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What is a trunnion-mounted ball valve, and how does it differ from other ball valves?
A trunnion-mounted ball valve is a type of industrial valve used to control the flow of various fluids, such as water, gas, and oil, in pipelines and process systems. Unlike floating ball valves, which rely on the pressure of the fluid to maintain the ball's position, trunnion-mounted ball valves have additional mechanical support in the form of trunnions, which are fixed pins or shafts that provide a pivot point for the ball. This design offers increased stability and enhances the valve's sealing capabilities, making it suitable for handling higher pressures and larger pipe sizes. Trunnion-mounted ball valves boast a more robust construction, allowing them to withstand harsher operating conditions, making them a preferred choice for critical applications in industries like oil and gas, petrochemicals, and power generation. These valves provide bidirectional sealing, ensuring reliable and leak-free operation in both flow directions.
What are the primary applications of trunnion-mounted ball valves in various industries?
Trunnion-mounted ball valves find widespread applications across diverse industries due to their robust design and reliable performance. In the oil and gas sector, these valves are commonly used in pipelines to transport and distribute crude oil, natural gas, and refined products. They are also integral components in processing facilities, such as refineries and petrochemical plants, where they control the flow of various fluids in critical processes. In the power generation industry, trunnion-mounted ball valves are crucial in regulating the flow of steam and water in power plants.
They are utilized in water and wastewater treatment plants to effectively manage the movement of fluids in treatment processes. Trunnion-mounted ball valves in the chemical and pharmaceutical industries offer precise control over corrosive and hazardous substances. Their ability to handle high pressures and temperatures makes them well-suited for demanding applications in mining, metallurgy, and other heavy industries. Their versatility and reliability make trunnion-mounted ball valves essential components in numerous industrial operations.
| Basic Design | API 6D |
|---|---|
| Wall Thickness | API 6D |
| Size | 2" - 42" |
| Face-to-Face Dimension | API 6D |
| Flange End Dimension | ANSI/ASME B16.5 (1” to 24”) ANSI/ASME B16.47 (26” & up) |
| Butt-Weld End Dimension | ANSI/ASME B16.25 |
| Inspection & Testing | API 6D |
| Fire Safe Design | API 607/BS 6755 |
| Class | 150 to 2500 |
| Port | Full & Reduced Port (Bolted Body Construction) |
| External Trunnion | 2” - 14” (150 & 300) 2” - 12” (600 & 900) 2” - 4” (1500 & 2500) |
| Internal Trunnion | 16” & up 150 & 300 14” & up 600 & 900 6” & up 1500 & 2500 |
| Application & uses |
Power Plants Process Industries Petrochemical Plants Refineries Fertilizers Plants Distillery Plants Sugar Industries Water, Steam, Gas, Oil & Other Non-aggressive media |
| No. | Component Name | Qty. |
|---|---|---|
| 1 | Body | 1 |
| 2 | Adaptor | 2 |
| 3 | Ball | 1 |
| 4 | Seat | 2 |
| 5 | Seat Ring | 2 |
| 6 | Coil Spring | 32 |
| 7 | Body “O” Ring | 4 |
| 8 | Gasket | 2 |
| 9 | Body Stud | 32 |
| 10 | Body Nut | 32 |
| 11 | Stem Bottom Bush | 1 |
| 12 | Stem | 1 |
| 13 | Anti-Static Device | 2 |
| 14 | Bearing | 1 |
| 15 | Trunnion | 1 |
| 16 | Trunnion O Ring | 1 |
