CALEFFI 5350/5351

Description

Pressure reducing valves are devices which, when installed on private water systems, reduce and stabilise the pressure of the water entering from the public network. This inlet pressure, in
general, is too high and variable to be applied directly to domestic systems. This series of pressure reducing valves have the feature to be preadjustable. The pressure reducing valve can be set to the desired pressure value before installation, using an adjustment knob with a pressure setting indicator. After installation, the system pressure will automatically adjust itself to the set value.
The internal cartridge containing all the regulating components is pre-assembled as a “self-contained unit”, to facilitate inspection and maintenance procedures. A version fitted with an inspectable high-capacity strainer, located inside a special transparent container, is also available. This ensures the pressure reducing valve and water system are well protected from any impurities in the water supply. 5350 and 5351 series pressure reducing valves are certified as compliant with European standard EN 1567.

Tecnical description

• Operation with water flow:
  • When a draw-off outlet is opened on the water system, the force of the spring becomes greater than that of the diaphragm; the obturator 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 draw-off outlet is closed, the downstream pressure rises and pushes the diaphragm upwards. As a result the obturator closes the valve to the passage of water and maintains the pressure constant at the calibrated pressure. The slightest difference in favour of the force exercised by the diaphragm, in relation to that of the spring, causes the device to close.