Sumitomo HC-4A - Flow Diagram

PRINCIPLES OF OPERATION
9
The compressor continuously draws low-pressure helium from the system return line.
It compresses, cools and cleans the gas, then delivers it through the system gas supply line
to the cold head. See Figure 1.
1.
Oil Injection Filter
12.
Gas Equalization Solenoid Valve
2.
Oil Injection Orifice
13.
Gas Supply Coupling
3.
Heat Exchanger
14.
Gas Return Coupling
4.
Compressor Capsule
15.
Temperature Switches (oil, gas
and compressor shell)
5.
Oil Separator
16.
Internal Relief Valve
6.
Oil Capillary Filter
17.
Helium Pressure Relief Valve
7.
Oil Capillary
18.
Coolant Pressure Relief Valve
8.
Adsorber
19.
Circulator
9.
Internal By-pass Orifice
20.
Accumulator
10.
Surge Bottle
21.
Air Heat Exchanger
11.
Gas Supply Pressure Gauge
22.
Fan
Figure 1 HC-4A Zephyr
®
Series Flow Diagram