Sumitomo SRDK Series - Cold Head Installation

OPERATION MANUAL Sumitomo Heavy Industries, Ltd.
SRDK Series CRYOCOOLER 21
2-5 COLD HEAD INSTALLATION
2-5 COLD HEAD INSTALLATION
<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.
Do not break the vacuum with the low temperature of cold head second stage when removing
the cold head from the vacuum chamber. Breaking the vacuum may result in serious damage,
explosion or escape of gas. Keep the Flex Lines connected and maintain the high vacuum of
the chamber and wait until the cold head second stage temperature rises up to 100K before
removing the cold head.
<Caution against misoperation>
Be extremely careful not to damage the cylinder when mounting the cold head. Damaging the
cylinder may result in misoperation or malfunction.
The following procedures describe the inspection and installation of the Cold Head.
INSPECTION
Inspect the following parts of the Cold Head before installation for evidence of damage:
(1) Overall exterior.
(2) Bent or dent of cylinder.
(3) Supply and Return Aeroquip fittings.
(4) Cold Head power connector.
(5) Mounting flange and its sealing surface.
(6) Sealing surface or O-ring groove of User’s vacuum chamber.
INSTALLATION
The Cold Head can be mounted in any desired position and orientation.
Install the Cold Head into User’s cryostat or vacuum chamber with a prudent care.
CAUTION
WARNING