DIN Resilient Seated Gate Valve
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Design/Production Description: 1.Design confirms to: DIN3352, BS5163, SABS664/665
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(WATERWORKS AND WASTE WATER)
Valves are manufactured and tested in according to AWWA C509, BS563:86-A,B ,DIN 3352-4 ISO 7259-A-B, TIS 1413-2540 ect. Face to face comply with ANSI B16.10,BS 5163, DIN 3202 F4 & F5, ISO 5752 Series 3/14/15/19 Rated pressure PN10,16,25,straight thorugh bore type non rising stem and rising stem OS&Y. Cost savingfeature is replaceable wedge without taking the valve out from the pipeline. Valves are designed especially for potable water, waste water and suitable for all types of water and air.
SIZE : 50 mm.- 400 mm. 2” – 16”
FEATURES
- Vulcanized encapsulated resilient wedge , bubble tight shut-off , low head and loss.
- Valve ends can be flanged , spigot , socket , mechanical joint , grooved and shoulder.
- Flanged drilling to suit ANSI B16.1 , BS4504 , BS10 , BS 4772 , ISO , AS2129 ,DIN , JIS and etc.
- Various types of operators such as handwheel , chainwheel , spur gear , bevel gear, pneumatic , hydraulic and electric actuator can be provided upon requested.
- Special accessories like by-pass unit , valve locking device , tapped bosses , pipe cover , indicator and limit switches are also available.
RESILIENT WEDGE GATE VALVES
shall conform to the latest revision of AWWA Standard C-515 covering resilient seated gate valves for water supply service.
The valves shall have a ductile iron body, bonnet, and o-ring plate. The wedge shall be totally encapsulated with rubber.
The sealing rubber shall be permanently bonded to the wedge per ASTM D429.Valves shall be supplied with o-ring seals at all pressure retaining joints. No flat gaskets shall be allowed.
The valves shall be either non-rising stem or rising stem, opening by turning left or right, and provided with 2" square operating nut or a handwheel with the word “Open” and an arrow to indicate the direction to open.
Stems for NRS assemblies shall be cast bronze with integral collars in full compliance with AWWA. OS & Y (rising stems) shall be bronze. All stems shall operate with bronze stem nuts independent of wedge and of stem (in NRS valves). Stainless steel stems or stem nuts are not allowed. NRS
stems shall have two o-rings located above thrust collar and one o-ring below. Stem o-rings shall be replaceable with valve fully opened and subjected to full pressure. The NRS stems on 4" - 12" shall also have two low torque thrust bearings located above and below the stem collar to reduce friction during operation.
Waterway shall be smooth, unobstructed and free of all pockets, cavities and depressions in the seat area.Valves 4" and larger shall accept a full size tapping cutter.
The body, bonnet, and o-ring plate shall be fusion-bond epoxy coated, both interior and exterior on body and bonnet. Epoxy shall be applied in accordance with AWWA C-550 and be NSF 61 approved. Each valve shall have maker’s name, pressure rating, and year in which it was manufactured cast in the body. Prior to shipment from the factory, each valve shall be tested by hydrostatic pressure equal to the requirements of AWWA C-515 (and ULFM where applicable).
