Trusted Trunnion Ball Valve Manufacturer
NTVAL offers durable Trunnion Ball Valves for industrial use, ensuring top performance through strict quality control. With comprehensive technical support, we deliver reliable, tailored solutions for your projects. Choose NTVAL for high-performance valves.
Reliable Trunnion Ball Valve
The large trunnion design maintains central positioning even under high working pressures. The independent floating, spring-loaded seats offer a tight seal, even at low differential pressures. The bolted body design simplifies service and maintenance, incorporating either double O-rings or a combination of O-rings and gaskets. These valves are suitable for both buried and above-ground installations.
Quality Control
The PMI test verifies that the trunnion ball valve’s materials match the specifications, confirming they are the correct metals for long-lasting performance.
PMI Test
The sealing test checks that the trunnion ball valve prevents leaks by simulating pressure, confirming it securely holds fluids in real conditions.
Sealing Test
The low emission test measures how effectively the trunnion ball valve limits gas leaks, helping to reduce harmful emissions during operation.
Low Emission Test
The impact test evaluates the trunnion ball valve’s strength by applying force, confirming it can handle physical stress without cracking or breaking.
Impact Test
Dimension inspection checks that each part of the trunnion ball valve is made to exact measurements, allowing proper fit and smooth operation.
Dimension Inspection
The painting thickness test checks that the trunnion ball valve has a proper coating, protecting it from rust and damage in harsh environments.
Painting Thickness Test
PT testing applies liquid dye to detect small cracks in the trunnion ball valve, confirming that no hidden flaws could impact its safety or performance.
PT
Material inspection verifies that all materials in the trunnion ball valve meet necessary standards for reliable performance and long-lasting durability.
Material Inspection
Our Valve Applications in Key Industries
Discover how our advanced valve solutions improve flow control, delivering enhanced efficiency, safety, and strict quality assurance.
Trunnion ball valves provide reliable performance in chemical processing, offering leak-free operation and durability under harsh chemical conditions.
Chemical Processing
Trunnion ball valves manage high-pressure, corrosive fluids effectively in petrochemical plants, making them a reliable option for efficient operations.
Petrol Chemical
Trunnion ball valves operate safely under extreme temperatures and pressures in the O.P.G. and nuclear industries, providing dependable control and durability.
O.P.G & Nuclear
In the pulp industry, trunnion ball valves handle abrasive materials well, offering reliable service that prevents equipment damage and maintains productivity.
Pulp
The mining industry benefits from trunnion ball valves’ ability to withstand abrasive and high-pressure environments, making them essential for safe material flow.
Mining
Trunnion ball valves offer reliable control in water and sewage systems, delivering long-lasting, leak-free service for efficient fluid management.
Water & Sewage
Trunnion ball valves handle high-temperature steam effectively, making them an excellent choice for industries requiring precise control in steam systems.
Steam System
Boiling systems benefit from trunnion ball valves’ ability to manage pressure and temperature consistently, providing safe, reliable operation under tough conditions.
Boiling System
Get More Versatile Valve
General Design Features
- Three-piece body design
- Double block and bleed
- Trunnion supported design reduces operating torque
- Antistatic device for grounding of the ball, stem and body
- Two sets of O-rings plus fire safe stem packing prevents leakage
- Corrosion resistant low friction bearings Inconel seat springs
- Sealant injection fittings for emergency stem or seal sealing
- Direct mount top works pad for actuator or gear operator
- API Spec.1,6D,6FA and 607
- ASME Section III Div.1-NCA 4000 BS 5351, 5750, and 6755
- Locking device upon request
- NACE MR0175/ISO 15156
- Anti-blowout trunnion stem design
Technical Seating Feature
Double Piston Seat Design
Upstream Seat
In a double piston seat design, the upstream seat works through a “piston effect.” Here’s how it works:
- The line pressure on the seat area (A1) is different from the pressure on the seat area (A2).
- This difference in pressure (D1), combined with the line pressure, creates a force that pushes the seat against the ball surface.
- This force results in a tight and effective seal.
Downstream Seat
The downstream seat functions similarly but with body cavity pressure:
- When the pressure in the body cavity is higher than the downstream pressure, it acts on the seal area (A4).
- The pressure difference (D2) pushes the downstream seat against the ball.
- This ensures a positive seal on the downstream side.
Double Block and Bleed
The double block and bleed feature is available in all seat design configurations. Here’s how it works:
- When the ball is in the closed position, the pressure in the body cavity can be reduced to zero by opening the bleed valve.
- You can then drain the fluid through the drain plug.
- Each seat works independently, creating a tight shut-off seal on both the upstream and downstream sides of the ball.
Double Piston Seat
If the upstream seat leaks, the downstream seat keeps the valve sealed tightly. It uses pressure to push against the ball, ensuring the valve stays closed and working properly.
Self-Relieving Seat Design
- Upstream Seat: The line pressure creates a “piston effect,” which pushes the seat tightly against the ball. Springs behind the seat add extra pressure, ensuring a solid seal.
- Downstream Seat: If the pressure in the body gets too high, it automatically releases past the downstream seat. This setup removes the need for a separate relief valve, making pressure control simple and efficient.
Design Features
Double Sealed Envelope Connections
Double O-rings or a combination of an O-ring and a fire-safe gasket are used on body/adapter connections to provide reliable sealing. This design makes these valves suitable for both above-ground and below-ground service.
Heavy Duty Bearings
Trunnions are supported by heavy duty Tefloncoated Steel Bearings. The thrust load on the ball is supported by large trunnions mounted within captured trunnion blocks, resulting in low operating torque and seat wear.
Antistatic Device
A spring between the trunnion and the ball or between the stem and the gland plate permits electrical continuity between all valve components.
Supply Ball Valves By Number of Pieces
API- American Petroleum Institute
- 6D Specification for pipeline valves,
- RP6F Recommended practice for fire testing of valves,
- 6FA Specification for fire testing of valves,
- 598 Valve inspection and test.
- 605 Large diameter carbon steel flanges.
- 607 Fire test for soft seated quarter-ture valves.
ASME/ANSI- American National Standard Institute
- B 16.5 Steel pipe flanges and flanged fittings.
- B 16.10 Face-to-face and end-to-end dimensions of ferrous valves.
- B 16.25 Butt welding ends.
