Blacoh's Sentinel Pressure Relief Valves

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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.

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

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
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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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