2200Q2JE-HO-KHM-N_2015.02.
Chapter 2 Product Specifications and Structure
Ammonia Semi-hermetic Motor with K-series Compressor 2.3 Product Specifications
2-4
2.3.2 Service Limits
Table 2-2 Service Limits for the K-series Compressor
Item Unit Limit value Remarks
Maximum discharge
pressure
MPa 2.26
Design pressure of a crankcase
and covers:
High pressure part: 26MPa
Low pressure part: 1.5MPa
Maximum suction
pressure
MPa 0.69
Maximum
differential pressure
at high/low pressure
MPa 1.96
Maximum oil supply
pressure
MPa Ps + 0.4
Ps = Suction pressure
Recommend settings:
Ps + 0.2 MPa to 0.3 MPa
Minimum oil supply
pressure
MPa Ps + 0.1
Maximum discharge
gas temperature
°C 140
Maximum supply oil
temperature
°C 50
Temperature at oil chamber or
temperature at oil cooler inlet port
Minimum supply oil
temperature
°C 30
Maximum speed min
-
1800
Minimum speed min
-
900
Maximum cooling
water outlet
temperature
°C 50
Head jacket cover and oil cooler
outlet temperature
Allowable temperature of blade
hose for cooling water
Maximum cooling
water pressure
MPa 0.5
Allowable pressure of blade hose
for cooling water
Degree of
superheat: SH
°C 20 or less Liquid flow-back is not allowed.
■ Unless otherwise specified, the pressure unit "MPa" represents the gauge pressure in this
manual.
■ In the case of ammonia refrigerant, when SH is too high, it is easy to occur to decline of the
volumetric efficiency of the compressor due to overheating of the discharge gas. We
recommend 10 °C
to 15 °C as SH.
■ Refer to the "Reciprocating Compressor K-series Instruction Manual" Section 4.3.1
"Start/Stop Limits" for the limitations (start and stop limits) to be applied when the running
compressor is stopped and restarted.
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