Oil pressure regulator A4 series

ammoniadiaphragmsingle-stage

The Type A4AD is a Dual Inlet Pressure Regulator capable of regulating at two different pressure set-points. Parker’s A4AD pressure regulator features dual pressure regulating pilots in a single housing which allows users to control two different pressure set points without the need for additional piping, valves, or controls. The active pressure regulating pilot is selected using a standard pilot solenoid. This simple control gives users flexibility in their process but keeps implementation costs to a minimum. The A4AD is part of the popular A4A line and features common components and service parts. Features and Benefits: • Pilot Operated characterized Modulating Plug for precise control • Suitable for all common refrigerants and oil • Flanges for threaded or welded steel pipe and copper tube (copper not for ammonia) • Unique modular construction • Interchangeable parts • Easy to service • Close coupled strainers, optional • Many control variations are possible with the use of a few modules and kits • Stainless Steel diaphragm • Chrome plated Pilot Seat • Manual Opening Stem Application: • Capacity Control of an evaporator at two different pressure levels to regulate temperature • Evaporator Pressure Control combined with Defrost Pressure Relief