Cast Steel Metal to Metal Seat Trunnion Ball Valve
High Temperature Service
General soft seat ball valve working temperatureis limited uo to 400° F, but metal-seat ball valves are guaranteed for a maximum service temperature of 800° F.
Low Pressure Reliable Sealing
NIPO metal-seat ball valves adopt seat spring structure, which can push upstream seat tightly against the ball surface creating a reliable sealing even if extremely low pressure
Pressure Test
Metal-seat ball valves maximum allowable seat
Leakage:
Air: ANSI/FC 170-2 CLASS V
Absolute Fire Safe Guarantee
Metal-to-metal contact is designed between ball and seat, where is unconditional fire safe function. Flexible graphite gasket can prevent fluid leakage from between body & seat or body & bonnet even if high temperature environments to reach fire-safe purpose. In addition, other sealing components such as stem packing can also reach fire-safe function and prevent external leakage. So all parts of valve will not be damaged by high temperature service.
Blow-out Proof Stem & Anti-Static Device
As general ball valves, metal-seated ball valves are provided with blow-out proof stem &anti-static device.
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No. |
Part |
Material |
1 |
Body |
A216-WCB A352-LCB A351-CF8,CF8M,CF3,CF3M Duplex |
2 |
Seat |
ASTM A182-F6+STL,F304+STL,F316+STL,F316L+STL |
3 |
Antistatic Spring |
Stainless Steel SS316 |
4 |
Thrust Washer |
PTFE PPL |
5 |
Screw |
ASTM A193-B7,B8 |
6 |
Limited Plate |
1015+Cr Carbon Steel+Cr |
7 |
Lever |
A216-WCB |
8 |
Gland Flange |
A216-WCB A351-CF8 |
9 |
Packing |
Graphite PTFE |
10 |
Stem |
A182-F6,F304,F316,F316L,F304L,17-4PH,F51 |
11 |
Body Gasket |
Stainless Steel+PTFE SS316+PTFE |
12 |
Ball |
ASTM A182-F6+N,F304+N,F316+N,F304L+N,F51+N |
13 |
Seat Gasket |
ASTM A182-F6,F304,F316,F316L |
14 |
Bonnet |
A216-WCB A352-LCB A351-CF8,CF8M,CF3,CF3M |
15 |
Seat Spring |
Inconel X-7505 SS304 SS316 |
16 |
Seat Sealing |
Graphite |
17 |
Stud |
ASTM 193-B7,B7M,B8,B8M |
18 |
Nut |
ASTM 194-2H,2HM,8,8M |