Primary Fluid Systems manufactures plastic back pressure valves for enhancing the accuracy of metering pumps.

JV Vissers Sales Corp. supplies diaphragm, high flow, and T-Series back pressure valves.

Pentair distributes pressure relief valves manufactured by Anderson Greenwood, Crosby, and Varec. These valves come in direct, spring-operated, and pilot-operated configurations.

Shanghai Qiuyi Valve offers two-way/high pressure solenoid valves. These valves can handle pressures ranging from 0 to 16 MPa, operating temperatures up to operating up to 180C, and +/-10% voltage ratings. They come in sizes ranging from DN1 to DN25, body lengths ranging from 44 to 90mm, and a stainless steel construction.

Lesman Instrument Company offers Asco Series 8223 high pressure/2-way solenoid valves. These valves are commonly used for pipe sizes ranging from 1/4" to 3/4" NPT, and they can handle pressures up to 1500 PSI. They feature a rugged piston construction and are available in normally open/closed states.

Metex provides ASCO high pressure 2-way valves for water applications. These valves come in sizes ranging from 1/4" to 3/4", and they can handle pressures ranging from 450 to 1500 PSI. They have an angled body design, a pilot operated/normally closed construction, and a variety of mounting options.

TIP Valve offers high pressure and temperature butterfly valves for water, vapor, acid, soda, and saline applications. These valves feature nominal diameters ranging from DN80 to DN2200 and pressure scopes ranging from 0.6 to 10 MPa.

Cameron offers WKM DynaCentric high performance butterfly valves in carbon steel, stainless steel, lug, or wafer body configurations. These valves come in sizes ranging from 2.5" to 36" and pressure classes ranging from 150 to 600. Applications include chemical/petrochemical processing, marine , oil/gas production, etc.

Johnson Controls offers VF Series high pressure/temperature butterfly valve assemblies. These valves are compatible with ANSI 150/300 slip-on/weld-neck flanges, they feature bi-directional shut-offs, and can handle pressures up to 550 PSIG @ 250°F.

Peter Paul Electronics offers two-way/normally open, two-way/normally closed, and three-way/normally closed high pressure valves. Three-way/normally closed high pressure valves can handle burst pressures up to 5000 PSI and operating temperatures up to 221°F. These valves have air, non-corrosive gas, water, and oil applications.

WellMark manufactures diaphragm back pressure valves for Lact unit, treater, and separator applications. These valves can also be used as pressure relief valves.

Cat Pumps manufactures high pressure industrial valves intended to provide pump/system protection, regulate pump performance, and enhance the flexibility of a pump system. The company's family of high pressure industrial valves include pressure regulators, pressure unloaders, and secondary relief valves.

Marcuse & Son is a supplier of Conrader-brand safety valves, which protect compressed air systems from over-pressurization. The valves are offered with hard or soft seats.

Aerocon offers high pressure solenoid valves manufactured by Lake Products and Circle Seal Controls. Circle Seal valves  feature a normally open construction, VAC ratings up to 115, and 1/4" NPT fittings. Lake Products valves can handle pressures ranging from 1,000 to 2,400 PSI.

Danfoss makes offers EV224B servo operated 2/2-way high pressure solenoid valves. These valves feature working pressure ratings up to 40 bar, medium temperatures up to 60°C, and a built-in pilot filter.