An AWWA C509 / C515 resilient-seated gate valve with a rising stem, built for fire mains: the stem rises through the yoke as the valve opens, so anyone in the plant can read the position from the floor without a gauge, and the stem tells the truth when the indicator does not. Above ground this is the standard build; that is the whole argument for OS&Y. Ductile iron, fusion-bonded epoxy, EPDM-encapsulated wedge, 200 psi class, DN40–DN600, UL/FM listing on request. Buried, the rising stem and yoke are the wrong answer — take the NRS version.
General Specifications
Size RangeDN40 – DN600
Design StandardAWWA C509 / C515
End ConnectionDouble flanged
Flange DrillingANSI B16.1 Class 125
Stem TypeRising stem (OS&Y)
OperationHandwheel (electric / pneumatic actuator on request)
ServiceWater and fire-protection mains
Max. Working Temperature70 °C standard (EPDM) — NBR for 80 °C, FKM for up to 150 °C on request
Pressure RatingPN10 / PN16
Materials & Coating
Body / BonnetDuctile iron GGG40 / GGG50; duplex 2205 / 2507 available on request
WedgeDuctile iron core, EPDM-encapsulated
StemStainless steel (grade per order)
SeatEPDM standard; NBR on request
CoatingFusion-bonded epoxy, internal and external
Design Features
IndicationVisual open / closed via rising stem
MarketSaudi / GCC fire-protection mains
Pressure classPN25 on request
Applications
Fire protection risers Plant piping Pump discharge
More from this series
Related guides
