Flow limitation valve MBV with DRV DN 80 PN 25Flow limitation valve MBV with DRV DN 80 PN 25

1302080025 Flow limitation valve MBV with DRV DN 80 PN 25

Components

  • 1: Main valve
  • 2: Ball valve (A, B, C)
  • 3: Filter
  • 4: Orifice
  • 5: Throttle check valve
  • 6: Control valve differential pressure measurement
  • 7: Differential pressure orifice plate
  • 8: Optical position indicator (optional: Electrical position indicator, opening limiter)
  • 9: Control valve pressure reduction
  • 10: Manometer with ball valve (A, B)
  • B: DN 40 to DN 150: 22 mmDN 200 to DN 250: 27 mmDN 300 to DN 400: 29 mm
  • X: 5 x DN line
  • Y: 3 x DN line
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Product attributes
DN 80
PN 25 bar
L 310 mm
weight 27.400 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.

Application

  • To use in drinking water systems (other media after consultation)
  • Limitation of the inflow from a pressure zone into a lower pressure zone
  • Constantly maintaining a filter flow
  • The supply to a secondary network necessitates a limitation of the flow, so as to not endanger, for example, the extinguishing reservoir of the primary network (in combination with a reduction in pressure).

Mode of operation

  • The flow–control valve completely hydraulically ensures a pre–determined maximum flow, irrespective of any changes in the operating pressure. The nominal flow rate can be progressively varied up to ±15% via the control valve. The inlet pressure is reduced to a constant outlet pressure downstream of the orifice plate.

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 outlet pressure after the orifice plate
  • Required flow rate
  • Permissible loss of pressure incl. measuring orifice (usually 0.5 bar over the valve and orifice plate)
  • 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. Depending on the installation situation, a mounting/dismounting adapter and an aeration and ventilation system should be provided.
  • The orifice plate must be installed after the valve. It is recommended that the following measurements are taken into consideration:
  • X = 5 x DN, distance between the valve and the orifice plate in a straight line
  • Y = 3 x DN, distance after the orifice plate and the shut–off component, in a straight line

Vantages

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