DRV024A is a high pressure regulating landing valve suitable for installation on wet risers in buildings for fire-fighting purposes,
permanently charged with water from a pressurized supply.
The design and construction of the landing valves are in accordance with BS5041-1 and the requirements of BS9990: 2015.
The valve is suitable for connection of a high pressure water supply of up to 25 bar (362 psi) and will provide a reduced outlet pressure which can be set in-situ during testing and commissioning of the fire protection system.
When the valve is closed, watertight sealing is achieved by using a high quality rubber bonded seat disc which acts as a primary rubber to metal seal.
When the valve is open, the inlet pressure flows into the upper part of the pressure chamber. By adjusting the spring below, a balance pressure of these two forces determines the degree of the valve opening to maintain a constant outlet pressure.
Each valve is hydrostatically pressure tested to 25 bar and 30 bar for the valve seat and body respectively. The valve is supplied with a standard red plastic BS336 plug and chain.