The SCHROEDAHL pump protection valve (Automatic Recirculation valve)

SCHROEDAHL invented the pump protection valve and is http://www.achaten-suisse.com/ the world market leader in this sector.

Pump protection valves are required to ensure the minimum flow rate of a pump at all times. This protects the pump against overheating, cavitation and finally, destruction. If the flow through the pump falls below a certain level the bypass system opens and the fluid will be recirculated providing the required minimum flow for the pump.

The SCHROEDAHL- pump protection valves work in a modulating way. Should the discaharge increase through the following processes, then the amount of fluid recirculated by the bypass is automatically reduced- and vice versa. This increases the efficiency of the entire system and optimises the economy in the low-load operation.

The pump protection works entirely over the inside valve technology. The volume by which the process decreases is measured independent of the pressure – the amount returned over the bypass is adapted automatically. 

 

Pump Protection Valves – Overview

Type MRM

Type MRM

  • Max. PN #4500 / PN 640
  • Forged Body
  • High Pressure Let Down
  • Bypass Device (up to 7 Stages)
  • E. g. Offshore Application

 

Type TDL

Type TDL

  • Max. PN #300 / PN 63/64 in except. PN #600 / PN 100
  • Forged Body
  • Check Valve in the Bypass
  • Venturi Ring Design

 

 

Type SUL

Type SUL

  • Max. PN #300 / PN 63/64
  • Cast Body
  • Economic and Sufficient Design

 

 

Type TDM

Type TDM

  • Max. PN #2500 / PN 400
  • Forged Body
  • High Pressure Let Down
  • Bypass Device (up to 5 Stages)

 

 



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