Special Spring Washer, Hexagon Socket
Head Cap Screw ND330-06 M6 1
456 Hexagon Socket Head Cap Screw NB35405-010 M5×12 4
458 1 Plug NFO6-015 R1/2 1
458 2 Plug NFO6-004 R1/8 2
458 3 Plug NFO6-008 R1/4 1
459 Plug NFO6-015 R1/2 1
522 Domed Cap Nut NC921-36 M36 1
523 O-ring PA11-040 JIS B 2401 P40 1
528 Oil Seal Sleeve CS52810-250VD 250V** 1
528 Oil Seal Sleeve with O-ring CS52809-250VD 250V** 1
529 Set screw NA83606-008 M6×8 2
533 Spring Washer, Hexagon Socket Head Cap
Screw ND330-06 M6 1
2201Q2JE-HO-S6-N_2015.06.
Chapter 7 Related Documents
SCV-series Screw Compressor 7.2 Parts Configuration Table 250V**
7-18
P/N Part Name Code No. Remarks Q’ty.
605 Plug NF06-025 R 1" 1
607 A Plug NF06-008 R1/4 1
607 B Plug NF06-008 R1/4 1
680 A Conical Spring Washer, Vi Adjusting Rod ND160-036 M36 1
680 B Conical Spring Washer, Vi Adjusting Rod ND160-036 M36 1
715 Cover Plate, Lubricating oil inlet Flange CS71500-025 25A 1
715 Cover Plate, Liquid injection Flange CS71500-032 32A 1
744 O-ring PA12-070 JIS B 2401 G70 1
 The part code of the O-ring is the one assigned to NBR which is standard material.
When the material of the O-ring is other than NBR, a different part code is used for
each material.
If you are using O-rings made from other than the standard material, please contact
MAYEKAWA when placing an order.
 The Code No. of parts shown in parentheses below is applied to the product until the
end of November, 2014:
(P/N 120 Unloader Indicator Assembly, P/N 125 Micro-Switch, P/N 129 Potentiometer)
 For the Code No. of new type indicator part, refer to the separately dedicated
Instruction manual for it.
The sizes of O-ring No.432-2 and No.432-2 have been changed to G130 from G135 in October 2012
.a s a design change.
2201Q2JE-HO-S6-N_2015.06.
Chapter 7 Related Documents
SCV-series Screw Compressor 7.2 Parts Configuration Table 320V*D
7-19
Table 7-4 Parts Configuration Table of 320V*D models
P/N Part Name Code No. Remarks Q’ty.
1 Main Rotor Casing CS00100-320VXS 320VS* 1(VSD)
1 Main Rotor Casing CS00100-320VXM 320VM* 1(VMD)
1 Main Rotor Casing CS00100-320VXL 320VL* 1(VLD)
2 Hexagon Socket Head Cap Screw NB35424-080 M24×80 52
3 Alignment Pin NE2025-080 Φ25×80 4
4 Eye Bolt NB600-30 M30 2
5 Suction Cover CS00500-320VXD 320V*D 1
6 Gasket, Suction Cover CS00600-320VD 320*** 1
7 Eye Bolt NB600-16 M16 2
8 Spring Pin NE3206-018 Φ6×18 2
9 O-ring PA11-058 JIS B 2401 P58 1
10 A Plug NF06-020 R3/4 1
10 B Plug NF06-015 R1/2 2
11 Bearing Head CS01100-320VXD 320V*D 1
12 Gasket, Bearing Head CS01200-320N 320*** 1
13 Eye Bolt NB600-16 M30
(from 2006.03.30) 1
14 Spring Pin NE3206-018 Φ6×18 2
15 Plug NF06-010 R 3/8 1
16 Bearing Cover CS01600-320VXD 320V*D 1
17 Gasket, Bearing Cove CS01700-320VD 320V*D 1
18 1 Hexagon Socket Head Cap Screw NB35420-070 M20×70 19
18 2 Hexagon Socket Head Cap Screw NB35420-120 M20×120 12
18 3 Hexagon Socket Head Cap Screw NB35420-120 M20×120 6
19 Alignment Pin NE2016-070 Φ16×70 2
20 Spring Pin NE3203-016 Φ3×16 1
21 Plug NF06-008 R1/4 1
22 Balance Piston Cover CS02200-320 320*** 1
23 Gasket, Balance Piston Cover CS02300-320N 320*** 1
24 Hexagon Socket Head Cap Screw NB35416-045 M16×45 11
25 Male Rotor
CS02500-320VS 320VS* 1(VSD)
25 Female Rotor
25 Male Rotor
CS02500-320VM 320VM* 1(VMD)
26 Female Rotor
25 Male Rotor
CS02500-320VL 320VL* 1(VLD)
26 Female Rotor
27 Main Bearing O-ring type CS0270-GRT 320*** 2
28 Side Bearing O-ring type CS0280-GRT 320*** 2
29 Snap Ring (Internal) NG11-200 H200 4
30 Balance Piston CS03000-320H 320**H 1
31 Key, Balance Piston CS03100-320 320*** 1
32 Snap Ring (External) NG12-100 S100 1
2201Q2JE-HO-S6-N_2015.06.