- B 16.34 Steel valves-Flanged and butt welding ends.
- B 16.47 Steel Flanges.
- B 31.3 Chemical plant and petroleum refinery piping
- B 31.4 Liquid petroleum transportation piping systems.
- B 31.8 Gas transmission and distribution piping systems.
- B 46.1 Surface texture.
ASTM-American Society for Testing Materials
- ISO-International Organization for Standardization
- ISO 9001:2000 Quality systems-model for quality assurance in design/development, production, installation, and servicing.
- ISO 5211 Top works Mounting Dimensions
- ISO 15156 For use IN H S containing environments 22in oil and gas production
British Standard
- BS 1503 Specification for steel forgings for pressure purposes.
- BS 1504 Specification for steel castings for pressure purposes.
- BS 1560 Steel pipe flanges and flanged fittings.
- BS 2080 Face-to-face, center-to-face, and center-to-end dimensions of flanged and butt-welding end steel valves for the petroleum, petrochemical, and allied industries.
- BS 4504 Flanges and boltings for pipes, valves, and fittings
- BS 5146 Inspection and test of steel valves for the petroleum, petrochemical, and allied industries.
- BS 5351 Steel ball valves for the petroleum, petrochemical, and allied industries.
- BS 5750 Quality system.
- BS 6755 Testing of valves.
MSS-Manufacturers Standardization Society
- SP 6 Standard finishes for contact faces of pipe flanges and connecting-end flanges of valves and fittings.
- SP 25 Standard marking system for valves, fittings, flanges, and unions.
- SP 45 Bypass and drain connection standard.
NACE-National Association of Corrosion Engineers
- MR 0175 Sulfide stress cracking resistant metallic materials for oil field equipment.
Three Piece Trunnion Parts Configuration 2" FP-36" FP, Class 150, 300, 600, 900, 1500 & 2500
Buttweld End Pipe Schedule
| Pipe | Nominal Pipe Size (in.) ●Schedule Code | ||||||||||||
| Description | 2 | 3 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 |
| Outside Dia. (in.) | 2.375 | 3.5 | 4.5 | 6.625 | 8.625 | 10.75 | 12.75 | 14 | 16 | 18 | 20 | 22 | 24 |
| (STD)Standard | – | – | 0.237 | 0.28 | 0.322 | 0.365 | 0.375 | 0.375 | 0.375 | 0.375 | 0.375 | 0.375 | 0.375 |
| Schedule 40 | 0.154 | 0.216 | 0.237 | 0.28 | 0.322 | 0.365 | 0.406 | 0.438 | 0.5 | 0.562 | 0.593 | – | 0.687 |
| XS | 0.218 | 0.3 | 0.337 | 0.432 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | – | – | 0.5 | – |
| Schedule 80 | 0.218 | 0.3 | 0.337 | 0.432 | 0.5 | 0.593 | 0.687 | 0.75 | 0.843 | 0.937 | 1.031 | 1.125 | 1.218 |
| Schedule 160 | 0.343 | 0.438 | 0.531 | 0.718 | 0.906 | 1.125 | 1.312 | 1.406 | 1.593 | 1.781 | 1.968 | 2.343 | |
| XXS | 0.436 | 0.6 | 0.674 | 0.864 | 0.875 | 1 | 1 | – | – | – | – | – | – |
Component Parts 2", 3" & 4", Class 600, 900 & 1500
Parts List
| Part No | Description | Part No | Description |
| 1 | Body | 19 | StemSub-Seal |
| 2 | Adapter | 20 | Seat Seal |
| 3 | Bonnet | 21 | Seat Seal Backup |
| 4 | Ball | 22 | Seat Sub-Seal |
| 5 | Stem | 23 | Stud Body |
| 6 | Lower Trunnion | 24 | Nut Body |
| 7 | Seat Assembly | 25 | Cap Screw, Bonnet |
| 8 | Top Cover | 26 | Cap Screw, Top Cover |
| 9 | Seat Springs | 27 | Cap Screw. Lower Trunnion |
| 10 | Stem Bearing | 28 | Thrust Bearing |
| 11 | Lower Trunnion Bearing | 29 | Bleed/Drain Valve |
| 12 | Adapter Primary Seal | 30 | Injection Fitting |
| 13 | Adapter Sub-Seal | 31 | Ball Check |
| 14 | Bonnet Primary Seal | 32 | Drain Plug |
| 15 | Bonnet Sub-Seal | 34 | Key |
| 16 | Lower Trunnion Primary Seal | 36 | Alignment Pin. Bonnet |
| 17 | Lower Trunnion Sub-Seal | 42 | Antistatic Pin |
| 18 | Stem Seal | 43 | Antistatic Spring |
Component Parts 6" - 12", Class 600
Parts List
| Part No | Description | Part No | Description |
| 1 | Body | 19 | StemSub-Seal |
| 2 | Adapter | 20 | Seat Seal |
| 3 | Bonnet | 21 | Seat Seal Backup |
| 4 | Ball | 22 | Seat Sub-Seal |
| 5 | Stem | 23 | Stud Body |
| 6 | Lower Trunnion | 24 | Nut Body |
