Prevent siphoning and stabilize dosage rates with SENTINEL Diaphragm Back Pressure Valves
Diaphragm back pressure valves are designed to enhance the performance of pumping systems by applying a continuous back pressure to the system pump, while also acting as an anti-syphon valve. Robust construction ensures reliability in the rigorous service of municipal and industrial applications.
Reliability and low cost
Adjustable 5-150 psi for standard, 5-50 psi low pressure, or 50-350 psi high pressure
Anti-siphon function
Robust machined construction
Vulcanized PTFE/EPDM diaphragm
Full range of chemically resistant wetted materials
Sizes from ¼” to 4” depending on model
Diaphragm back pressure valves apply positive discharge pressure to a metering pump system to prevent siphoning and eliminate varying dosage rates caused by fluctuating downstream pressure. The diaphragm is held against the valve seat by an internal spring. When the preset pressure is exceeded, the diaphragm is forced up and system fluid flows through the valve to the injection point. The valves are preset for 50 psi, however they are field adjustable from 5 to 150 psi, (optional up to 350 psi for high pressure) via the adjustment screw. Installation should be as close to the injection point as possible to prevent system line drainage, and it is most important that all pumping system equipment such as pulsation dampeners and pressure gauges are between the pump and back pressure valve.
Protect pumping systems from pressure damage with SENTINEL Diaphragm Pressure Relief Valves.
Diaphragm pressure relief valves are designed to protect pumping systems from over pressure damage caused by defective equipment or blockage in the pump system line. Robust construction ensures reliability in the rigorous service of municipal and industrial applications.
Reliability and low cost
Compact size for OEM applications
Adjustable 5-150 psi for standard, 5-50 psi low pressure, or 50-350 psi high pressure
3 port, 2 port and 90° configuration
Robust machined construction
Vulcanized PTFE/EPDM diaphragm
Full range of chemically resistant wetted materials
Sizes from ¼” to 4” depending on model
Diaphragm pressure relief valves operate when the pressure in the pumping system exceeds the preset pressure of the valve. The diaphragm is held against the valve seat by an internal spring. When the preset pressure is exceeded the diaphragm is forced up and the system fluid flows out the relief port, back to the system fluid tank or to the suction side of the pump. The valves are pre-set at 50 psi, however they are field adjustable from 5 to 150 psi, (optional up to 350 psi for high pressure) via the adjustment screw. The relief valve should be set approximately 15 psi higher than the system pressure. Installation should be made as close to the pump as possible, without any valves or accessories between the relief valve and the pump. Consult your pump manufacturer for recommendations.
Specification Sheet
SENTINEL Back Pressure & Pressure Relief Valves.pdf
