The pressure reducing valve reduces a variable inlet pressure to an accurate and constant outlet pressure.
Fluctuating inlet pressure and flow do not affect the regulated outlet pressure - this can be set as standard in the range 1.5 to 12 bar.
Application: in the drinking water sector, to supply the network and in emergency feeds
Variants: Electrically controlled, for two pressure stages as well as motor-controlled and combinations thereof
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)
Reduction in pressure to supply the network
Emergency feed into a second network (network connections)
Mode of operation
The pressure reducing valve reduces a variable inlet pressure to a constant outlet pressure. Fluctuating inlet pressure and flow rate have no effect on the outlet pressure controlled by the control valve. The outlet pressure is adjustable in the range from 1.5 to 12 bar (standard design).
To calculate the dimensions of the valve please refer to the following information:
Maximum and minimum inlet pressure (static and dynamic pressure ratios)
Desired outlet pressure
Maximum and minimum flow rates
Possible requirement for extinguishing water
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 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
- Basic valve EN-GJS-400
- Epoxy coating (min. 250 µm) acc. to GSK, RAL 5012
- Spindle unit INOX, EN-GJS-250
- Control line, fittings and control filter stainless steel
- Control valve INOX
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.
Maintenance-free, non-rusting valve seat
EWS-coating according to RAL GSK