| 7 | Seat Assembly | 25 | Cap Screw, Bonnet |
| 8 | Top Cover | 26 | Cap Screw, Top Cover |
| 9 | Seat Springs | 27 | Cap Screw. Lower Trunnion |
| 10 | Stem Bearing | 28 | Thrust Bearing |
| 11 | Lower Trunnion Bearing | 29 | Bleed/Drain Valve |
| 12 | Adapter Primary Seal | 30 | Injection Fitting |
| 13 | Adapter Sub-Seal | 31 | Ball Check |
| 14 | Bonnet Primary Seal | 32 | Drain Plug |
| 15 | Bonnet Sub-Seal | 34 | Key |
| 16 | Lower Trunnion Primary Seal | 36 | Alignment Pin. Bonnet |
| 17 | Lower Trunnion Sub-Seal | 42 | Antistatic Pin |
| 18 | Stem Seal | 43 | Antistatic Spring |
Component Parts 6"- 12", Class 900 & 1500 14" & Larger, All Class
Parts List
| Part No | Description | Part No | Description |
| 1 | Body | 18 | Stem Seal |
| 2 | Adapter | 19 | Stem Sub-Seal |
| 3 | Bonnet | 20 | Seat Seal |
| 4 | Ball | 21 | Seat Seal Backup |
| 5 | Stem | 22 | Seat Sub-Seal |
| 6 | Trunnion Block | 23 | Stud, Body |
| 7 | SeatAssembly | 24 | Nut. Body |
| 8 | Top Cover | 25 | Cap Screw, Bonnet |
| 9 | Seat Springs | 26 | Cap Screw, Top Cover |
| 10 | Stem Bearing | 28 | Thrust Bearing |
| 11 | Lower Trunnion Bearing | 29 | Bleed/Drain Valve |
| 12 | Adapter Primary Seal | 30 | Injection Fitting |
| 13 | Adapter Sub-Seal | 31 | Ball Check |
| 14 | Bonnet Primary Seal | 32 | Drain Plug |
| 15 | Bonnet Sub-Seal | 34 | Key |
| 16 | Lower Trunnion Primary Seal | 36 | Alignment Pin. Bonnet |
| 17 | Lower Trunnion Sub-Seal | 46 | Trunnion Block Pin |
Three Piece Trunnion Mounted Ball Valve
Class 150/300 Dimension
- Three Piece Body, Full Port or Reduced Bore
- Trunnion Mounted, Fire Safe, Blow-out Proof Stem
- Anti-static Device, Cavity Relieving Seats
- NACE MR-01-75, Optional Locking Device
- Designed to ASME B16.34, API 6D
| Face to Face | API 6D |
| End Flange | ASME B16.5 |
| Buttweld | ASME B16.25 |
| Class | ASME CL150/300 |
CLASS 150 DIMENSION
SIZE (in.) | A | B | B1 | C | D | E | F | G | H | I | ||
| RF | RTJ | WE | Unit:inch | |||||||||
| 14 | 27 | 27.5 | 30 | 13.3 | 13.3 | 21 | 15.7 | 15.3 | 25.1 | 18.5 | 20.4 | 23.6 |
| 16 | 30 | 30.5 | 33 | 15.3 | 15.3 | 23.5 | 16.7 | 17.7 | 28 | 19.4 | 18.7 | 27.6 |
| 20×16 | 36 | 36.5 | 39 | 15.3 | 19.3 | 27.5 | 16.7 | 17.7 | 28 | 19.4 | 18.7 | 27.6 |
| 18 | 34 | 34.5 | 36 | 17.2 | 17.2 | 25 | 19.1 | 19.5 | 31.9 | 22.3 | 22.6 | 27.6 |
| 20 | 36 | 36.5 | 39 | 19.3 | 19.3 | 27.5 | 21.1 | 21.4 | 34.1 | 24.3 | 22.6 | 27.6 |
| 24×20 | 42 | 42.5 | 45 | 19.3 | 23.3 | 32 | 21.1 | 21.4 | 34.1 | 24.3 | 22.6 | 27.6 |
| 24 | 42 | 42.5 | 45 | 23.3 | 23.3 | 32 | 24.3 | 23.2 | 40.4 | 27.8 | 23.3 | 31.5 |
SIZE (in.) | A | B | B1 | C | D | E | F | G | H | I | ||
| RF | RTJ | WE | Unit:inch | |||||||||
| 14 | 30 | 30.6 | 30 | 13.3 | 13.3 | 23 | 15.7 | 15.3 | 18.5 | 25.1 | 20.4 | 23.6 |
| 16 | 33 | 33.6 | 33 | 15.3 | 15.3 | 25.5 | 16.7 | 16.7 | 19.4 | 28 | 22.6 | 27.6 |
| 20×16 | 39 | 39.8 | 39 | 15.3 | 19.3 | 30.5 | 16.7 | 16.7 | 19.4 | 28 | 22.6 | 27.6 |
| 18 | 36 | 36.6 | 36 | 17.2 | 17.2 | 28 | 19.2 | 19.6 | 22.4 | 32.3 | 22.6 | 27.6 |
| 20 | 39 | 39.8 | 39 | 19.3 | 19.3 | 30.5 | 21.2 | 21.6 | 24.7 | 34.4 | 23.3 | 31.5 |
| 24×20 | 45 | 45.9 | 45 | 19.3 | 23.3 | 36 | 21.2 | 21.6 | 24.7 | 34.4 | 23.3 | 31.5 |
| 24 | 45 | 45.9 | 45 | 23.3 | 23.3 | 36 | 24.6 | 23.4 | 29.3 | 40.9 | 27.3 | 35.4 |
Class 600 Dimension
- Three Piece Body, Full Port or Reduced Bore
- Trunnion Mounted, Fire Safe, Blow-out Proof Stem
- Anti-static Device, Cavity Relieving Seats
- NACE MR-01-75, Optional Locking Device
- Designed to ASME B16.34, API 6D
| Face to Face | API 6D |
| End Flange | ASME B16.5 |
| Buttweld | ASME B16.25 |
| Class | ASME CL600 |
CLASS 600 DIMENSION
SIZE (in.) | A | B | B1 | C | D | E | F | G | H | I | ||
| RF | RTJ | WE | Unit:inch | |||||||||
| 2 | 11.5 | 11.6 | 11.5 | 2 | 2 | 6.5 | 6.1 | 4.2 | 6.5 | 22.8 | – | – |
| 3X2 | 14 | 14.1 | 14 | 2 | 3 | 8.3 | 6.1 | 4.2 | 6.5 | 22.8 | – | – |
| 3 | 14 | 14.1 | 14 | 3 | 3 | 8.3 | 6.7 | 5.4 | 9 | 27.6 | – | – |
