HCK5DW Hansen Suitable for Ammonia, R22, R134a, CO2 and other approved refrigerants

These heavy-duty, durable, ductile iron or cast steel body, gas-powered suction stop valves are designed to control the flow of refrigerant in large industrial and commercial applications. 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 evaporator defrosting. If an electrical power failure occurs during the hot gas step of a defrost cycle, the auxiliary pressure pilot valve will keep main valve seat closed until pressure inside evaporator is reduced to the pressure setting on the pilot.

Applications

These valves are ideally suited for low temperature applications to positively close, during defrost, the following: suction lines, liquid overfeed and flooded evaporator gas return lines, as well as gravity liquid and gas lines. Because they are gas-powered to close, these valves operate reliably even under viscous oil conditions. They meet the requirements for “suction stop valves having delayed main valve opening” when specified. Their rated suction vapor capacities are equal to Hansen type HCK2/HCK2W and therefore are ideal for retrofitting existing valves in the field. These valves are suitable for ammonia, R22, R134a, CO2 and other approved refrigerants

Features:

• Strong cast steel or ductile iron body
• Delayed opening in case of power failure
• Standard solenoid coil; no special coil required
• Adjustable opening pressure setting
• No pressure drop required to open
• Tough ductile iron piston
• Easy to install and insulate
• Teflon® piston seal ring
• Durable metal-to-metal seating
• Pilot line strainer and disc strainer/orifice
• Safe Working Pressure 400 psig (27 bar), 600 psig (40 bar) for CO2
• Pilot valve assembly included for all sizes