Check Valve - Piston Type (Hansen)
These flanged valves (20-100ND) prevent reversal of flow of refrigerant in discharge, hot gas, liquid and suction lines. Suitable for where constant pulsing pressure applications occur from compressors or pumps and where a manual opening of the valve is required.
Valves are fully open with a pressure drop in excess 7kPa and when equal pressure on inlet and outlet of the valve occurs, the weight of the piston/seat assembly causes the valve to close to prevent reverse flow. Sizes 20ND through to 32ND have spring assist closing. Sizes 20mm to 150mm ports, weld in body also available.
Hansen Flanges to suit and Hansen Strainer range if required.
Also see HCK4 type compact spring closing type for non pulsing applications, and Stop/Check valve range with manual closing valve function.
See Hansen HCK1, HCK1W Bulletin C449c
HCK1 Refrigerant Valve Capacity Tables for Ammonia
Alternative RFF check valve or RFF Stop/Check valve range with Butt Weld connections.
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