| 4X3 | 17 | 17.1 | 17 | 3 | 4 | 10.7 | 6.7 | 5.4 | 9 | 27.6 | – | – |
| 4 | 17 | 17.1 | 17 | 4.1 | 4.1 | 10.8 | 8 | 6.4 | 10.4 | 27.8 | – | – |
| 6X4 | 22 | 22.1 | 22 | 4.1 | 6 | 14 | 8 | 6.4 | 10.4 | 27.8 | – | – |
| 6 | 22 | 22.1 | 22 | 6 | 6 | 14 | 9.1 | 9.2 | 12.6 | 11.2 | 14.2 | 19.7 |
| 8X6 | 26 | 26.1 | 26 | 6 | 8 | 16.5 | 9.1 | 9.2 | 12.6 | 11.2 | 14.2 | 19.7 |
| 8 | 26 | 26.1 | 26 | 8 | 8 | 16.5 | 11.4 | 12.4 | 17 | 13.5 | 15 | 23.6 |
| 10X8 | 31 | 31.1 | 31 | 8 | 10 | 20 | 11.4 | 12.4 | 17 | 13.5 | 15 | 23.6 |
| 10 | 31 | 31.1 | 31 | 10 | 10 | 20 | 13 | 15.7 | 20.4 | 15.5 | 16.5 | 23.6 |
| 12X10 | 33 | 33.1 | 33 | 10 | 12 | 22 | 13 | 15.7 | 20.4 | 15.5 | 16.5 | 23.6 |
| 12 | 33 | 33.1 | 33 | 12 | 12 | 22 | 15.9 | 17.8 | 24.5 | 18.7 | 21.5 | 27.6 |
| 14X12 | 35 | 35.1 | 35 | 12 | 13.3 | 23.7 | 15.9 | 17.8 | 24.5 | 18.7 | 21.5 | 27.6 |
| 16X12 | 39 | 39.1 | 39 | 12 | 15.3 | 27 | 15.9 | 17.8 | 24.5 | 18.7 | 21.5 | 27.6 |
| 14 | 35 | 35.1 | 35 | 13.3 | 13.3 | 23.7 | 15.7 | 15.3 | 25.1 | 18.9 | 23.1 | 31.5 |
| 16 | 39 | 39.1 | 39 | 15.3 | 15.3 | 27 | 17.4 | 17.6 | 28.9 | 20.6 | 22.6 | 27.6 |
| 20X16 | 47 | 47.2 | 47 | 15.3 | 19.3 | 32.1 | 17.4 | 17.6 | 28.9 | 20.6 | 22.6 | 27.6 |
| 18 | 43 | 43.1 | 43 | 17.2 | 17.2 | 29.3 | 19.6 | 20.1 | 33.1 | 23.1 | 23.3 | 31.5 |
| 20 | 47 | 47.2 | 47 | 19.3 | 19.3 | 32 | 22.2 | 21.3 | 36.2 | 27 | 27.3 | 35.4 |
| 24X20 | 55 | 55.4 | 55 | 19.3 | 23.3 | 37 | 22.2 | 21.3 | 36.2 | 27 | 27.3 | 35.4 |
| 24 | 55 | 55.4 | 55 | 23.3 | 23.3 | 37 | 24.6 | 23.5 | 41.1 | 30.8 | 37.4 | 27.6 |
Three Piece Trunnion Ball Valve Ref. Weights
| SIZE (in.) | PORT | ANSI Class | Valve Only | With Handle | With G.O |
| Unit: Ibs. | |||||
| 2 | FP | 600 | 81 | 86 | 119 |
| 2 | FP | 900 | 114 | 118 | 168 |
| 2 | FP | 1500 | 169 | 173 | 223 |
| 2 | FP | 2500 | Consult Factory | ||
| 3 | RP | 600 | 96 | 101 | 134 |
| 3 | FP | 600 | 160 | 168 | 214 |
| 3 | RP | 900 | 147 | 152 | 201 |
| 3 | FP | 900 | 216 | 223 | 270 |
| 3 | RP | 1500 | 210 | 214 | 264 |
| 3 | FP | 1500 | 386 | 390 | 431 |
| 3 | RP/FP | 2500 | Consult Factory | ||
| 4 | RP | 600 | 216 | 223 | 270 |
| 4 | FP | 600 | 286 | 295 | 331 |
| 4 | RP | 900 | 288 | 296 | 342 |
| 4 | FP | 900 | 385 | 395 | 430 |
| 4 | RP | 1500 | 485 | 494 | 530 |
| 4 | FP | 1500 | 617 | 698 | |
| 4 | RP/FP | 2500 | Consult Factory | ||
| Note: Consult factory for sizes not shown. | |||||
| SIZE (in.) | PORT | ANSI Class | Valve Only | With Handle | With G.O |
| Unit: Ibs. | |||||
| 6 | RP | 600 | 368 | 377 | 413 |
| 6 | FP | 600 | 498 | – | 582 |
| 6 | RP | 900 | 529 | 538 | 574 |
| 6 | FP | 900 | 762 | – | 854 |
| 6 | RP | 1500 | 816 | – | 897 |
| 6 | FP | 1500 | 1157 | – | 1272 |
| 6 | RP/FP | 2500 | Consult Factory | ||
| 8 | RP | 600 | 604 | – | 688 |
| 8 | FP | 600 | 992 | – | 1082 |
| 8 | RP | 900 | 912 | – | 1004 |
| 8 | FP | 900 | 1344 | – | 1456 |
| 8 | RP | 1500 | 1356 | – | 1471 |
| 8 | FP | 1500 | 2149 | – | 2345 |
| 8 | RP/FP | 2500 | Consult Factory | ||
| 10 | RP | 600 | 1256 | – | 1346 |
| 10 | FP | 600 | 1653 | – | 1768 |
| 10 | RP | 900 | 1499 | – | 1611 |
| 10 | FP | 900 | 2010 | – | 2208 |
| 10 | RP | 1500 | 2628 | – | 2824 |
| 10 | FP | 1500 | 3440 | – | 3740 |
| 10 | RP/FP | 2500 | Consult Factory | ||
| 12 | RP | 600 | 1834 | – | 1949 |
| 12 | FP | 600 | 2535 | – | 2823 |
| 12 | RP | 900 | 2226 | – | 2424 |
| 12 | FP | 900 | 2865 | – | 3164 |
| 12 | RP | 1500 | 4156 | – | 4456 |
| 12 | FP | 1500 | 4012 | – | 4312 |
| 12 | RP/FP | 2500 | |||
| SIZE (in.) | PORT | ANSI Class | Valve Only | With Handle | With G.O |
| Unit: Ibs. | |||||
| 14 | FP | 150 | 1781 | – | 1979 |
| 14 | FP | 300 | 2380 | – | 2578 |
| 14 | RP | 600 | 2491 | – | 2779 |
| 14 | FP | 600 | 3020 | – | 3308 |
| 14 | FP | 900 | 3339 | – | 3537 |
| 16 | RP | 150 | 1610 | – | 1808 |
| 16 | FP | 150 | 2799 | – | 2997 |
| 16 | RP | 300 | 2332 | – | 2530 |
| 16 | FP | 300 | 2870 | – | 3064 |
| 16 | RP | 600 | 3042 | – | 3330 |
| 16 | FP | 600 | 3791 | – | 4084 |
