OPERATION MANUAL Sumitomo Heavy Industries, Ltd.
SRDK Series CRYOCOOLER 24
2-7 CONNECTING FLEX LINES
2-7 CONNECTING FLEX LINES
<Warning about explosion, escape of gas>
This cryocooler (cold head, compressor unit, compressor adsorber, flex lines) contains a high-
pressure (about 1.62 MPa (16.5 kgf/cm
2
G, 235 psig)) helium gas sealed in. Hitting the
equipment with a sharp edge or touching it with a pointed object may cause explosion or escape
of gas. Handle the equipment with extreme care.
The minimum bending radius of the flex lines is 300 mm (11. 81 inches). Bending the flex lines
at a smaller angle may cause explosion or escape of gas, and so this should be avoided.
<Caution against misoperation>
Be sure to check the flat rubber gasket of the self seal coupling of the cold head and compressor
unit for dirt, dust or to see whether the flat rubber gasket is attached correctly, before connecting
the flex lines. Connecting the flex lines with an abnormal flat rubber gasket setting may cause
escape of gas.
Be sure to start with the flex line on the "Return" side when connecting the flex lines to the cold
head. Starting with the flex line on the "Supply" side may cause misoperation.
“IMPORTANT”
When connecting the flex lines, tighten the self-seal coupling nut by hand at the first turn and finally
tighten it firmly using 3 wrenches. However, be careful not to tighten it excessively. The maximum
allowable tightening torque is 45 N
･
･･
･
m.
Make the connections between the Cold Head and Compressor Unit as follows;
WARNING
CAUTION
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