Chapter 7 Related Documents
SCV-series Screw Compressor 7.2 Parts Configuration Table 320V*D
7-20
P/N Part Name Code No. Remarks Q’ty.
33 Sleeve, Balance Piston CS03300-320H 320**H 1
34 Spring Pin NE3206-014 Φ6×14 1
35 O-ring PA12-190 JIS B 2401 G190 1
36 O-ring Spacer CS03600-320 320*** 1
37 Snap Ring (Internal) NG11-200 H200 2
38 Thrust Bearing CS03800-320 320*** 2
39 Lock Nut NG31-021 AN21 2
40 Lock Washer NG32-021 AW21 2
42 Spacer, Thrust Bearing Alignment CS04200-320 320*** 2
43 Thrust Bearing Gland CS04300-320 320*** 2
45 Hexagon Head Bolt NB15520-055 M20×55 8
46 Conical Spring Washer ND150-020 M20 1L 8
46 Lock Washer Set (old, plate type) CS0469-G 320*** 8p./set -
48 Retainer, Oil Seal CS04800-320VDS 320*** 1
48 Retainer, Oil Seal CS04800-320P 320*** with Seal pot 1
49 O-ring PA12-160 JIS B 2401 G160 1
50 Oil Seal CS05010-320VD SA1J 95×120×13 1
51 Seal Cover CS051000-320BBS 320*** BBS, BOS 1
52 Gasket, Seal Cover CS05200-320N 320*** 1
53 Hexagon Socket Head Cap Screw NB35416-040 M16×40 8
54 Unloader Slide Valve CS05400-320VSD 320VS* 1(VSD)
54 Unloader Slide Valve CS05400-320VMD 320VM* 1(VMD)
54 Unloader Slide Valve CS05400-320VLD 320VL* 1(VLD)
58 Hexagon Socket Head Cap Screw NB35412-055 M12×55 5
60 Unloader Cylinder CS06000-320V 320V*D 1
61 Hexagon Socket Head Cap Screw NB35420-050 M20×50 2
62 Hexagon Socket Head Cap Screw NB35420-110 M20×110 6
63 O-ring PA12-240 JIS B 2401 G240 1
64 Unloader Piston CS06400-320U 320*** 1
65 O-ring PA11-200 JIS B 2401 P200 1
66 Teflon Cap Seal CS06600-320 CAP-3BE200 1
67 Push Rod, Unloader Slide Valve CS0671-GV 320V*D 1
68 Guide Pin NE2506-016 Φ6×16 1
69 Lock Nut NG31-010 AN10 1
70 Lock Washer NG32-010 AW10 1
73 O-ring PA11-044 JIS B 2401 P44 1
74 Unloader Cover CS07400-320 320*** 1
75 O-ring PA12-210 JIS B 2401 G210 1
76 Hexagon Socket Head Cap Screw NB35416-040 M16×40 8
77 Indicator Cam CS07700-320VS 320VS* 1(VSD)
77 Indicator Cam CS07700-320VM 320VM* 320VL* 1(VMD)
1(VLD)
78 Ball Bearing CS07800-200 #6000 1
2201Q2JE-HO-S6-N_2015.06.
Chapter 7 Related Documents
SCV-series Screw Compressor 7.2 Parts Configuration Table 320V*D
7-21
P/N Part Name Code No. Remarks Q’ty.
