Product Overview

Operation with water flow

When a faucet is opened on the water system, the force of the spring becomes greater than that of the diaphragm; the shuttle moves downwards

opening the valve to the flow of water. The greater the demand for water the lower the pressure under the diaphragm with a resulting greater flow

of water through the valve.

Operation without water flow

When the faucet is closed, the downstream pressure rises and pushes the diaphragm upwards. As a result the shuttle closes the valve to the flow

of water and maintains the pressure at the pressure setting. The slight difference between the force of the diaphragm compared to that of the

spring causes the valve to close.

bar

UPSTREAM

DOWNSTREAM

Operating principle

Operation of the pressure reducing valve is based on the balance between two opposing forces:

100

3 4

psi

bar

100

3 4

psi

bar

Pressure operating

knob

1 The force of the

spring towards the

opening of the valve.

2 The force of the

diaphragm towards

the closure of the

valve.

100

3 4

psi

bar

100

3 4

psi

bar