Our check valves are built to allow flow in one direction only, automatically closing to prevent reverse flow the moment forward pressure drops or reverses. Unlike valves that need a handle turned or an actuator signal, check valves operate entirely on the mechanics of flow and pressure differential no manual intervention, no external control needed. We manufacture this range in two configurations to match different pressure classes and service conditions: 300 Series and 400 Series.
Every valve is machined to precise tolerances and individually pressure-tested before dispatch, because a check valve that allows even minor backflow can undo the entire purpose of the system it's protecting whether that's a pump, a compressor, or a sensitive instrumentation line.
In a check valve, a disc or a ball, or any other closing member is seated on the seat inside the valve, being retained at that position by the difference in pressure across the valve. With the desired forward flow through the valve, the closing member is pushed away from its seat by pressure, permitting the media to flow through it easily. When the flow ceases or even tries to go backward, the difference in pressure acts to push the closing member firmly on its seat.
This self-actuating behavior is what makes check valves so valuable in systems where backflow could damage equipment upstream a pump running dry because fluid drained backward through it, or a compressor taking on reverse pressure it was never designed to handle. The valve reacts to the physics of the system automatically, without waiting for anyone to notice and intervene.
300 Series, 400 Series
Self-actuating closing element (disc/ball) responding to flow direction and pressure differential
Machined from selected material grades suited to instrumentation and process service
Individually pressure-tested before dispatch
Manufactured under ISO 9001:2015 certified processes
Pressure and temperature ratings vary by series and material grade our team can confirm exact figures for your application.
A check valve that leaks even slightly in the reverse direction isn't really doing its job it's just delaying the problem it was installed to prevent. We manufacture our 300 Series and 400 Series check valves with tight tolerance control on the seat and closing element fit, verified through individual pressure testing rather than batch sampling, so the valve you install performs exactly as specified from day one.
If you're unsure which series suits your line's pressure class and flow conditions, our engineering team can help confirm the right fit before you finalize your order.
The series primarily differ in pressure rating and construction specification our team can confirm which series matches your application's operating conditions.