| 17 | Thrust Washer | 1 |
| No. | Component Name | Qty. |
| 18 | Bearing Block | 1 |
| 19 | Bearing Block Bolt | 6 |
| 20 | Gland Packing | 3 |
| 21 | Stem Housing | 1 |
| 22 | Stem Sealant Injector | 1 |
| 23 | Stem Housing Gasket | 1 |
| 24 | Stem Housing Bolt | 4 |
| 25 | Lock Pin | 1 |
| 26 | Gland | 1 |
| 27 | Hex Head Screw | 2 |
| 28 | Gland Nut | 8 |
| 29 | Gland Stud | 4 |
| 30 | Gear Unit | 1 |
| 31 | Hand Wheel Stud | 1 |
| 32 | Hand Wheel | 1 |
| 33 | Hand Wheel Nut | 1 |
| 34 | Foot Support | 2 |
| Size | 2-piece | 3-piece | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | B | C | D | Wt. | A | B | C | D | Wt. | |||||||
| NPS | RF | RTJ | BW | FL | BW | RF | RTJ | BW | FL | BW | ||||||
| 2 | 178 | 191 | 216 | 49 | 60 | 160 | 20 | 16 | – | – | – | – | – | – | – | – |
| 3 | 203 | 216 | 283 | 74 | 90 | 260 | 35 | 30 | – | – | – | – | – | – | – | – |
| 4 | 229 | 241 | 305 | 100 | 105 | 280 | 45 | 40 | – | – | – | – | – | – | – | – |
| 6 | 394 | 406 | 457 | 150 | 160 | 485 | 140 | 120 | – | – | – | – | – | – | – | – |
| 8 | 457 | 470 | 521 | 201 | 215 | 595 | 235 | 205 | 457 | 470 | 521 | 201 | 320 | 600 | 290 | 260 |
| 10 | 533 | 546 | 559 | 252 | 265 | 635 | 340 | 300 | 533 | 546 | 559 | 252 | 390 | 690 | 430 | 390 |
| 12 | 610 | 622 | 635 | 303 | 310 | 720 | 530 | 465 | 610 | 622 | 635 | 303 | 410 | 710 | 620 | 560 |
| 14 | 686 | 699 | 762 | 334 | 340 | 745 | 680 | 595 | 686 | 699 | 762 | 334 | 445 | 760 | 810 | 730 |
| 16 | 762 | 775 | 838 | 385 | 380 | 790 | 870 | 760 | 762 | 775 | 838 | 385 | 490 | 785 | 1040 | 935 |
| 18 | 864 | 876 | 914 | 436 | 430 | 885 | 1280 | 1130 | 864 | 876 | 914 | 436 | 535 | 830 | 1310 | 1180 |
| 20 | 914 | 927 | 991 | 487 | 490 | 940 | 1625 | 1425 | 914 | 927 | 991 | 487 | 590 | 920 | 1860 | 1675 |
| 24 | 1067 | 1080 | 1143 | 589 | 555 | 1010 | 2460 | 2150 | 1067 | 1080 | 1143 | 589 | 655 | 1000 | 3120 | 2817 |
Ball Valves in Distillery Plants
Ball Valves in Sugar Industries
Ball Valve in Process Industries
Ball Valve in Power Plants
Ball Valve in Refineries
Ball Valve in Petrochemical Plants
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Stainless Steel Ball Valve
Because they are constructed of steel and have a high level of corrosion resistance, stainless steel valves are particularly durable. Steel valves can withstand both extremely high and low temperatures. Brass or plastic valves are typically only rated for a narrower range of working temperatures than steel valves.
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Carbon Steel Ball Valve
Carbon steel valves are utilised in hydraulic-based applications because of their great resistance to the corrosive tendencies of water and other liquids. It has excellent mechanical qualities and strengthens and extends the life of the valve mechanism due to its high carbon content.
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Cast Iron Ball Valve
Cast iron valves are frequently employed in a variety of applications, such as utility systems in different industrial plants, air conditioning and plumbing in buildings, fire fighting apparatus, and water and sewer lines.
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Alloy Steel Ball Valve
Alloy Steel Valves that are developed using raw materials that meet or exceed national and international standards. A Three uninterrupted flow of processes from foundry operation is the key characteristic of alloy steel valves.
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