Check Valves

Crack pressure variability often leads to control instability in finely tuned hydraulic and pneumatic systems. Spring-loaded designs in these valves maintain precise actuation thresholds, with crack pressures calibrated to within ±5% of the specified setpoint. This is achieved through ground spring assemblies and machined seat interfaces that resist fatigue and thermal distortion. The result is predictable valve behavior regardless of fluid viscosity, thermal cycling, or system pulsation, ensuring tight control over startup, shutdown, and modulation phases. 

Applications handling aggressive media, toxic compounds, or pressurized gases demand absolute seal integrity. These valves incorporate metal-to-metal lapped sealing surfaces or resilient seat materials such as FKM, EPDM, or PTFE, depending on service compatibility. Reverse leakage is tested per API 598 or ISO 5208 protocols, with Class VI shutoff achieved in resilient-seated configurations. In critical isolation lines, valve sealing performance remains stable across extended pressure holds and under fluctuating line pressures up to 690 bar.