Cast Steel Trunnion Mounted Ball Valves

Cast Steel Trunnion Mounted Ball Valves

Cast Steel Trunnion Mounted Ball Valves

• Upstream sealing, Self relieving seat
• Double block and bleed
• Fire safe design, Anti-static device, Blow-out proof stem
• Injection Port for seat & stem, Drain and Vent Ports
• 2-P or 3-Pc split body, Bolted Body

Cast Steel Trunnion Mounted Ball Valves

• Design - API 6D/ASME B16.34
• Face to Face - ASME B16.10/API 6D
• End to End - ASME B16.10/API 6D
• BW End - ASME B16.25
• Test - API 598/BS 6755
• Fire Safe Design - API 607/API 6FA
• Special - NACE MR-01-75

Cast Steel Trunnion Ball Valves Drawing

Material List of Cast Steel Trunnion Ball Valves

No.	Part Name	Carbon Steel	Stainless Steel
1	Body	A216 WCB	A351 CF8	A351 CF8M
2	Bonnet	A216 WCB	A351 CF8	A351 CF8M
3	Ball	A105+ENP	A182 F304	A182 F304M
4	Anti-fire packing	Graphite	Graphite	Graphite
5	Seat	PTFE/NYLON/MOLON/PEEK/PPL
6	Seat support ring	A105+ENP	A182 F304	A182 F304M
7	O-ring	VITON	VITON	VITON
8	Spring	17-7PH	17-7PH	17-7PH
9	O-ring	VITON	VITON	VITON
10	Anti-fire gasket	SS+Graphite	SS+Graphite	SS+Graphite
11	Hexagon nut	A194 2H	A194 8	A194 8M
12	Sealant injection valve	Combined parts	Combined parts	Combined parts
13	Check valve	Combined parts	Combined parts	Combined parts
14	Air release valve	Combined parts	Combined parts	Combined parts
15	Anti-static device	Combined parts	Combined parts	Combined parts
16	Stud	A193 B7	A320 B8	A320 B8M
17	Flat key	ANSI 1905	ANSI 1045	ANSI 1045
18	Stem	A182 F6a	17-4PH	17-4PH
19	Sliding bearing	Steel+PTFE	Steel+PTFE	Steel+PTFE
20	Thrust bearing	PTFE	PTFE	PTFE
21	O-ring	VITON	VITON	VITON
22	O-ring	VITON	VITON	VITON
23	Anti-fire gasket	SS+Graphite	SS+Graphite	SS+Graphite
24	Seal gland	A105+ENP	A182 F304	A182 F316
25	Screw	A193 B7	A320 B8	A320 B8M
26	Packing	Graphite	Graphite	Graphite
27	Packing gland	A182 F6a	A182 F6a	A182 F6a
28	Lower cover	A105+ENP	A182 F304	A182 F304
29	Stud	A193 B7	A320 B8	A320 B8M
30	Hexagon nut	A1942H	A194 8	A194 8M
31	Drain valve	Combined parts	Combined parts	Combined parts

Remarks

• Body Material: WCB, LCB, LCC, CF8, CF8M, CF3, CF3M, MONEL etc. 
• Seat Material: PTFE, Nylon, PEEK, PPL, Molon, Develon, Delrin, RPTFE 
• O-ring Seals: NBR, Viton A, Viton AED, EPDM, Viton B 
• Stem/Ball/Seat Ring: 304, A105+ENP, 17-4PH, 4140+ENP, 316, 304L, 316L, LF2+ENP, 13Cr/Hard Cr, F51 
• End Connection - Flange Ends/Butt Welding Ends

Trunnion Mounted ball valves Features and Applications

China Trunnion ball valves Features

1 double blocking and emissions: Trunnion Mounted ball valves spring preload floating seat, regardless of when the valve is fully open or fully closed state, on the downstream side of the valve seat to block fluid, body cavity through the discharge valve retentate drain.

2, automatic pressure relief function: the valve body cavity remain medium temperature caused when abnormal pressure, without going through the safety valve, and can function alone automatic pressure relief valve, which valve to ensure safety in the transportation of liquid medium very important.

3, fire safety structure: valves are equipped with fire safety features, its design and manufacture are to follow API 607 ​​and API 6FA specifications.
advantage

1, the sealing grease Emergency Ambulance: Due to foreign matter or medium fire accidents caused by failure of the valve seat seal, greasing valve provides a fast connection to the grease gun, pump quickly and easily import sealant is injected into the seating area, alleviate leakage.

