User manual HONEYWELL D17P

[. . . ] D17P Pressure reducing valve with balanced seat Standard Pattern Product specification sheet Application Pressure reducing valves of this type protect installations against excessive pressure from the supply. [. . . ] 25. 0 bar 1. 5 - 8 bar - DN50 - 150 1. 5 - 6 bar - DN200 Range of Application Medium Housing with PN25 flanges to ISO 7005-2, EN 1092-2 Spring bonnet with adjustment screw Adjustment spring Valve system complete with diaphragm Pressure gauge Technical Data Spherolitic cast iron housing Cast iron spring bonnet Brass valve seat Brass piston guide Cone up to DN150: brass, DN200: steal Spring steel adjustment spring EPDM diaphragm NBR seal collar NBR seals Stainless steel screws and nuts Inlet pressure Outlet pressure Materials · · · · · · · · · · Operating tempera- max. 70°C ture Nominal pressure Minimum pressure drop PN25 1. 0 bar Diaphragm pressure max. 9. 0 bar loading Nominal size *As DN50 - DN200 part of an installation being approved according to PED requirements, this product must also be certified. www. honeywell. com 1 D17P Pressure reducing valve with balanced seat Method of Operation Spring loaded pressure reducing valves operate by means of a force equalising system. 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. [. . . ] La Pièce 16, Switzerland by its Authorised Representative Honeywell GmbH EN0H-1009GE23 R0209 Subject to change without notice © 2009 Honeywell GmbH [. . . ]