18061659285
Class 900 Fully Welded Trunnion-Mounted DBB Gas Ball Valve with Gear Operator
Product Parameters
| Size | 2" to 56" (DN50–DN1400) |
| Pressure | Class 900 (Optional Class 150/300/600/1500) |
| Operating Temp | -29℃ to 180℃ (Material Dependent) |
| Ball Type | Trunnion-mounted, fully welded one-piece body |
| Sealing | Double Block-and-Bleed (DBB) with optional emergency sealant injection |
| End Connection | Butt Weld / Socket Weld (pipe extension optional) |
| Operation | Gear-operated (manual), optional electric or pneumatic |
| Stem | Short stem (optional extended) |
| Mounting | ISO 5211 direct mounting |
| Body Materials | Carbon Steel, Low Temp Steel, Stainless Steel, Duplex/Alloy Steel |
| Seat Materials | PEEK, PCTFE, Devlon V-API, Hard-seated options |
| Standards | API 6D, ASME B16.34, BS 5351, MESC SPET 7/200 |
| Applications | Gas Transmission, Oil & Gas, Municipal Gas Distribution, Offshore Oil & Gas, Industrial Gas Applications |
| Brand | SLVCN |
Key Features
Double Block-and-Bleed (DBB) Configuration
Provides secure pipeline isolation and safe cavity pressure relief, preventing leaks and ensuring safe operation in gas transmission systems.
Trunnion-Mounted Ball Design
Maintains stable sealing under high-pressure and large-diameter conditions, extending valve life and reducing wear in gas pipelines.
Gear-Operated Mechanism
Low-torque, smooth manual operation for precise control, even under full pressure, ensuring ease of use in critical gas applications.
Safety Features for Critical Gas Applications
Includes fire-safe seats, anti-static protection, and anti-blowout stem, providing enhanced safety in high-pressure, flammable gas environments.
Versatile Material Options
Customizable materials, including Carbon Steel, Stainless Steel, Alloy Steel, and PCTFE, ensure compatibility with various gas media, temperatures, and project requirements.
Product Details
The SLVCN Class 900 Fully Welded Trunnion-Mounted DBB Gas Ball Valve is built for high-performance, leak-free flow control in critical gas transmission pipelines. Its fully welded one-piece body ensures zero external leakage, ideal for underground, subsea, and high-pressure environments. The Double Block-and-Bleed (DBB) design ensures secure isolation and safe cavity pressure relief, protecting system integrity.
The trunnion-mounted ball offers stable sealing under high pressure and large diameters. The gear-operated design provides low-torque, smooth manual operation, while the short-stem design suits above-ground installations, with optional extended stems for buried service.
Customizable materials, including Carbon Steel, Stainless Steel, Alloy Steel, PEEK, and PCTFE, meet various pressure, temperature, and media requirements. Ideal for oil & gas, gas transmission, and offshore pipelines, this valve provides reliable performance, safety, and low maintenance.
| 1 | Welding steel pipe | 10 | Seat | 19 | Seal Ring | 28 | Nut | 37 | Four Open Loop |
| 2 | Seamless steel tube | 11 | Seat | 20 | Extension Stem | 29 | Bolt | 38 | Sealing Ring |
| 3 | Right Body | 12 | Ball | 21 | Bearing | 30 | Packing | 39 | Thrust Washer |
| 4 | Spring | 13 | Trunnion Support | 22 | Extension Support | 31 | Thrust Washer | 40 | Stem Bearing |
| 5 | "O"-Ring | 14 | Worm-Gear | 23 | Pin | 32 | "O"-Ring | 41 | Stem |
| 6 | "O"-Ring | 15 | Key | 24 | Support Frame | 33 | Packing Box | 42 | Stem Bearing |
| 7 | Thrust Washer | 16 | Bolt | 25 | Key | 34 | Gasket | 43 | Body |
| 8 | Packing | 17 | "O"-Ring | 26 | Connection Plate | 35 | "O"-Ring | 44 | Thrust Bearing |
| 9 | Seat Retainer | 18 | "O"-Ring | 27 | Stud | 36 | Stem Bearing | 45 | Stem Bearing |
Parts List
Dimensions: Class 900 - Full Port
| Size | Bore | Face to Face | D in/mm | D1 in/mm | Weight | |||
| NPS/DN | B1 in/mm | B2 in/mm | RF in/mm | RT J in/mm | BWE in/mm | Model FW lb/kg | ||
| 2" | 1.94 | 1.94 | 14.5 | 14.63 | 14.5 | 8.5 | 8.5 | 137 |
| 50 | 49 | 49 | 368 | 371 | 368 | 216 | 216 | 62 |
| 3" | 2.94 | 2.94 | 15 | 15.13 | 15 | 9.5 | 9.5 | 205 |
| 80 | 74 | 74 | 381 | 384 | 381 | 241 | 241 | 93 |
| 4" | 3.94 | 3.94 | 18 | 18.13 | 18 | 11.5 | 11.5 | 337 |
| 100 | 100 | 100 | 457 | 460 | 457 | 291 | 291 | 153 |
| 6" | 5.94 | 5.94 | 24 | 24.13 | 24 | 15 | 15 | 750 |
| 150 | 150 | 150 | 610 | 613 | 610 | 381 | 381 | 340 |
| 8" | 7.94 | 7.94 | 29 | 29.13 | 29 | 18.9 | 18.5 | 1433 |
Weight and dimensions for larger valve sizes up to 56" available on request
Dimensions: Class 900 - Reduced Port
| Size | Bore | Face to Face | D in/mm | D1 in/mm | Weight | |||
| NPS/DN | B1 in/mm | B2 in/mm | RF in/mm | RTJ in/mm | BWE in/mm | Model GW lb/kg | ||
| 2"×11/2" | 1.93 | 1.5 | 14.5 | 14.63 | 14.5 | 8.5 | 8.5 | 108 |
| 50×40 | 49 | 38 | 368 | 371 | 368 | 216 | 216 | 49 |
| 3"X2" | 2.94 | 1.94 | 15 | 15.13 | 15 | 9.5 | 9.5 | 150 |
| 80×50 | 74 | 49 | 381 | 384 | 381 | 241 | 241 | 68 |
| 4"X3" | 3.94 | 2.94 | 18 | 18.13 | 18 | 11.5 | 11.5 | 254 |
| 100×80 | 100 | 74 | 457 | 460 | 457 | 291 | 291 | 115 |
| 6"×4" | 5.94 | 3.94 | 24 | 24.13 | 24 | 15 | 15 | 481 |
| 150×100 | 150 | 100 | 610 | 613 | 610 | 381 | 381 | 218 |
| 8"×6" | 7.94 | 5.94 | 29 | 29.13 | 29 | 18.5 | 18.5 | 948 |
| 200×150 | 201 | 150 | 737 | 740 | 737 | 471 | 471 | 430 |
| 10"×8" | 9.94 | 7.94 | 33 | 33.13 | 33 | 21.5 | 21.5 | 1654 |
Weight and dimensions for larger valve sizes up to 56" available on request
If you want to obtain the complete size, please contact us
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