| 160 | RP | 900 | 3947 | – | 4145 |
| 16 | FP | 900 | 4596 | – | 5072 |
| 16 | FP | 1500 | 9393 | – | 10,235 |
| Note:Allweights listed areestimated, Consult factory for sizes not shown. | |||||
| SIZE (in.) | PORT | ANSI Class | Valve Only | With Handle | With G.O |
| Unit: Ibs. | |||||
| 18 | FP | 150 | 2921 | – | 3214 |
| 18 | FP | 300 | 4634 | – | 4927 |
| 18 | FP | 600 | 5742 | – | 6218 |
| 18 | FP | 900 | 6614 | – | 7456 |
| 20 | RP | 150 | 2667 | – | 2865 |
| 20 | FP | 150 | 4805 | – | 5094 |
| 20 | RP | 300 | 4909 | – | 5202 |
| 20 | FP | 300 | 5608 | – | 6084 |
| 20 | RP | 600 | 4785 | – | 5431 |
| 20 | FP | 600 | 6130 | – | 6972 |
| 20 | RP | 900 | 6549 | – | 7391 |
| 20 | FP | 900 | 9614 | – | 10,456 |
| 24 | RP | 150 | 5343 | – | 5632 |
| 24 | FP | 150 | 7680 | – | 8156 |
| 24 | RP | 300 | 6063 | – | 6352 |
| 24 | FP | 300 | 7960 | – | 8802 |
| 24 | RP | 600 | 7475 | – | 8317 |
| 24 | FP | 600 | 12.125 | – | 12,995 |
| 24 | RP | 900 | 12.303 | – | 13,145 |
| 24 | FP | 900 | 15.5 | – | 16,370 |
Three Piece Trunnion Ball Valve Topworks (IN.) & Stem Torque Data (IN.-LBS.)
| SIZE (in.) | ANSI Class | A | B | C | D | E | F | G | H | I | J | K | L | M | N | W | Max Steam | Break | Torq.Express.(1) |
| Stud Sz. UNC | Hola Dia. | No. Of Holes | C.Line Bore | Bore Depth | Sheer Torq.ft.-lbs | Torq.in.-lbs | For P<=2160 PSI in.-lbs. (2)(3) | ||||||||||||
| 2 | 600 | 0.871 | – | 1.319 | 3.76 | 0.709 | 5.906 | 4.921 | 1/2-13 | 0.531 | – | – | 4 | 0.787 | 0.512 | *0.558 | 134 | 1314 | 0.409*P+ |
| 2 | 900 | 0.871 | – | 1345 | 3.858 | 0.709 | 5.906 | 4.921 | 1/2-13 | 0.531 | – | – | 4 | 0.787 | 0.512 | *0.558 | 135 | 1616 | 708.2 |
| 2 | 1500 | 1.103 | – | 1.988 | 4.094 | 1.063 | 5.906 | 4.921 | 1/2-13 | 0.531 | – | – | 4 | 0.787 | 0.551 | *0.746 | 306 | 2224 | |
| 3 | 600 | 1.378 | – | 2.01 | 4.429 | 0.787 | 6.24 | 5.433 | 1/2-13 | 0.531 | – | – | 4 | – | – | *0.994 | 405 | 4151 | 1.758*P+ |
| 3 | 900 | 1.378 | – | 2 | 4.941 | 0.945 | 6.713 | 5.433 | 1/2-13 | 0.531 | – | – | 4 | 0.807 | 500 | *0.994 | 630 | 5452 | 1548.75 |
| 3 | 1500 | 1.493 | – | 1.973 | 4.921 | 1.181 | 6.693 | 5.512 | 5/8-11 | 0.657 | – | – | 4 | 1.024 | 0.65 | *0.993 | 726 | 8062 | |
| 4 | 600 | 1.497 | – | 1.687 | 5.02 | 1.22 | 6.89 | 5.512 | 5/8-11 | 0.657 | 3.939 | 0.118 | 4 | 0.984 | 0.63 | *0.996 | 725 | 6043 | 2.319*P+ |
| 4 | 900 | 1.497 | – | 1.687 | 5.02 | 1.22 | 6.89 | 5.512 | 5/8-11 | 0.657 | 3.939 | 0.118 | 4 | 0.984 | 0.63 | *0.996 | 728 | 7759 | 2610.75 |
| 4 | 1500 | 1.774 | – | 2.402 | 5.925 | 1.22 | 8.268 | 6.496 | 3/4-10 | 0.787 | 5.12 | 0.118 | 4 | 1.181 | 0.787 | *1.247 | 1337 | 11.203 | |
| 6 | 600 | 1.931 | – | 2.179 | 4.921 | 1.299 | 6.909 | 5.512 | 5/8-11 | 0.657 | 3.939 | 0.118 | 4 | 1 | 0.669 | *1.247 | 1624 | 14.58 | 7.446*P+ |
| 6 | 900 | 1.992 | – | 1.991 | 4.921 | 1.378 | 8.287 | 6.496 | 3/4-10 | 0.787 | 5.12 | 0.118 | 4 | 1.181 | 0.787 | *1.247 | 1695 | 20.09 | 3559.47 |
| 6 | 1500 | 2.493 | – | 2.795 | 6.299 | 1.181 | 11.811 | 10 | 5/8-11 | 0.669 | 7.88 | 0.118 | 8 | – | – | *1.747 | 3722 | 31.147 | |
| 8 | 600 | 2.87 | 3.191 | 3.588 | 6.297 | 1.732 | 8.287 | 6.496 | 3/4-10 | 0.787 | 5.12 | 0.157 | 4 | 1.165 | 0.787 | 0.75 | 7460 | 22.628 | 11.535*P+ |
| 8 | 900 | 2.87 | 3.191 | 3.78 | 6.496 | 1.575 | 11.811 | 10 | 5/8-11 | 0.669 | 7.877 | 0.157 | 8 | – | – | 0.75 | 7460 | 31.164 | 5556.03 |
| 8 | 1500 | 2.87 | 3.191 | 3.299 | 6.496 | 1.575 | 11.811 | 10 | 5/8-11 | 0.669 | 7.877 | 0.118 | 8 | – | – | 0.75 | 7460 | 48.293 | |
| 10 | 600 | 3.24 | 3.613 | 3.581 | 6.9 | 0.986 | 11.319 | 10 | 5/8-11 | 0.657 | 7.877 | 0.118 | 8 | – | – | 0.875 | 10.631 | 29.042 | 14.402*P+ |
| 10 | 900 | 3.24 | 3.617 | 3.972 | 7.096 | 1.26 | 11.811 | 10 | 5/8-11 | 0.657 | 7.877 | 0.18 | 8 | – | – | 0.875 | 10.631 | 39.699 | 7726.94 |
| 10 | 1500 | 3.24 | 3.617 | 3.775 | 7.49 | 1.457 | 11.811 | 10 | 5/8-11 | 0.669 | 7.877 | 0.118 | 8 | – | – | 0.875 | 10.631 | 61.086 | |
