Refrigerating Specialties A4W Adaptomode Weld-End Pressure Regulators

These heavy duty, cast steel bodied (ASTM No. A352 Grade LCB), pressure regulators weld directly in the line and do not require flanges. They are used for control of Ammonia, R-12, R-22 and R-502, and other common refrigerants, certain oils and other fluids approved for use in refrigeration systems. The A4W Series Regulators are pilot operated, using upstream pressure for the moving force, and require a minimum 0.14 bar (2 psi) pressure drop to fully open. The basic Type A4W is an Inlet Pressure Regulator which tends to open on a rise in upstream pressure above set-point and to close on a drop in pressure below set-point. These valves can be ordered with the Type RSW Strainer to be welded directly to the inlet of any of the Type A4W Regulators or use a 13mm (1/2") Type RSF Strainer in only the pilot circuit of a Type A4WE or A4WR version of the regulator. The A4W Series of regulators uses the same Modules as does the A4A Series to configure many possible variations.

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