What is a Kunkle Valve?

Kunkle Valve is a premier manufacturer of pressure relief valves. In fact, Erastus B. Kunkle invented the safety valve, which he patented in 1875, to prevent overpressure in locomotive engines.

Is a vacuum relief valve necessary?

Pressure/vacuum relief valves are required if you have fixed roof atmospheric storage tanks. The relief valve is mounted on the storage tank’s nozzle opening, and it protects your tank from imploding or rupturing.

Where does vacuum relief go on water heater?

The Vacuum Relief Valve is located above the water heater and will open to atmosphere when a back-siphon (vacuum) occurs. This allows air to enter at the vacuum relief valve and the heater/tank will not be drained down. This protects heaters from dry-firing the elements or burner.

Is vacuum relief valve required for water heater?

Bottom fed water heaters and bottom fed tanks connected to water heaters shall have a vacuum relief valve installed. The vacuum relief valve shall comply with ANSI Z21.

Does a water heater need a vacuum relief valve?

What is the purpose of the safety relief valve?

AD Merkblatt (German)

  • American Petroleum Institute (API); Standards 520,521,526,and 2000
  • American Society of Mechanical Engineers (ASME); Boiler&Pressure Vessel Code,Section VIII Division 1 and Section I
  • American Water Works Association (AWWA),storage tanks
  • EN 764-7; European Standard based on pressure Equipment Directive 97/23/EC

    • How to select safety and pressure relief valves?

    Connection size and type. The valve size must correspond to the size of the inlet and discharge piping.

  • Set pressure (PSIG) The set pressure,which is measured in pounds per square inch (PSIG),is the pressure at which a safety or pressure relief valve opens.
  • Temperature.
  • Back pressure.
  • Service.
  • Required capacity.

    • What are safety and relief valves?

    Bronze – Commonly used for small screwed valves for general duty on steam,air and hot water applications (up to 15 bar).

  • Cast iron – Used extensively for ASME type valves.
  • SG iron – Commonly used in European valves and to replace cast iron in higher pressure valves (up to 25 bar g).

    • How does a Kunkle valve work?

    Extra high capacity for industrial,commercial and residential low pressure steam heating boilers.

  • Large seat area/guide area ratio,along with disc pivot design ensures optimum valve performance.
  • Lapped valve seats for optimum performance.
  • Reversible lift lever for ‘pull-up’ or ‘pull-down’ manual testing.

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