40mm Self-Equalizing Gas-Powered, Two-Step Suction Stop Valve without Flanges

These heavy-duty, gas-powered, 2-step suction stop valves are designed to control the flow of refrigerant in large industrial and commercial refrigeration systems. They remain normally open via a spring and require no pressure drop to operate. A single pilot solenoid valve is required to control a higher-pressure refrigerant gas which closes these valves during defrosting. The HCK5D valve has an internal, controlled bleed-down (equalize) feature which will not allow the main seat to open until the pressure across the valve is at a lower, safer pressure differential. This eliminates the need for a separate bleed-down solenoid valve, greatly simplifying piping and reducing installed costs. If a loss of power occurs during defrost, evaporator pressure is utilized to keep the main valve seat closed until bleed-down is complete.

The HCK5D valve is ideally suited for positive closure of suction, liquid overfeed, and flooded evaporator gas return lines during defrost in low temperature applications. These valves can be installed in horizontal or vertical lines and are best installed on their sides for improved conveyance of liquid and oil. Because they are gas-powered to close, the valves operate reliably even under viscous oil conditions. They are suitable for Ammonia, Halocarbons, CO2 and other Hansen approved refrigerants and gases.

Sizes range from 40mm to 100mm. Only one solenoid pilot valve is required for product and the valve can be a direct swap for the normally open gas-powered suction stop valve (HCK2).

The solenoid pilot valve and flanges are not included with the product and must be purchased separately.