2, reliable stem sealing and low operating torque: In addition to setting the standard outer sealing ring, packing gland also set O-ring seal to ensure a double stem seal reliability; addition of graphite filler and sealant stem leakage after injection so that the fire to a minimum. Stem sliding bearings and thrust bearings so that the valve is easy to operate.

3, full bore or reduced diameter: may need to use full bore or reduced diameter structure. Full Bore Valve flow aperture consistent with the internal diameter of the pipeline, the pipeline to facilitate cleaning.

4, the valve stem can be lengthened: required installation or operation, the valve stem can be lengthened. Plus pole ball, especially for city gas and other needs of underground pipeline laying the occasion. Extended stem size is determined according to customer needs.

5, flexible operation: the use of having a small coefficient of friction and good self-lubricating bearings of the valve seat and the valve stem, greatly reducing the valve operating torque. Therefore, even without providing a seal grease circumstances, it can be flexible and comfortable for long-term operation of the valve.

Trunnion ball valves Applications

Trunnion Mounted ball valve suitable for Class150 ~ Class1500, PN16 ~ PN100, JIS 10K ~ various pipeline JIS 20K, suitable temperature: -196 ~ 350 ℃, used to cut off or connected line of medium, use of different materials, can be respectively, for conveying water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea, etc., are widely used in petroleum refining, long-distance pipelines, chemical, paper, pharmaceuticals, water, electricity, municipal services, and steel. Trunnion Mounted ball valve driven approach to worm gear, manual, pneumatic or electric. Usually Trunnion Mounted ball valve flange connection, welded connection can also be used.

This is from China Ball Valves website support:Trunnion Mounted ball valves Features and Applications

Trunnion Mounted ball valves performance advantages

1, Trunnion Mounted ball valves effortless operation: the upper and lower ball bearings to reduce friction, eliminates the inlet pressure push the ball with the sealing seat and a huge load caused the seal excessive torque.

2, Trunnion ball valves reliable sealing: PTFE gasket material embedded in the single stainless steel seat, the end of a spring metal seat seals ensure adequate preload, the valve sealing surface in the course of wear, under the action of the spring valve continue to ensure good sealing performance.

3, structural fire protection: In order to prevent the emergence of sudden heat or fire, burned polytetrafluoroethylene seals, there is a greater leakage, and contribute to the fire, the fire is set between ball and valve seat seal ring, when burned in the ring, under spring force, the valve seat ring seal on the ball quickly to form a metal to metal seal, play a certain degree of sealing effect. Fire Test accord APl6FA and APl607 standards.

4, automatic pressure relief function: When the medium pressure in the valve chamber stagnation abnormally elevated than the spring pre] force, the seat back from the sphere to achieve the effect of automatic pressure relief after relief seat automatically reset.

5, the discharge line: the upper and lower body are set to vent, you can check whether the seat leakage occurs at work, the valve is fully open or fully closed, relieved pressure in the chamber can be directly replace the packing; cavity can be discharged retentate, reduce pollution of the media valve.

Trunnion Mounted ball valves reviews

Trunnion Mounted ball valve is a new generation of high-performance ball valve, suitable for long distance pipelines and general industrial pipeline, its strength, safety, resistance to harsh environments, etc. are designed for a special consideration for a variety of corrosive and non-corrosive media .

Compared with the floating ball valves, work, force the valve before the fluid pressure on the ball is passed to produce all the bearings, so that the ball does not move to the seat, so the seat does not put too much pressure, so Trunnion Mounted ball valve torque is small, seat deformation, stable sealing performance, long life, suitable for high pressure, large diameter occasions. Advanced spring pre-seat assembly, with self-tightening properties upstream seal achieve. Each valve has two seats in each direction can be sealed, so the installation does not flow restriction is bidirectional. This valve is usually installed horizontally.

There are two type Trunnion Mounted ball and three type two body structure, bolted flange sealing with PTFE inserts into the stainless steel circle, a spring steel ring to ensure the rear seat close to the ball, remain sealed. Upper and lower stems are equipped with PTFE bearings, reducing friction and effortless operation, with a small shaft bottom tabs to ensure access at the position of the ball and seal. Full Bore: valve flow aperture consistent with the internal diameter of the pipeline to pipeline cleaning.