MAYEKAWA 4M - Compressor Specifications; Service Limits and Operating Ranges

Reciprocating Compressor M Series
2-6
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
Refrigerant
䋭
NH
3
Number of cylinder ± 4 6 8
Cylinder diameter mm(Inch) 146(5.75)
Stroke mm(Inch) 106(4.17)
Designed pressure of high
pressure section
MPaG(PsiG) 3.0(435)*
Designed pressure of low
pressure section
MPaG(PsiG) 2.0(290)
Withstanding pressure of high
pressure section
MPaG(PsiG) 4.5(653)*
Withstanding pressure of low
pressure section
MPaG(PsiG) 3.0(435)*
Air tightness of high pressure
section
MPaG(PsiG) 3.0(435)*
Air tightness of low pressure
section
MPaG(PsiG) 2.0(290)
Minimum rotation rpm 900
Maximum rotation rpm 1500
V-belt ± C x 8 or 10 / 8V x 4 or 5 or 6 (Optional)
Displacement (at maximum
rotation)
m
3
/h(CFM) 639(376.1) 958(564.1) 1278(752.1)
Capacity control range
䋦 100,50,䋨0䋩
100,66,33,(0) 100,75,50,25,(0)
Refrigerant Oil
䋭
Refer to "4.1 Refrigerant Oil".
Oil filling amount Ɛ 32 38 44
Mass of the product
kg(lbs) 1300(2867) 1580(3484) 1830(4035)
Remarks
The above values include the weight of water cooling head
cover, oil cooler, and flywheel.
*Please check with local Mayekawa/Mycom branch. Different shutoff valves are used in different locations. Do not exceed
rating of shutoff valves even if compressor rating is greater.
IE. North America uses Mayekawa shut off valves which are rated at 2.16MPaG (313 PsiG)
2.2.2 Service Limits and Range
Table 2-2 Service limits of compressor (not including suction/discharge valves)
Item Limit value Remarks
Maximum discharge pressure 2.6MPaG(377 PsiG)*
North America MDP is 1.96MPaG(284
PsiG)
Maximum suction pressure 0.8MPaG(116 PsiG)
Maximum differential pressure (top and
bottom)
2.0MPa(290 Psi)
Maximum oil supply pressure Ps+0.4MPa(58 Psi) Ps = Suction pressure
Minimum oil supply pressure Ps+0.1MPa(14.5 Psi) Ps = Suction pressure
Minimum evaporation temperature -30°C(±22°F)
Maximum discharge temperature 160°C(320°F)
Maximum oil supply temperature 60°C(140°F)
Minimum oil supply temperature 30°C(86°F)
Maximum rotation 1500 rpm
A region: When the evaporating
WHPSHUDWXUHLV7H15°C(59°F)