Safety Valve / Pressure Relief Valve in Singapore

A pressure safety valve is sometimes known as Safety Relief Valve. Its purpose is to prevent pressure buildup in a pressurized vessel or line to go above the set point by venting to the atmosphere or diverting the flow to an alternate channel.

It can be used for all mediums, including air, liquids, gases, water and oil.

As it is considered a critical component, some authorities may require periodic testing to certify that it is in working order. We test the safety valve in our test bench to ensure that it will relieve the pressure during actual emergencies. 

Important engineering considerations involve sizing and material selection.

If you’re looking for a pressure relief valve in Singapore, browse our selection today.



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Max Capacity kg/h

Body and Cover Material

Secondary Pressure Range

Type of Trap

Glass O.D / Length

Pipe Size


Safety Valve / Pressure Relief Valve in Singapore


    What is a Pressure Safety Valve

    A pressure safety valve protects pressure vessels from overpressure by opening automatically when the set pressure is reached.

    If a pressure safety valve is not installed, the pressure in the system/vessel may increase to dangerous levels, resulting in process upsets, equipment failure, or even risk of loss of life.

    Parts of a Safety Valve

    1. Nozzle – Connection of the safety valve

    9. Adjusting Screw – This is where you adjust the set pressure

    4. Cap – Prevents access to the adjustment screw

    11. Spring – Holds the disc down to close the safety valve

    5. Disc – Blocks the orifice to close the safety valve

    Sizing of Safety Valves: Basics

    Proper sizing involves complex calculations to determine the required orifice size. It depends on various factors such as the type of fluid, temperature, maximum set pressure and the required relief capacity of the safety valve. This ensures that during an emergency, the relief valve is able to vent enough fluid to reduce the pressure.

    The calculation of the orifice size is usually done using software. Some manufacturers also provide a capacity chart to determine the required orifice size.

    Contact us for help in selection and sizing here.

    Determining the Set Pressure

    The set pressure usually depends on the maximum working pressure of the equipment or line that the pressure safety valve is supposed to protect.

    Maintenance & Calibration Procedure

    It is important and sometimes mandatory by law to perform calibration and testing of the pressure safety valve. The purpose is to ensure that the valve is in proper working condition and will not fail when it needs to discharge pressure.

    In Singapore, it is mandatory for all safety valves installed at boilers and pressure vessels to undergo re-certification regularly.

    A pressure safety valve may fail due to:

  • Repeated opening and closing
  • Dust, rust and other debris from the pipe
  • Normal wear and tear
  • Calibration Procedure

    Performing calibration and servicing requires a proper test bench that can deliver air or water at different pressures to perform the required tests. During a pop test, the pressure is slowly increased until the valve opens slightly. This has to be done carefully to prevent damage to the safety relief valve. A leakage test must also be carried out to ensure that the valve is not leaking.

    Pressure Control Valves in Singapore

    It is critical that pressure is effectively managed in closed containers or tanks. As such, we recommend getting a pressure control valve, which will help you avoid catastrophic failures in the system vessel.

    Looking for a pressure relief valve in Singapore? Browse our selection of products today!