Reliance Water Controls PRV Pressure Reducing Valves

RWC – Reliance Water Controls PRV Pressure Reducing Valves

WRAS Approved Pressure Reducing Valves Suitable for Domestic, Commercial & Industrial Applications

Reliance Water Controls supply a range of WRAS approved PRV pressure reducing valves to provide accurate pressure control for a wide range of domestic, commercial and industrial applications.

Water supply pressures can vary from as little as 1 bar to 20bar+, additionally supply pressure can vary throughout a typical day in response to higher usage periods during the day time and low water usage at night.

High supply pressures can result in a number of problems ranging from excessive noise from high flow velocities, water hammer from quick closing taps or solenoids and more importantly an increased risk of water wastage due to higher flow rates. PRV pressure reducing valves resolve this issue by reducing the pressure of the incoming supply.

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Reliance Water Control’s pressure reducing valves use a cartridge system which contain the working components of the PRV such as the strainer, spring, diaphragm and seat and allows for the maintenance to be carried quickly and simply by replacing the cartridge unit.

RWC’s PRV’s adhere to EU Class I BS EN 1567 regulations and ensure any noise caused by the valve is no more than a whisper at 20dB. This is achieved by the base of the cartridge unit which allows water to disperse and thereby minimise noise levels.

RWC – Reliance Water Controls PRV Pressure Reducing Valves – Sizing Guide
Size DN

Residential Building

Max Flow Rate

vs

l/s

Commercial Building

Max Flow Rate

vs

l/s

15mm 0.5 0.5
20mm 0.8 0.9
25mm 1.3 1.5
32mm 2 2.4
40mm 2.3 3.8
50mm 3.6 5.9
65mm 6.5 9.7
80mm 9 15.3
100mm 12.5 23.3
125mm 17.5 34.7
150mm 25 52.8
200mm 40 92
250mm 75 139

To select the right size of PRV valve you need to determine the flow rate for the application. To do this you must determine the number of outlets required and the combined maximum flow rate for these will be.

Installing an incorrectly sized valve can cause a number of problems. An oversized PRV may open for a very small flow rate which over a long period of time can result in a wire drawing across the valve seat. 

This occurs when the valve disc and seat position operate close to the shut off point for the valve for extended periods of time and this allows the water flow to score a pathway in the seat material which will remain when the valve is intended to be closed.

Reliance Water Controls PRV Pressure Reducing Valves
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Reliance Water Controls PRV Pressure Reducing Valves
Reliance Water Controls PRV Pressure Reducing Valves

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