Pump protection valve

1706007000 Pump protection valve DN 1 1/2" PN 10/16


  • 1: Main valve
  • 2: Ball valve (A, B)
  • 3: Filter (A, B)
  • 4: Throttle check valve
  • 5: Electric solenoid valve
  • 6: Check valve (A, B)
  • 7: Electric position indicator
  • 8: Accessories (optional)
Pump protection valve DN 1 1/2" PN 10/16
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Product attributes
DN 1 1/2"
PN 16 bar
L 210 mm
weight 10.000 kg
Availability on demand

Physical characteristics

  • The main valve is a hydraulically operating diaphragm valve. The work energy is the inherent medium.
  • Most valve types operate purely hydraulically without any foreign energy.


  • To use in drinking water systems (other media after consultation)
  • Actuation of the valve with the pump control system
  • Protection of the pump against overloading caused by a no–load operation

Mode of operation

  • The pump protection valve opens with a time delay after the pump is started up. Consequently the network pressure increases to the full pump pressure before the valve opens. With a controlled stopping of the pump, the valve closes before the pump stops. The opening and closing speeds can be set on the throttle non–return valve. In the event of a power failure, the installed hydraulic return–flow function prevents a backflow to the pump (the valve closes).

Product information

  • To calculate the dimensions of the valve please refer to the following information:
  • Maximum and minimum inlet pressure (static and dynamic pressure ratios)
  • Existing counterpressure
  • Required flow rate, pump capacity
  • Maximum permissible loss of pressure
  • Voltage information for the solenoid valve
  • Available line diameters and lengths
  • Construction of the valve (straight or angle design)
  • The controller is to be provided by the customer.
  • For the calculation basis, information on the loss of pressure and the characteristic values of the valve, please refer to the end of Chapter E.


  • Design according to DIN EN 1074
  • Construction length acc. to DIN EN 558
  • Flange mass according to DIN 1092-2, to PN 25 DN 300
  • Pressure levels: PN 10 or PN 16 to DN 300, PN 25 to DN 200, higher pressures on request.
  • Nominal widths DN 50, DN 80, DN 100 and DN 150 available in angular design
  • Nominal widths 1 ½" and 2" with threaded connection (female thread)
  • Medium temperature up to 40°C

Installation and assembly

  • The pump protection valve is installed in the feed pipe of the pipe. A shut–off valve is to be installed on the outlet side.


  • Maintenance-free, non-rusting valve seat
  • Pressed-in seat
  • EWS-coating according to RAL GSK
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    1. DE
    2. EN