User manual HONEYWELL DH300

[. . . ] They are used wherever a specific inlet pressure must not be exceeded, for example limiting the pressure in the inlet supply network or in transition links between supply networks and high demand large users. [. . . ] They can be used for commercial or industrial applications within the scope of their specification. bar Special Features · · · · · · High flow capacity Light weight High control accuracy Powder coated inside and outside - Powder used is physiologically and toxicologically safe Integral control circuit and ball valves No external energy required for operation Water 1 - 12 bar Range of Application Medium Construction The pressure sustaining valve comprises: · · · · · · · · · · · · · · Housing with PN16 flanges per ISO7005-2, EN1092-2 Pilot valve CX-PS with integral fine regulation valve Control circuit with ball valves on inlet and outlet Control circuit with integral rinsable filter insert Ductile iron housing, cover plate and diaphragm plate (ISO 1083), powder coated Red bronze/stainless steel regulating cone Stainless steel pressure spring and control rod Fibre-reinforced NBR diaphragm NBR and EPDM seals Stainless steel valve seat High quality synthetic material control circuits Brass compression fittings Brass pilot valve housing Stainless steel filter insert Opening pressure Technical Data Operating tempera- Max. 80 °C ture Nominal pressure Minimum pressure Connection size PN 16 PN 25 on request 0. 7 bar DN 50 - 450 Operating pressure Max. 16 bar Materials EN0H-1331GE23 R0807 · Subject to change www. honeywell. com 43 DH300 Pressure sustaining valve Method of Operation Under zero pressure conditions the valve is closed. If the supply is opened, water flows into the inlet section and the rising pressure opens the valve so that water can flow into the outlet section. A = Mesh size approximately 0. 5 mm FY69P F76S-F Reverse-rinsing filter Red bronze housing and filter bowl. Available in sizes DN 65 to DN 100, with filter mesh sizes 100 µm or 200 µm RV283P Check valve F76S-F Grey cast iron housing, powder coated inside and outside. DIN/DVGW tested in compulsory test sizes DN 65, DN 80 and DN 100 RV283P 44 www. honeywell. com EN0H-1331GE23 R0807 · Subject to change DH300 Pressure sustaining valve Installation Example Installation Guidelines · · · · · Install shutoff valves on both sides of the pressure sustaining valves Fit strainer upstream of pressure sustaining valves o Protects against damage from coarse dirt Note flow direction (indicated by arrow) Ensure good access o Simplified maintenance and cleaning Install connectors for removal and refitting for maintenance Typical Applications Pressure sustaining valves of this type, within the limits of their specification, are suitable for installations in the central water supply, for household and also for industrial and commercial installations. The following are some typical applications: · · · · · Potable water supplies for example to limit the pressure in the inlet supply network Watering systems in market gardens and in agriculture Water supply networks in large building developments (eg. [. . . ] high rise blocks) Mining applications Gravel pits, concrete mixing plants etc. Flow Diagram 500 EN0H-1331GE23 R0807 · Subject to change 100 50 10 5 5 1 0, 5 0 www. honeywell. com 45 DH300 Pressure sustaining valve Spare Parts Pressure sustaining valve DH300, from 2002 onwards 1 2 bar No. [. . . ]