MAYEKAWA 8M - Specification of Compressor; Specification

2202G1JE-DA-M-N_2010.01.
2 Configuration and Specification of Compressor
Reciprocating Compressor M Series 2.2 Specification of Compressor
2-7
2.2 Specification of Compressor
2.2.1 Specification
Table 2-1 Specification of compressor body (not including suction/discharge valves)
Item Unit 4M 6M 8M 62M
Refrigerant – NH
3
Number of cylinder – 4 6 8
Low stage: 6
High stage: 2
Cylinder diameter mm 146
Stroke mm 106
Designed pressure of
high pressure section
MPaG
3.0
*1
（2.0）
*2
Designed pressure of
low pressure section
MPaG 2.0
Hydrostatic test
pressure of high
pressure side
MPaG
4.5
*1
（2.0）
*2
Hydrostatic test
pressure of low
pressure side
MPaG 3.0
Pneumatic test
pressure of high
pressure side
MPaG
3.0
*1
（2.0）
*2
Pneumatic test
pressure of low
pressure side
MPaG 2.0
Minimum rotation rpm 800
*3
Maximum rotation rpm 1500
*3
V-belt – 4—6 Type: 8V (Optional)
Displacement
(at maximum rotation)
m
3
/h 639 958 1278
Low stage: 958
High stage: 320
Capacity control range
％ 100,50,（0）
100,66,33,(0) 100,75,50,25,(0) 100,66,33
Refrigerant Oil – Refer to "4.1 Refrigerant Oil".
Oil filling amount
ℓ
32 38 44 44
kg 1300 1580 1830 2000 (2700)
*4
Mass of the product
Remarks
The above values include the weight of water cooling head cover, oil cooler,
and flywheel.
*1: Pressure values for cases and covers.
*2: Pressures for
genuine shut-off valve.
*3: Rotation speed range will change depending on driving condition. Refer to the service range.
*4: For over hang motor specification (140 kW), see the value in parentheses.
Table 2-2 Specification of motor
Item Unit 75kW 90kW 140kW
Rated output kW 75 90 140
Voltage V 220 or 440 440
Frequency Hz 50 or 60
Number of poles – 6
Type – Drip-proof case type (exclusive flange)