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  4. WATER Plant Construction
  5. Regulating valves, dirt traps
  6. On/Off valve with special functions
  7. Pump protection valve with mecanical non-return flap
1795
1706
Pump protection valve with mecanical non-return flapPump protection valve with mecanical non-return flap

1705 Pump protection valve with mecanical non-return flap

datasheet manual

Article No. DNPN
(bar)		L
(mm)		weight
(kg)		Availability watchlist
1705007000 1 1/2" 16 210 9.000 on demand
1705008000 2" 16 210 9.000 on demand
1705040000 40 16 200 16.250 on demand
1705050000 50 16 230 16.750 on demand
1705065000 65 16 290 21.800 on demand
1705080000 80 16 310 27.900 on demand
1705100000 100 16 350 35.900 on demand
1705125000 125 16 400 52.000 on demand
1705150000 150 16 480 76.000 on demand
1705200000 200 10 600 115.100 on demand
1705200016 200 16 600 115.100 on demand
1705250000 250 10/16 730 247.500 on demand
1705300000 300 10/16 850 356.000 on demand
DN
watchlist
1705007000 1 1/2"
PN16 bar
L210 mm
weight9.000 kg
Availabilityon demand
1705008000 2"
PN16 bar
L210 mm
weight9.000 kg
Availabilityon demand
1705040000 40
PN16 bar
L200 mm
weight16.250 kg
Availabilityon demand
1705050000 50
PN16 bar
L230 mm
weight16.750 kg
Availabilityon demand
1705065000 65
PN16 bar
L290 mm
weight21.800 kg
Availabilityon demand
1705080000 80
PN16 bar
L310 mm
weight27.900 kg
Availabilityon demand
1705100000 100
PN16 bar
L350 mm
weight35.900 kg
Availabilityon demand
1705125000 125
PN16 bar
L400 mm
weight52.000 kg
Availabilityon demand
1705150000 150
PN16 bar
L480 mm
weight76.000 kg
Availabilityon demand
1705200000 200
PN10 bar
L600 mm
weight115.100 kg
Availabilityon demand
1705200016 200
PN16 bar
L600 mm
weight115.100 kg
Availabilityon demand
1705250000 250
PN10/16 bar
L730 mm
weight247.500 kg
Availabilityon demand
1705300000 300
PN10/16 bar
L850 mm
weight356.000 kg
Availabilityon 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.

Application

  • 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 fitted mechanical non–return flap prevents the valve from closing too quickly and consequently a backflow to the pump.

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

  • 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.

Vantages

  • Maintenance-free, non-rusting valve seat
  • Pressed-in seat
  • EWS-coating according to RAL GSK
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