Our standard Minimum Pressure Valves come in three body types:
Threaded  * SAE Flange ANSI FlangeCartridge


The minimum pressure valve will prevent a portion of a pressure system from dropping below a set minimum pressure. Initially, as inlet pressure builds, the valve will open at a preset opening pressure allowing pressure to build throughout the system. When pressure at the outlet is reduced enough, the valve closes to maintain pressure at the inlet. An independent check valve prevents back flow.

In a rotary screw air compressor, the minimum pressure valve maintains a minimum pressure in the air-oil separator. At start-up, the valve is closed to build initial pressure. At normal operating pressures, the valve is full open for minimal pressure loss. In addition, this valve has a independent poppet type check valve to prevent back flow at shut down.

Air-Con Oil and Gas Applications

Minimum Pressure Valves

MP – Threaded

MP – SAE (ISO 6162) Inlet/Outlet Flange

MP – ANSI (Class 300, Class 150) Inlet/Outlet Flange

MP – Cartridge

More Info – 3/4″ Cartridge Valve

Pipe Size3/4″
Rated Flow (scfm)90

More Info – 1-1/4″ Cartridge Valve

Pipe Size1-1/4″
Rated Flow (scfm)200

More Info – 1-1/2″ Cartridge Valve

Pipe Size1-1/2″
Rated Flow (scfm)350

More Info – 2″ Cartridge Valve

Pipe Size2″
Rated Flow (scfm)575