| 12 | 600 | 3.994 | 4.426 | 4.244 | 8.5 | 1.319 | 12 | 5/8-11 | 0.657 | 7.877 | 0.118 | 8 | – | – | 1 | 20.315 | 34.639 | 16.6*P+ | |
| 12 | 900 | 3.994 | 4.426 | 4.21 | 9.051 | 1.813 | 13.78 | 1.732 | 3/4-10 | 0.787 | 9.057 | 0.199 | 8 | – | – | 1 | 20.315 | 46.923 | 10071.3 |
| 12 | 1500 | 3.99 | 4.426 | 4.21 | 9.445 | 1.813 | 13.78 | 32 | 3/4-10 | 0.787 | 9.057 | 0.199 | 8 | – | – | 1 | 20.315 | 71.574 | |
| 14 | 150 | 3.24 | 3.613 | 3.603 | 8.071 | 1.299 | 11.811 | 10 | 5/8-11 | 0.657 | 7.875 | 0.118 | 8 | – | – | 0.875 | 7444 | 25 | 28.32*P+ |
| 14 | 300 | 3.24 | 3.613 | 3.603 | 8.071 | 1.299 | 11.811 | 10 | 5/8-11 | 0.657 | 7.875 | 0.1118 | 8 | – | – | 0.875 | 7444 | 37.886 | 16929.17 |
| 14 | 600 | 3.24 | 3.613 | 3.603 | 8.071 | 1.299 | 13.78 | 3/4-10 | 0.787 | 9.057 | 0.1118 | 8 | – | – | 0.875 | 10.631 | 58.843 | ||
| 14 | 900 | 3.24 | 3.613 | 3.287 | 7.874 | 1.457 | 13.78 | 3/4-10 | 0.827 | 9.057 | 0.1118 | 8 | – | – | 0.875 | 10.631 | 79 | ||
| 16 | 150 | 3.24 | 3.613 | 3.838 | 8.228 | 1.299 | 11.811 | 10 | 5/8-11 | 0.657 | 7.875 | 0.118 | 8 | – | – | 0.875 | 10.631 | 33.602 | 37.48*P+ |
| 16 | 300 | 3.24 | 3.613 | 3.838 | 8.228 | 1.299 | 11.811 | 10 | 5/8-11 | 0.657 | 7.875 | 0.118 | 8 | – | – | 0.875 | 10.631 | 50.655 | 22919.73 |
| 16 | 600 | 4.33 | 4.749 | 4.114 | 8.898 | 1.299 | 13.228 | 3/4-10 | 0.787 | 9.057 | 0.118 | 8 | – | – | 1 | 26.103 | 78.39 | ||
| 16 | 900 | 4.33 | 4.749 | 4.568 | 8.543 | 1 | 13.78 | 11.732 | 3/4-10 | 0.787 | 9.057 | 0.118 | 8 | – | – | 1 | 26.103 | 106.125 | |
| 16 | 1500 | Consult Factory | |||||||||||||||||
| 18 | 150 | 4.33 | 749 | 3.996 | 9.055 | 1.299 | 13.228 | 11.732 | 3/4-10 | 0.787 | 9.057 | 0.118 | 8 | – | – | 1 | 26.103 | 45.663 | 62.74*P+ |
| 18 | 300 | 4.333 | 4.749 | 3.996 | 9.055 | 1.299 | 13.228 | 11.732 | 3/4-10 | 0.787 | 9.057 | 0.118 | 8 | – | – | 1 | 26.103 | 74.21 | 27781.92 |
| 18 | 600 | 4.333 | 4.749 | 3.996 | 9.055 | 1.299 | 13.78 | 11.732 | 3/4-10 | 0.787 | 9.057 | 0.118 | 8 | – | – | 1 | 26.103 | 120.637 | |
| 18 | 900 | 4.742 | 5.284 | 3.267 | 11.807 | 1 | 18.701 | 15.984 | 1-1/2-8 | 0.575 | 11.819 | 0.315 | 8 | – | – | 1.25 | 60.984 | 167.065 | 91.86*P+ |
| 20 | 150 | 4.333 | 4.749 | 4.528 | 9.248 | 1 | 13.386 | 11.732 | 3/4-10 | 0.787 | 9.057 | 0.118 | 8 | – | – | 1 | 26.103 | 57608 | 31428.12 |
| 20 | 300 | 4.323 | 4.749 | 4.449 | 9.248 | 1.417 | 13.78 | 11.732 | 3/4-10 | 0.787 | 9057 | 0.118 | 8 | – | – | 1 | 26.103 | 99.405 | |
| 20 | 600 | 4.333 | 4.749 | 4.382 | 9.839 | 1 | 13.78 | 11.732 | 3/4-10 | 0.787 | 9.057 | 0.118 | 8 | – | – | 1 | 26.103 | 167.381 | |
| 20 | 900 | 4.742 | 5.284 | 5.118 | 11.807 | 1 | 18.701 | 15.984 | 1-1/2-8 | 1.575 | 11.819 | 0.315 | 8 | – | – | 1.25 | 60.984 | 235.357 | 141.23*P+ |
| 24 | 150 | 4.333 | 4.749 | 4.429 | 9.248 | 1.417 | 13.78 | 11.732 | 3/4-10 | 0.787 | 9.057 | 0.118 | 8 | – | – | 1 | 26.103 | 110.228 | 69976.95 |
| 24 | 300 | 4.333 | 4.749 | 4.429 | 9.248 | 1.417 | 13.78 | 11.732 | 3/4-10 | 0.787 | 9.057 | 0.118 | 8 | – | – | 1 | 26.103 | 174.487 | |
| 24 | 600 | 4.725 | 5.257 | 4.331 | 11.02 | 2.362 | 18.701 | 15.984 | 1-1/2-8 | 1.575 | 11.819 | 0.394 | 8 | – | – | 1.25 | 33.1 | 278.997 | |
| 24 | 900 | 5.741 | 6.391 | 6.259 | 12.386 | 1.181 | 18.701 | 15.984 | 1-1/2-8 | 0.575 | 11.817 | 0.118 | 8 | – | – | 1.5 | 108.306 | 383.508 | |
| 30 | 600 | Consult Factory | |||||||||||||||||
| 36 | 600 | Consult Factory | |||||||||||||||||
| * Stem with Double ‘D’ Flat Style | Note: (1) Torque at maximum differential pressure are tabulated (2) Torques expressions are suggested for other differential pressure (3) Differential pressure “P” in torque expressions in PSI | Pressure ratings are according to API 6D/ASME 16.34 Class 150 P = 285 Class 900 P=2220 Class 300 P = 740 Class 1500 P=3705 Class 600 P = 1480 | |||||||||||||||||
Three Piece Trunnion Ball Valve Engineering Data
| Flow Coeffectient (CV) | |||||
| SIZE (in.) | 285 psi | 740 psi | 1480 psi | 2220 psi | 3705 psi |
