Constant Pressure Relief Valve
Constant Pressure Relief Valve
Constant Pressure Relief Valve is a mechanical safety component designed for positive pressure CBRN systems operating in accordance with NATO AEP54 standards. The valve is engineered to automatically discharge excess internal pressure at a predefined constant set point, ensuring stable overpressure conditions within sealed and protected environments.
Constant Pressure Relief Valve
Constant Pressure Relief Valve is used to automatically limit internal pressure by releasing excess air when the pressure reaches a fixed threshold. Unlike adjustable designs, the valve maintains a constant pressure set point, preventing continuous pressure buildup and protecting the structural integrity of the CBRN system.
Deployment Areas
The valve is deployed in positive pressure CBRN systems installed in military vehicles, armored platforms, shelters, and protected enclosures. It is suitable for applications requiring continuous overpressure control to prevent the ingress of contaminated air from external environments.
Design and Structural Characteristics
The valve operates with a spring-based mechanical structure calibrated to a constant opening pressure. When the internal pressure exceeds this predefined level, the valve opens automatically to discharge excess clean air and closes once pressure stabilizes.
Constant Pressure Relief Valves can be manufactured in standard configurations or special dimensions based on user and platform requirements. The design supports continuous and reliable pressure regulation without manual intervention during operation.
Test Standards
Constant Pressure Relief Valves used in CBRN systems are designed and validated in accordance with the following standards:
NATO AEP54 requirements for collective protection systems
API 527 for seat tightness testing
ISO 4126 for general safety valve requirements
ASME Boiler and Pressure Vessel Code Section VIII
EN 764-7 for overpressure protection devices
These standards verify pressure resistance, sealing performance, repeatability, and operational safety.
Functional Role
The valve maintains constant internal overpressure by automatically releasing excess air generated by the CBRN filtration system. This controlled discharge ensures that internal pressure remains within safe limits while continuously preventing external contaminated air from entering the protected environment.