1400 1402
Pressure relief and pressure retention valve DAV with flow-back prevention

1401 Pressure relief and pressure retention valve DAV with flow-back prevention

Components

  • 1: Main valve
  • 2: Ball valve (A, B)
  • 3: Filter
  • 4: Orifice
  • 5: Throttle check valve (A, B)
  • 6: Control valve
  • 7: Pressure gauge with ball valve
  • 8: Optical position indicator (optional: Electrical position indicator, opening limiter)
  • 9: Check valve (A, B)
Datasheet manual

performance diagram

brochure

certificate

Article No. DN PN
(bar) 		L
(mm) 		weight
(kg) 		Availability Watchlist
1401007000 1 1/2" 16 210 11.000 on demand
DAV with non-return function DN 1 1/2" PN 10/16
1401007000
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1401008000 2" 16 210 11.000 on demand
DAV with non-return function DN 2" PN 10/16
1401008000
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1401040000 40 16 200 15.750 on demand
DAV with non-return function DN 40 PN 10/16
1401040000
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1401050000 50 16 230 16.250 on demand
DAV with non-return function DN 50 PN 10/16
1401050000
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1401065000 65 16 290 21.300 on demand
DAV with non-return function DN 65 PN 10/16
1401065000
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1401080000 80 16 310 27.400 on demand
DAV with non-return function DN 80 PN 10/16
1401080000
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1401100000 100 16 350 35.400 on demand
DAV with non-return function DN 100 PN 10/16
1401100000
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1401125000 125 16 400 51.500 on demand
DAV with non-return function DN 125 PN 10/16
1401125000
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1401150000 150 16 480 76.000 on demand
DAV with non-return function DN 150 PN 10/16
1401150000
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1401200000 200 10 600 114.600 on demand
DAV with non-return function DN 200 PN 10
1401200000
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1401200016 200 16 600 114.600 on demand
DAV with non-return function DN 200 PN 16
1401200016
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1401250000 250 10/16 730 247.000 on demand
DAV with non-return function DN 250 PN 10/16
1401250000
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1401300000 300 10/16 850 359.000 on demand
DAV with non-return function DN 300 PN 10/16
1401300000
Add to an existing list

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)
  • Sustaining the network pressure in a supply and preventing any backflow
  • Protection of the network by releasing excess pressure, when the backflow also has to be simultaneously prevented

Mode of operation

  • The pressure relief valve maintains constant the pre-set inlet pressure (p1). Any excess system pressure is relieved by fast opening of the valve. The closing procedure is slow in order to avoid shock pressure loads. Variable flow rates have no effect on the maintained pressure which is regulated by the control valve. The overpressure or maintained pressure can be set within the range of 2 bar to 16 bar (standard design). The valve closes if a backflow enters the system (p1 is smaller than p2)

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)
  • Required sustained pressure or dischargepressure
  • Possible differential pressure with backflow
  • Maximum and minimum flow rates
  • Available line diameters and lengths
  • Construction of the valve (straight or angle design)
  • 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

  • Shut–off valves should be fitted on both sides of the valve and a dirt trap should be installed on the inlet side of the valve. If the valve outlet flows to the outside or into a shaft, the outlet slider can be omitted. Depending on the installation situation, a mounting/dismounting adapter should be provided.

Vantages

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