Product - Re 34 Pressure Control Valve

​​​​​​​​​​​​​​​​​​Pressure control valve for water with spring loading and balance pistons


After decades of continuous development, the IMI Bopp & Reuther pressure control valves in the Re34 series are among the most robust valves in this area. They are known for their smooth control behaviour and their long life cycles, even under demanding conditions. With these valves, the inlet pressure is balanced by a proven and tested piston system, in which the seals can be quickly and easily replaced. The outlet pressure is largely independent of the flow rate and almost entirely independent of the inlet pressure. 
Thanks to their high continuous output, smaller sizes are frequently possible, which leads to cost savings in the pipeline network.​

  • Constant low pressure is maintained even in the event of high output and a small di‘erence between high and low pressure.
  • Main valve with throttle cone, counter pistons and spring loading.
  • The valve insert can be removed as a complete module.
  • Not much space is required for removal
  • All seals can be replaced without removing the housing from the pipe.
  • Control in the parallel connection pipe, consisting of: Venturi nozzle, control valve, low-pressure manometer with manometer valve.
  • Arrangement of the parallel connection pipe with the direction of flow to the right. (On request: left arrangement)

Inlet sizes
DN 65 to DN 400

Pressure stages
PN 10 to PN 40

Outlet pressure range
0.8 bar up to 15 bar possible​


  • ​For cold water, drinking water, fluctuating flow and largest volume mass flow

Mode of operation​

Pressure control valve: Example

Material code​

Setting and installation​

Main and control valves are preset at the factory unless special agreements are made. Instructions for setting, installation and operation can be found in the operation and maintenance manual (0-37-11000). The pressure test​ corresponds to the technical delivery conditions for large and steam valves in accordance with DIN 3230.​

Setting range of the springs​

Sizes, pressure ranges and dimensions​

​Unit conversion​

Layout diagram​


The upper scale is used to convert units l/s and l/min to m³/h.
How much goes through a valve at a pressure di‘erence of 2.8bar?

​     ​​​        The red line is 2.8bar​​​​​​​​

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Product - Re 34 Pressure Control Valve