These durable, carbon-steel-bodied valves are a combination stop valve and normally-spring-closed check valve. Valves open wide for full flow in the arrow direction on the valve body and promptly reseat when reverse flow occurs. Stainless steel valve stems facilitate positive manual closing while Teflon disc seats assure reliable, long-life seating. Use of these combination valves reduces pressure drop, minimizes space requirements, and simplifies installation.

These flanged, heavy-duty, piston-type check valves control the flow of refrigerant. Valves open wide for flow in the direction of the arrow on the valve body. Valves close tight when flow reversals occur. The piston design minimizes pulsations. Valves open when inlet pressure exceeds outlet pressure (1 psid [.07 bar] minimum), thereby lifting the piston/seat assembly and allowing flow through the valve. When inlet pressure and outlet pressure are equalized, the weight of the piston/seat assembly causes the valve to close. If outlet pressure exceeds inlet pressure, the outlet pressure acting on top of the piston/seat also helps seat the valve closed.

The HCK4 series of dependable, compact, rugged in-line check valves (disc type non-return valves) is ideally suited for refrigerant flow control applications. Valves open wide for flow in the arrow direction on the valve body. Valves close quickly and reliably when flow reversals occur. Plated bodies and stainless steel seat discs and springs enable them to withstand expected industrial refrigeration conditions. Furthermore, these check valves can be mounted in any position and close coupled to other valves.

The HCK4 “L” series of in-line gravity drain check valves are dependable, compact, and rugged. The HCK4 “L” gravity drain check valves feature a low wide-opening pressure differential suitable for liquid transfer systems and other low-pressure-drop applications. In addition, an optional, specially-designed adapter allows direct replacement of existing 3” and 4” Wolf-Linde gravity drain check valves without repiping.

The liquid refrigerant filter system features a filter construction that removes much smaller dirt particles than conventional liquid strainers (extra fine 120 mesh). The "brains" of the filter system monitor the pressure drop across the filter and can alert the operator when the filter needs cleaning. The fully-assembled and tested filter system comes complete with the valves and controls needed to quickly and safely pump-out the filter system for