Compressor Unit Instruction Manual
ULVAC CRYOGENICS INCORPORATED 3-5
3.4 Connecting the Super Trap (Refrigerator Unit) to the Compressor Unit
(Connecting Flexible Hose) (Connecting Flexible Hose)
・Read the handling notes in appendix C about the connection of the flexible hoses. ・Read the handling notes in appendix C about the connection of the flexible hoses.
・When connecting flexible hoses, always use two single open end spanners with width ・When connecting flexible hoses, always use two single open end spanners with width
across flat 26mm and 30mm. across flat 26mm and 30mm.
・Do not forcibly bend flexible hoses. They may be damaged and cause helium leakage. ・Do not forcibly bend flexible hoses. They may be damaged and cause helium leakage.
・Do not connect or disconnect self-sealing coupling frequently. It may cause gas leakage. ・Do not connect or disconnect self-sealing coupling frequently. It may cause gas leakage.
If there is a leakage, you may have to replace it with a new one according to the
situationof the occurrence of leakage.
If there is a leakage, you may have to replace it with a new one according to the
situationof the occurrence of leakage.
１．Remove all dust plugs and caps from supply and return flexible hoses, compressor
unit and super trap(refrigerator unit).Clean flat rubber gaskets on the
self-sealing couplings to be free from dust or metallic powder.
１．Remove all dust plugs and caps from supply and return flexible hoses, compressor
unit and super trap(refrigerator unit).Clean flat rubber gaskets on the
self-sealing couplings to be free from dust or metallic powder.
２．Connect the flexible hoses between the compressor unit and the super
trap(refrigerator unit) as follows (see Figure 3-3):
２．Connect the flexible hoses between the compressor unit and the super
trap(refrigerator unit) as follows (see Figure 3-3):
a. Connect the helium-gas supply flexible hose to the helium-gas supply
connector on the compressor unit. Connect the helium-gas return flexible
hose to the helium-gas return connector on the compressor unit.
a. Connect the helium-gas supply flexible hose to the helium-gas supply
connector on the compressor unit. Connect the helium-gas return flexible
hose to the helium-gas return connector on the compressor unit.
b. Connect the helium-gas supply flexible hose to the helium-gas supply connector
on the super trap(refrigerator unit). Connect the helium-gas return flexible hose
to the helium-gas return connector on the super trap(refrigerator unit).
b. Connect the helium-gas supply flexible hose to the helium-gas supply connector
on the super trap(refrigerator unit). Connect the helium-gas return flexible hose
to the helium-gas return connector on the super trap(refrigerator unit).
３．Check the helium gas pressure on the compressor unit. The standard filling pressure
is 1.2±0.04MPaG
３．Check the helium gas pressure on the compressor unit. The standard filling pressure
is 1.2±0.04MPaG
at20℃.Refer to Figure 3-4.If the pressure is higher than the
specified value, pull out the helium gas by opening the gas charge valve slowly. If the
pressure is lower than the specified value, charge helium gas as described in Section
6.3 in this manual.
Do not operate the compressor unit when helium gas is overcharged (exceed 1.24 MPaG at
20℃ room temperature).
CAUTION
CAUTION
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