Blacoh Sentinel Pressure and Back Pressure Relief Valves are instruments for preventing siphoning and stabilising dosage rates. Diaphragm back pressure valves are designed to enhance the performance of pumping systems by applying continuous back pressure to the system pump, while also acting as an anti-syphon valve. On the other hand, Diaphragm Pressure Relief Valves are designed to protect pumping systems from damage caused by excessive pressure, which is often the result of defective equipment or blockage in the pump line.
KNOW MORE ABOUT BLACOH SENTINEL PRESSURE RELIEF VALVES SERIES
Design Advantages
Robust construction, high reliability, low cost
Compact Size for OEM Applications
Adjustable spring pressure from 0.34 - 24.13 bar
3 Port, 2 Port & 90° Configuration
Vulcanized PTFE/EPDM Diaphragm
Wide Range of Materials for different applications
Available Options
Optional 24.13 bar Rated Valve
Hybrid valve option
Full range of chemically resistant wetted materials
Key Specifications
Temperature up to 60°C (Plastic) or 149°C (Metal)
Capacity up to 7570.82 li (Back pressure relief) or 16277.27 USgal (Pressure relief)
Applications
Pressure relief in pumps used in:
MUNICIPAL
WATER AND WASTEWATER TREATMENT
WATER SUPPLY
INDUSTRIAL
FOOD & BEVERAGES
DAIRY
OIL, FAT, SAUCE AND MAYONNAISE
BREWING AND BEVERAGES
BAKERY AND CONFECTIONERY
PHARMACEUTICAL
CHEMICAL
TRANSPORTATION
PRINCIPLE OF OPERATION
Diaphragm Back Pressure Valves continuously apply positive discharge pressure to the pump system to prevent siphoning. Meanwhile, Diaphragm Pressure Relief Valves start operation when the pressure in the pumping system exceeds the preset pressure of the valve.
Both diaphragms are held against the valve seat by an internal spring. Their operation is triggered when the preset pressure is exceeded. For Back Pressure Valves, the diaphragm is forced up and system fluid flows through the valve to the injection point. Meanwhile, for Pressure Relief Valves, the diaphragm is forced up and system fluid flows out of the relief port, going back to the tank or the pump suction side.
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