DIN Cast Steel Bellows Seal Gate Valve

Product Details
Application: Industry, Powerstations, Flue gas purification plant, processing technology, gas supply, vapour facilities, recycling facilities, vacuum facilities, hot water, heating technology, district heating, thermal oil applications, general plant manufacturing, etc. (other applications on request)
Medium : Steam, gases, hot water, thermal fluids, hot oil, process water, vacuum facilities, ammonia etc.(other flow media on request)
Materials : WCB, WC6,SS304,SS316
Bellows materials: SS304, SS316,SS316L,SS310, Hastelly C.
Size range : DN50-DN600
Class: PN16-PN160
Temperature : ≤425 ºC
Fig No. : WJ41H 
Technical specification:
Design Standard: DIN 3352
Face To Face: DIN 3202
Flange ends: EN 1092-1/DIN 2544
Test & Inspection: ISO 5208/EN12266/DIN 2545

Features and benefits
Long cycle life bellows (2000 cycles) in Gr. 321 (stainless), Inconel for special applications, (may be replaced with Monel trim to resist corrosion or Hastelloy C for chlorine service).
Improved body-bonnet joint: Graphite reinforced with SS foil gasket for Class 150 valves. Fully-encased, spiral wound graphite-filled Gr. 316 (stainless) gasket for PN40.
Bolted body-bonnet for fast serviceability. Hermetically-sealed bonnets available for PN40.
Two or three section bellows assembly.
Non-rotating stemprevents torsion of bellows.
Two secondary stem seals: a) Backseat in open position; b) Graphite packing.
Welded-in seat hardfaced with CoCr alloy.Wedge hardfaced with CoCr alloy for long life.
Seating faces hardfaced with CoCr alloy, ground and lapped.

Qingdao Haiying valves could manufacture/supply Resilient seated and Multi Hard-seal buttefly valve and ball valves used for Lubricating oil,fresh oil,fresh water,sea water ,compressed air pipe line and etc.  There are CNC lathes ,CNC milling machines,CNC boring machines machining ,valve automatic testing bench ,spray painting line and other advanced equipment in our outsourced factory.so it could ensure delivery on time and high quality.we sincerely welcome all friends to visit our company for seeking cooperation in creating a win-win future
FAQ

1. Could you produce customized product?

Yes,we could do various customized valves conform to require drawing or sample.

     2.  How to ensure the valve quality??

a.Firstly,we inspect the casting when get it one by one and will abandon it if defect castings.such as blowholes&pinholes is defects castings.  

b.We will inspect and check about valve dimension after machining.Allowable error to standard is 1.5mm for longth(above DN50 valves)

c.All items must be inspected by hydraulic test after assemble.and more important ensure that valves are inspected by operator in according with hydraulic test criteria including pressure&time.

d.Coat oil for anti-rust inside of the valve body and paint checking.

     3. How is your valve warranty period?

Usually,the warranty period for valves is 14 monthes,however,we will solve or replace new valves once find fault items to our old stock customers no matter how long.