RELIEF OR BACK PRESSURE VALVE

BACK-PRESSURE VALVE: useful when injection point is below dosing tank to prevent siphoning effect. As a backpressure valve, installed in-line downstream of a pump, the backpressure below the metering pump is maintained.

RELIEF VALVE: opens an overflow line if the preset pressure limit is exceeded. This application also is a safety device to protect pump diaphragm. When installed in the branch of a tee it is a pressure relief valve. The valve stays closed until inlet pressure reaches the set pressure, which is adjusted by turning the spring tensioning bolt. Inlet pressure acts on the Teflon®control diaphragm opening the valve, allowing excess pressure to flow downwards through the orifice.

valvola di sfioro

Max flow

Connections

Liquid ends

250 l/h

3/8” BSPf-DN 10

PVC-EPDM / PTFE

230 l/h

1/2” BSPm

AISI 316L

1050 l/h

1/2” BSPm -DN 15

PVC-EPDM / PTFE

420 l/h

3/4” BSPf

AISI 316L

420 l/h

3/4” BSPf

PVC

1050 l/h

1” BSPm

AISI 316L

1050 l/h

1” BSPm

PVC