79 Snap Ring (External) NG12-010 S10 1
80 Bearing Gland CS08000-200 200V** 1
81 Hexagon Socket Head Cap Screw NB35406-015 M6×15 3
82 V-ring CS08200-200B 20×10×12 VH10
NBR 1
83 Spring CS08300-200 200V** 1
84 Retainer, Indicator Cam Spring CS08400-200 200*** 1
91 Shaft Key CS09100-320 320*** 1
92 Suction Flange CS71400-P350 MYK350A 1
93 Gasket, Suction Flange CS09300-320N MYK350A 1
94 Hexagon Head Bolt NB12024-075 M24×75 16
95 Discharge Flange CS71400-P200 MYK200A 1
95 Discharge Flange CS71400-P200CD MYK200CD 1
96
Gasket, Discharge Flange (for the case V*G
model or V*D model used No.235) CR72000-200N MYK200A 1
97
Hexagon Head Bolt (for the case that is not
using No.235 Discharge flange spacer) NB12020-055 M20×55 12
97
Hexagon Head Bolt (for the case using
No.235 Discharge flange spacer) NB12020-085 M20×85 12
100 Mechanical Seal Assembly CS10000-320BE BOS-E1 -
100 Mechanical Seal Assembly CS10002-320EBS BBS-E 1
120 Unloader Indicator Assembly CS12000-200VXF 200V** 0-100% 1
125 Micro-Switch CS12500-200 200*** Z15GW 2
127 Micro-Switch Cam CS1279-200V 200VS\L 1
129 Wire wound type Potentiometer CS1299-E10 with Wires 1
129 Conductive Plastic type Potentiometer CS12919-E10 with Wires -
137 Indicator Dial CS13700-320VD 320V*D 1
150 O-ring PA12-220 JIS B 2401 G220 2
166 Hexagon Socket Head Cap Screw NB35405-010 M5×10 4
215
Flange, Lubricating Oil inlet (Journal)
without hole CS71400-040 MYK40A 1
216 Gasket, Lubricating Oil inlet Flange CR72000-040N MYK40A 1
217 Hexagon Head Bolt NB14012-040 M12×40 4
218 Flange, Oil Injection with hole CR74000-025 MYK25A 1
219 Gasket, Oil Injection Flange CR72000-025N MYK25A 1
220 Hexagon Head Bolt NB14012-035 M12×35 4
235 Spacer, Discharge Flange
(This spacer is not necessary for CD flange.) - 320*** 1
236 Gasket, Discharge Flange Spacer CS23600-320N 320*** 1
237 Torsional Slip Washer CS23700-320 125～400 2
250 Thrust Washer CS25000-320 320*** 2
251
Electromizer (Economizer) Flange without
hole CS71400-080 MYK80A Male 1
251 Electromizer (Economizer) Flange with hole CR74000-080 MYK80A Male 1
252 Gasket. Electromizer (Economizer) Flange CR72000-080N MYK80A 1
253 Hexagon Head Bolt NB15520-055 M20×55 4
254 Liquid Injection Flange without hole CS71400-050 MYK50A Male 1
2201Q2JE-HO-S6-N_2015.06.
Chapter 7 Related Documents
SCV-series Screw Compressor 7.2 Parts Configuration Table 320V*D
7-22
P/N Part Name Code No. Remarks Q’ty.
254 Liquid Injection Flange with hole CR74000-050 MYK50A Male -
255 Gasket, Liquid Injection Flange CR72000-050N MYK50A 1
256 Hexagon Head Bolt NB15516-045 M16×45 4
267
Special Spring Washer, Hexagon Socket
Head Cap Screw ND330-12 M12 5
289 Variable Vi auxiliary Slide Valve CS28900-320VSD 320VS* 1(VSD)
289 Variable Vi auxiliary Slide Valve CS28900-320VMD 320VM* 1(VMD)
289 Variable Vi auxiliary Slide Valve CS28900-320VLD 320VL* 1(VLD)
326 O-ring Gland CS32600-320 320*** 1
420 Spacer, Unloader Positioning CS42000-320VSD 320VS* 1(VSD)
420 Spacer, Unloader Positioning CS42000-320VMD 320VM* 1(VMD)
420 Spacer, Unloader Positioning CS42000-320VLD 320VL* 1(VLD)
421 O-ring PA11-058 JIS B 2401 P58 2
432 O-ring PA12-165 JIS B 2401 G165 4
433 O-ring PA12-165 JIS B 2401 G165 4
444 Vi Adjusting Rod CS44400-320VSD 320VS* 1(VSD)
444 Vi Adjusting Rod CS44400-320VMD 320VM* 1(VMD)
