Check valves
Failure to return or non-return valves can be found in the following positions:
- Reversible heat pump circuit protection to prevent the flow through the expansion valve is not one cycle
- Hot gas network to prevent gas entering another evaporator
- When multiple compressors discharge in one capacitor, for prevention of condensation of fluid back in idle compressor
- Where two or more evaporators work at different pressures, to prevent suction gas supplied in the cold
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