water stop valve

main material:

1 body:WCB/stainless steel

2 bonnet: WCB

3 stem: 13Cr/A182-F304

4 disc: 2Cr13/A182-F304

5 sealing surface: STL

6 paking: flexible graphite/soft-iron

7 the seal seat: F304/2Cr13

8 valve cover: A216-WCB/A351-CF8

9 packing plate: CF8/A216-WCB

10 bolt: A193-B7

Back seating design

All our globe valve have the hack seating design. In most cases, the carbon steel globe valve is fitted with renewable back seat. For stainless steel globe valve, the back seat is machined directly in the bonnet or is machined after welding. When the globe valve is at fully open position, the sealing of the back seat can be reliable. However, as per the requirement of API, it is not advisable to add or change packing by the mean of back seating when the valve is pressure containing.

application

1 valve design and manufacturing requirements in accordance with BS1873

2 valve pressure and temperature basis, by the provisions of ANSI B 16.34

3 the connection flange in accordance with the provisions of B16.5

4 the valve according to API598 inspection and acceptance requirements.