444 Vi Adjusting Rod CS44400-320VLD 320VL* 1(VLD)
446 Vi Square Washer, Teflon Bushing CS44600-250VD 250V*** 1
448 Teflon Bushing CS44800-320VD 320V*D 1
449 Thrust Washer CS44900-320VD 200V** 2
450 O-ring PA11-044 JIS B 2401 P44 2
451 O-ring PA11-050A JIS B 2401 P50A 1
452 Hexagon Socket Head Cap Screw NB35406-020 M6×20 1
453 Hexagon Nut NC140-36 M36 1
458 1 Plug NF06-015 R1/2 1
458 2 Plug NF06-004 R1/8 2
458 3 Plug NF06-008 R1/4 1
459 Plug NF06-015 R1/2 1
522 Domed Cap Nut NC921-36 M36 1
523 O-ring PA11-050A JIS B 2401 P50A 1
528 Oil Seal Sleeve CS52810-320VD 320*** 1
528 Oil Seal Sleeve with O-ring CS52809-320VD 320*** 1
529 Set screw NA83606-010 M6×8 2
533
Spring Washer, Hexagon Socket Head Cap
Screw ND330-06 M6 1
599 Guide Pin NE3206-016 Φ6×16 1
600 Retainer, Vi adjusting Rod CS60000-320VD 320V*D 1
601 Flange, Lubricating Oil inlet (F Rotor side) CR74000-020 MYK20A 1
602
Gasket, Lubricating Oil inlet (F Rotor side)
Flange CR72000-020N MYK20A 1
603 Hexagon Head Bolt NB14012-035 M12×35 2
604 Vi Adjusting Rod Washer ND160-036 JIS B 1256 36 1
605 Plug NF06-032 R1 1/4 1
607 A Plug NF06-004 R1/4 1
2201Q2JE-HO-S6-N_2015.06.
Chapter 7 Related Documents
SCV-series Screw Compressor 7.2 Parts Configuration Table 320V*D
7-23
P/N Part Name Code No. Remarks Q’ty.
607 B Plug NF06-004 R1/4 1
680 A Conical Spring Washer, Vi Adjusting Rod ND160-036 M36 1
680 B Conical Spring Washer, Vi Adjusting Rod ND160-036 M36 1
715 Cover Plate, Liquid injection Flange CS71500-025 MYK25A 1
744 O-ring PA12-090 JIS B 2401 G90 1
 The part code of the O-ring is the one assigned to NBR which is standard material.
When the material of the O-ring is other than NBR, a different part code is used for
each material.
If you are using O-rings made from other than the standard material, please contact
MAYEKAWA when placing an order.
 The Code No. of parts shown in parentheses below is applied to the product until the
end of November, 2014:
(P/N 120 Unloader Indicator Assembly, P/N 125 Micro-Switch, P/N 129 Potentiometer)
 For the Code No. of new type indicator part, refer to the separately dedicated
Instruction manual for it.
2201Q2JE-HO-S6-N_2015.06.
Chapter 7 Related Documents
SCV-series Screw Compressor 7.3 Tightening Torques for Bolts and Nuts
7-24
7.3 Tightening Torques for Bolts and Nuts
7.3.1 Hexagon Head Bolts
Table 7-5 Hexagon Head Bolts Used and Each Tightening Torque
P/N Tightening Location
Nominal Designation x Length mm (Qty)
Tightening Torque N･m
160V 200V 250V 320V
45 Thrust Bearing Gland
M10x30 (8)
40
M12x35 (8)
50
M16x45 (8)
60
M20x55 (8)
120
94 Suction Flange
M20x55 (8)
140
M22x55 (8)
160
M24x65 (12)
200
M24x75 (16)
200
97
Discharge
Flange
CD
type
Sideways
discharge
M22x55 (4)
160
M20x55 (8)
140
M22x55 (8)
160
M20x55 (12)
140
A
type
Sideways
discharge
M22x80 (4)
240
M20x80 (8)
140
M22x85 (8)
160
M20x85 (12)
140
Downward
discharge
M22x55 (4)
160
M20x55 (8)
140
M22x55 (8)
160 ―
217 Lubricating Oil inlet Flange ―
M12x35 (2)
40
M12x35 (4)
40
M12x40 (4)
40
218 Oil Injection inlet Flange ― ― ―
M12x40 (4)
40
253 Economizer inlet Flange
M12x35 (4)
40
M12x40 (4)
40
M16x45 (4)
110
M20x55 (4)
140
256 Liquid Injection inlet 1 Flange
M12x35 (2)
40
M12x35 (4)
40
M12x40 (4)
40
M16x45 (4)
110
603 Lubricating Oil inlet
(F Rotor side) Flange ― ― ―
M12x35 (2)
40