The modern processing industry often requires centrifugal pumps to operate with fluctuating flows, due to the automation of such processes. When flows are too low in centrifugal pumps, however, this may result in overheating and lead to damage or cause unstable operation. It is important that flows through a pump do not fall below a certain minimum as stated by the pump manufacturer. The SUL valve is a reliable and economic solution.
The SUL valve combines four functions in one:
- The Automatic Recirculation Valve senses the main flow and positions the disc in the correct position.
- The Automatic Recirculation Valve also bypasses the minimum flow to a suction tank, preventing the pump from overheating.
- The cascade element in the bypass reduces the pressure of the main flow, reducing noise and wear and tear.
- The Automatic Recirculation Valve also operates as a check valve, preventing a return flow through the pump.