| 2 | – | – | 350 | 320 | 330 |
| 3×2 | – | – | 190 | 185 | 187 |
| 3 | – | – | 1000 | 910 | 830 |
| 4×3 | – | – | 560 | 505 | 510 |
| 4 | – | – | 1850 | 1760 | 1660 |
| 6×4 | – | – | 800 | 730 | 742 |
| 6 | – | – | 4400 | 4300 | 4167 |
| 8×6 | – | – | 2150 | 2010 | 2033 |
| 8 | – | – | 8450 | 8400 | 8013 |
| 10×8 | – | – | 4500 | 4160 | 4051 |
| 10 | – | – | 14.25 | 14.16 | 13.909 |
| 12×10 | – | – | 8000 | 7300 | 7117 |
| 12 | – | – | 22.79 | 21.23 | 17.073 |
| 14×12 | – | – | 13.99 | – | – |
| 16×12 | – | – | – | – | – |
| 14 | 32,600 | 30,990 | 28.6 | 26 | 24.276 |
| 16×14 | 14,780 | 14,750 | 14.72 | 14.69 | 14.247 |
| 16 | 44,700 | 42,600 | 39.25 | 36.6 | 33.215 |
| 20×16 | 14,870 | 14,860 | 14.85 | 14.83 | 14.795 |
| 18 | 87,825 | 56,225 | 57.41 | 48.665 | 43.402 |
| 20 | 74,775 | 71,800 | 65.463 | 62.239 | 55.931 |
| 24×20 | 26,768 | 26,755 | 25.698 | 26.659 | – |
| 22 | 91,789 | 88,537 | 81.305 | – | – |
| 24 | 113,284 | 109,414 | 98.963 | 93.993 | 83.926 |
| Note: Consult factory for sized not shown. | |||||
Method of Calculating Flow
The Flow Coefficient, or “Cv,” represents the flow rate of water (in gallons per minute) through a fully opened valve with a pressure drop of 1 psi across it. To calculate the flow of liquid through the valve based on the Cv value, the following formulas can be used:
Body & Trim Materials
| Part | Material |
| Body/Adapter | A105, LF2, F316SS |
| Ball/Stem | F316SS or CS+5 mil ENP |
| Seat | Teflon,PEEK |
Pressure Rating (PSIG)
| Material | ANSI Cl.150 | ANSI Cl.300 | ANSI CI.600 | ANSI CI.900 | ANSI Cl.1500 |
| A105,LF2 | 285 | 740 | 1480 | 2220 | 3705 |
| F316 | 275 | 720 | 1440 | 2160 | 3600 |
Low Temperature Limits
| Body Material | °F | ° C | Seat Material | °F | ° C |
| A105 | -20 | -29 | PEEK | -50 | -46 |
| LF2 | -50 | -46 | Teflon | -50 | -46 |
| F316 | -50 | -46 | |||
| Seat Material | °F | ° C | |||
| Viton | -20 | -29 | |||
| NBR | -40 | -40 |
Pressure Temperature Chart (Carbon Steel)
SERIES M3 –Trunnion Mounted Ball Valves
The large trunnion design maintains central positioning, even under high working pressures. Independent floating, spring-loaded seats create a tight seal, even at low differential pressures. The bolted body design simplifies service and maintenance, incorporating double O-rings or a combination of O-rings and gaskets. This design is suitable for both buried and above-ground installations.
Features
- Three-piece body design
- Double block and bleed
- Self relieving seat
- Double piston seat
- Trunnion supported design reduces operating torque
- Antistatic device for grounding of the ball, stem and body
- O-rings plus fire safe stem packing prevent leakage
- Corrosion resistant low friction bearings
- Inconel® seat springs provide upstream and downstream sealing
- Stainless steel sealant injection fittings for emergency stem or seal sealing
- Direct mount top works pad for actuator or gear operator
- 6″ & larger valves are equipped with lifting lugs
- Locking device (lock not included)
- Anti-blowout trunnion stem design
Design Feature
1. Anti-Blowout Stem Design
Stem seal integrity is maintained through the use of three O-rings (or two O-rings and a graphite gasket). The upper O-ring (or graphite gasket) can be replaced while the valve is in line and under pressure.
2. Lubricant / Emergency Seat Seal
Special sealants can be injected through fittings located on the adapter flanges to restore sealing integrity if the seat sealing surface is damaged. A second internal check valve provides backup for the fitting.
3. Emergency Sealant Injection System
The sealant injection system on the bonnet can be used in emergencies, such as O-ring damage or stem leakage.
4. Double Sealed Envelope Connections
Double O-rings or a combination of an O-ring and fire-safe gasket on the body/adapter connections provide positive sealing. This feature makes the P3/M3 suitable for both above-ground and below-ground service.
