[. . . ] D15NP Pressure reducing valve with balanced seat Low pressure pattern Product specification sheet Application Pressure reducing valves of this type protect installations against excessive pressure from the supply. [. . . ] The force of a diaphragm operates against the force of an adjustment spring. If the outlet pressure and therefore diaphragm force fall because water is drawn, the then greater force of the spring causes the valve to open. The outlet pressure then increases until the forces between the diaphragm and the spring are equal again. The inlet pressure has no influence in either opening or closing of the valve. Because of this, inlet pressure fluctuation does not influence the outlet pressure, thus providing inlet pressure balancing. A = With PN 16 flanged connections to DIN 2533 and BS 4504, cast iron housing Special Versions available on request Connection size Connection size Weight Dimensions kvs-value DN kg mm L approx. [. . . ] La Pièce 16, Switzerland by its Authorised Representative Honeywell GmbH EN0H-1008GE23 R1109 Subject to change without notice © 2009 Honeywell GmbH [. . . ]