Caleffi Prescal 1 1/4 Inch Pressure Reducing Valve

Caleffi Prescal 535 pressure reducing valves are installed in residential water systems to reduce and stabilise inlet pressures from mains water supplies or boosted water systems, which generally are too high and variable for domestic appliances to function correctly. The Series ...Caleffi Prescal 535 pressure reducing valves are installed in residential water systems to reduce and stabilise inlet pressures from mains water supplies or boosted water systems, which generally are too high and variable for domestic appliances to function correctly. The Series 533 cold is specially designed for cold services in domestic and semi-commercial applications to equalise the cold water supply and prevent excessive pressure at outlets such as taps and showers.

The Series 533 cold pressure reducing valves are pre-adjustable enabling them to be set at the required discharge pressure prior to installation, by means of the adjustment knob with pressure setting indicator. The internal cartridge and control knob mechanism is assembled as one unit to make removal easier for inspection, cleaning and maintenance. The compensated seat design means that the set downstream pressure remains independent of upstream pressure variations.

The hydraulic profile of the valve makes it possible to achieve low pressure losses, even when a large number of outlets are open. The control stem housing of the cartridge is made from a plastic material with a low co-efficient of adhesion, which reduces the probability of scale deposits forming, the main cause of pressure reducing valve malfunction.