Pump protection valves

Pump protection valves, minimum flow control valves or Bypass Check Valves called, protect centrifugal pumps from running dry and / or cavitation. A freewheeling (bypass) of such valve controls a necessary for the pump minimum quantity independently and autonomously - without any auxiliary energy!

These fittings are perpendicular as possible immediately after the discharge of the pump, usually installed with upward flow in the discharge line. The side port (bypass) is through a one-way line - so-called minimum quantity line, are connected to the feed tank (expansion tank) so that the outflow of the minimum amount is guaranteed at all times..