Minimum Flow Valves

Minimum Flow Valves

To avoid damage within a centrifugal pump, the need to ensure a continuous minimum flow can be established with the use of a pump protection or automatic recirculation valve. A minimum flow aids the cooling of the bearings and the seals within the pump and reduces the potential for a continuous stop/start situation. The valve maintains a minimum flow through the pump, whilst also acting as a non- return check valve for the pump.

The service friendly pump protection valves from HORA will be custom made depending on the pump parameters and are available as two different types. As a self-acting mechanism applicable at pressures up to 200 bar, or as an actuated valve which is recommended at pressures > 200 bar.


Applicable for:

  • LP feedwater pumps
  • LP process pumps
  • Condensate pumps


  • < 200 bar pressure differential, full mechanical self acting pump protection valve
  • > 200 bar pressure differential, a motorised on/off valves or multi stage control valve


  • Additional Back Pressure Regulation possible
  • Anti cavitation trim
  • High quality forged- or castings
  • Z-type, angle or straight pattern
  • BW / flange connection according DIN or ANSI
  • Pumpspecific
  • Single- or multistage construction
  • DIN
  • ANSI
  • Pneumatic / electric


  • No requirement for an external actuator
  • Completely mechanical construction
  • Maintenance friendly
  • Built in check valve
  • Horizontal and vertical mounting possible


HORA is a German manufacturer of high pressure steam and water control valves covering all control systems in modern power plants. Together with a very good R&D department we are continuously seeking for better solutions and controllability of the steam water cycle. Flexible and dedicated performance company, supplying all tailor-made products.

  • Control valves
  • Steam conditioning valves
  • Feed water Control valves
  • Water injection valves
  • Desuperheater valves
  • Turbine bypass valves
  • Turbine shut-off valves
  • Automatic recirculation valves (Pump protection)
  • Valves for super critical boilers

Product brands

Advanced Valve Solutions works with a number of carefully selected, well-established quality manufacturers. With some of them, Advanced Valve Solutions close collaboration led to innovations and innovative products for Power-, Oil & Gas and Petrochemical industries. With all our suppliers, we maintain very good relations and short communication lines. This allows us to quickly and effectively respond to market demands.

Hora Power Technology
Persta Eurovalve
severn glocon / severn unival
BZ Zyklon

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