The complete line of modular Pressure Regulators has been designed for simple, reliable operation. Available in 3/4" through 6" (20 mm through 150 mm) port sizes, these Pressure Regulators use a series of easily-changed, screw-in control modules (pilots) to determine regulating function. Other features include strong ductile iron or steel bodies, disc-pistons with Teflon seal rings to overcome the problems associated with dirt and dry running systems, reliable Teflon seats, V-port modulation for finer control, stainless steel closing springs, manual-opening stems, and 1/4" NPT gauge ports. These regulators replace R/S model A4A using the same flanges and spacing.

Applications include evaporator pressure control, defrost pressure control, receiver pressure control, hot gas bypass regulation, suction pressure control, air or liquid temperature regulation, and internal system pressure relief. Shipped assembled and 100% tested.