OPERATION MANUAL Sumitomo Heavy Industries, Ltd.
SRDK Series CRYOCOOLER 20
2-4 SITE REQUIREMENT
2-4-2 REQUIRED FOR WATER COOLED COMPRESSOR UNIT
・An almost level and even area in the field will be selected to install the Compressor Unit.
・An area to be influenced by splashing water and/or dusts will not be selected to install the Compressor
Unit.
・A clean environmental condition without dirt and/or free from an exhausted heat will be selected to install
the Compressor Unit in the field.
・A quality of cooling water will be secured to use for an appropriate cooling of the Compressor Unit.
・Any heat sensitive object cannot be positioned on surroundings of the Compressor Unit.
AMBIENT TEMPERATURE CONDITION
The ambient temperature must be between 5 deg.C (41 deg.F) and 28 deg.C (82.4 deg.F) to get the
specified cooling capacity. The system can operate up to 35 deg.C (95 deg.F) with less than 5%
cooling capacity down. The maximum relative air humidity is 85%RH.
HELIUM SUPPLY SYSTEM
A helium supply system is necessary if you need to decontaminate the helium gas, or charge the
helium gas that has leaked out of the system. A helium supply system includes a Grade 5 (99.999%
up pure) helium gas bottle, a regulator, an outlet valve, and a charging hose or equivalent delivery line.
POWER SOURCE
Ensure the correct AC power source is available for the Compressor Unit. See “TECHNICAL
INSTRUCTION” of Compressor Unit used, for AC power source requirement.
COOLING WATER
Ensure the correct cooling water is available for the Compressor Unit. See “TECHNICAL
INSTRUCTION” of Compressor Unit used, for the cooling water requirements.
ANTIFREEZE
Operating with Antifreeze (50/50 % mixture of water and ethylene glycol), the flow rate shall be 10%
larger than water flow rate and the pressure drop through the cooling water line will be 40% larger.
The larger circulating pump will be required for the Antifreeze. The admissible capacity range for
circulation pump will be more than 8 liter/min (2.1 gal./min) for flow rate and 0.29 MPa (3 kgf/cm
2
G, 42
psig) for the pressure drop.
SAFETY / SEISMIC REQUIREMENT
Secure to lock the locking device of compressor castor.
SERVICE AREA
The Compressor Unit should have enough space as shown in “TECHNICAL INSTRUCTION” of
Compressor Unit used.
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