5. Heavy Duty Bearings
- 6″ – 12″ Class 900, 1500 & 2500
- 14″ – 24″ Class 150, 300 & 600
Trunnions are supported by heavy-duty Teflon®-coated steel bearings. The thrust load on the ball is supported by large trunnions mounted within captured trunnion blocks, resulting in low operating torque and reduced seat wear.
6. Antistatic Device
A spring between the trunnion and the ball or between the stem and the gland plate provides electrical continuity between all valve components.
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Specs of Trunnion Ball Valves
Inconel® Seat Springs
Inconel® seat springs provide effective sealing for both upstream and downstream applications. Similarly, they offer exceptional durability and performance under high pressure. This establishes a reliable seal in demanding conditions. These springs are designed to withstand harsh environments and maintain their integrity over time.
Sealant Injection Fittings
Stainless steel sealant injection fittings are included for emergency stem or seal sealing. They allow for quick and efficient maintenance, significantly reducing downtime. At NTVAL, this feature guarantees that the valve can be quickly repaired in case of leakage. It enhances the overall reliability and serviceability of the valve.
Topworks Pad
The direct mount topworks pad is designed for actuator or gear operator installation. This makes the valve adaptable to various automation needs. It provides flexibility for different operational requirements. The topworks pad enhances seamless integration with automated systems, enhancing control and efficiency.
Features of Trunnion Ball Valves
Anti-Blowout Stem Design
Guarantees stem seal integrity with three o-rings or two o-rings and a graphite gasket. As a matter of fact, the upper o-ring or graphite gasket can be replaced while the valve remains in line and under pressure. This feature maintains system integrity and reduces downtime. It enhances the valve’s overall safety and reliability.
Lubricant / Emergency Seat Seal
Allows special sealants to be injected through fittings on the adapter flanges to restore sealing integrity if the seat sealing surface is damaged. This capability guarantees that the valve can continue to operate even if the primary sealing surface is compromised. It provides a quick and effective solution to maintain valve performance. This feature is particularly useful in critical applications where downtime is costly.
Emergency Sealant Injection System
Located on the bonnet, it can be used in emergencies, for o-ring damage, or if stem leakage occurs. At NTVAL, this system provides an additional layer of security and maintenance capability. It makes sure that the valve remains operational even in unexpected situations. The sealant injection system enhances the overall reliability of the valve.
Benefits of Trunnion Ball Valves
Enhanced Safety
The anti-blowout stem design prevents stem ejection under pressure, establishing operational safety. For instance, the ability to replace the upper o-ring or graphite gasket without shutting down the system adds an extra layer of reliability. This design feature protects against potential hazards, and ensures continuous and safe valve operation.
Maintenance Efficiency
The lubricant/emergency seat seal feature allows for quick restoration of sealing integrity, minimizing downtime. The backup check valve guarantees continued operation even if the primary sealing surface is compromised. This feature reduces maintenance time and costs, making sure that the valve remains functional in critical conditions.
Operational Reliability
The emergency sealant injection system ensures that any issues with o-rings or stem leakage can be swiftly addressed. This feature enhances the valve's reliability, making it suitable for critical applications. It provides a dependable solution for maintaining valve integrity and guarantees consistent performance under demanding conditions.
Applications of Trunnion Ball Valves
Petrochemical Industry
Trunnion Ball Valves are essential in the petrochemical industry for managing the flow of various chemicals and gases. The valves’ ability to maintain tight shut-off guarantees safety and efficiency in processing operations. Additionally, their ease of maintenance reduces downtime, which is crucial in continuous production environments.
Chemical Processing
In chemical processing plants, Trunnion Ball Valves are employed to regulate the flow of corrosive and hazardous chemicals. Their reliable shut-off capabilities and corrosion-resistant materials make them a dependable choice for managing the complex and dangerous operations in this industry.
Steam and Boiling Systems
Trunnion Ball Valves are widely used in steam and boiling systems due to their high-temperature resistance and reliable performance. They provide precise control over steam flow, which is vital for maintaining system efficiency and safety. Moreover, their strong design establishes long service life, reducing the need for frequent replacements and maintenance.
Pulp, Mining, Water & Sewage
In the pulp and mining industries, as well as water and sewage systems, Trunnion Ball Valves play a critical role in controlling fluid flow. These valves can handle abrasive and slurry-like substances commonly found in these applications. NTVAL recognizes that their durability and ability to withstand high pressures make them suitable for challenging environments.
4 Considerations When Buying a Trunnion Ball Valve
01
Pressure Rating of 150 to 2500 PSI
Trunnion Ball Valves are designed to handle high-pressure applications, with typical pressure ratings ranging from 150 PSI to 2500 PSI. It’s essential to choose a valve that can withstand the maximum operating pressure of your system to guarantee safety and performance. NTVAL suggests always verifying the valve’s pressure rating against your application requirements to avoid potential failures.
02
Material Compatibility of 29°C to 200°C
Common materials include stainless steel, carbon steel, and Inconel®, each suited for different environments and media. For example, stainless steel valves are ideal for corrosive environments, while carbon steel valves are better for non-corrosive applications. Make sure the valve material matches the chemical properties and temperature ranges (e.g., -29°C to 200°C for stainless steel) of your specific application.
03
Double O-rings Sealing
Look for valves with double-sealed envelope connections, which typically use double o-rings or a combination of an o-ring and a fire-safe gasket. These seals ensure positive sealing and make the valve suitable for both above-ground and below-ground installations. Additionally, check if the valve includes emergency sealant injection systems and double-sealed envelope connections for enhanced reliability.
04
2 to 48 Inches Size Actuation
Consider the size and actuation method of the Trunnion Ball Valve. Sizes typically range from 2 inches to 48 inches in diameter, and the appropriate size should match your pipeline dimensions. Actuation methods include manual, pneumatic, and electric actuators. For large or high-pressure systems, electric or pneumatic actuators provide better control and ease of operation.
FAQs About Trunnion Valves
Our standard quality guarantee period for trunnion valves is 18 months from the date of delivery.
We guarantee compliance with environmental and safety regulations by obtaining ISO14001 and ISO45001 certifications for our trunnion valves.
Yes, each trunnion valve is delivered with a 3.1 certificate at no extra cost. The certificate will be sent for your approval before delivery.
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