8″-150LB 2-Piece Trunnion Mounted Ball Valve
Description
8″-150LB 2-Piece Trunnion Mounted Ball Valve Technical Data Sheet
Product Name: 2-Piece Trunnion Mounted Ball Valve
Size: 8 inch (DN200)
Pressure Class: Class 150LB
Connection: Flanged Ends (Raised Face)
Body Material: ASTM A216 Grade WCB (Carbon Steel)
Trim Material: Stainless Steel 316 (Trim 8)
1. Product Overview
This valve features a 2-piece bolted body construction with a trunnion-mounted ball design. The ball is supported by upper and lower stems (trunnions), which reduces operating torque, accommodates high line loads, and ensures reliable sealing performance. It is suitable for oil, gas, petrochemical, and long-distance pipeline applications as an isolation valve.
2. Basic Technical Specifications
| Item | Parameter |
|---|---|
| Valve Type | 2-Piece Trunnion Mounted Ball Valve |
| Nominal Size | 8 inch (DN200) |
| Pressure Rating | Class 150LB |
| End Connections | Flanged, Raised Face (RF) |
| Flange Standard | ASME B16.5 |
| Face-to-Face Dimension | ASME B16.10 (Standard pattern) |
| Design Standard | API 6D / ISO 14313 |
| Test Standard | API 598 |
| Operation | Gearbox (standard) / Lever (optional) |
| Applicable Media | Water, Oil, Gas |
| Temperature Range | -29°C ~ +200°C (-20°F ~ 400°F) (Seal dependent) |
3. Design Features
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2-Piece Body Construction: Bolted body design allows for easy maintenance and access to internal components.
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Trunnion Mounted Ball: The ball is fixed and supported by upper and lower trunnions (stems), reducing operating torque and ensuring stable operation under high differential pressure.
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Bidirectional Sealing: The valve is designed to seal pressure from either direction.
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Double Block and Bleed (DBB): Provides double isolation and bleed capability as per API 6D.
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Anti-Blowout Stem: The stem is internally inserted and retained by a shoulder, preventing stem ejection under pressure.
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Automatic Cavity Pressure Relief: Excess pressure trapped in the body cavity can be automatically relieved to the upstream or downstream side to protect the pipeline.
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Antistatic Device: Springs ensure electrical continuity between the ball, stem, and body to dissipate static charges.
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Fire Safe Design: Optional design meets API 607 / API 6FA standards.
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Seat Design: Spring-loaded seats ensure constant contact with the ball for bubble-tight sealing at low and high pressures.
4. Materials of Construction
| Part Name | Material | Material Standard |
|---|---|---|
| Body (Left) / Shell | Carbon Steel | ASTM A216 WCB |
| Body (Right) / End Cap | Carbon Steel | ASTM A216 WCB |
| Ball | Stainless Steel 316 | ASTM A351 CF8M |
| Stem | Stainless Steel 316 | ASTM A479 316 |
| Seat Support Ring | Stainless Steel 316 | ASTM A479 316 |
| Seat Insert / Seal Ring | Reinforced PTFE (RPTFE) | – |
| Seat Spring | Stainless Steel 316 | – |
| Body Gasket | Spiral Wound (316SS + Graphite) | – |
| Trunnion Bearings / Bushings | Self-lubricating Composite / PTFE | – |
| Stem Packing | Flexible Graphite / PTFE V-Rings | – |
| Gland / Packing Flange | Carbon Steel / Stainless Steel | – |
| Bolting (Studs) | Alloy Steel | ASTM A193 B7 |
| Bolting (Nuts) | Carbon Steel | ASTM A194 2H |
Note: “316 Trim” typically means the ball, stem, and all metal components in contact with the media are made of 316 Stainless Steel.
5. Pressure-Temperature Ratings (ASME B16.34)
| Temperature (°C) | Temperature (°F) | Working Pressure (psig) | Working Pressure (barg) |
|---|---|---|---|
| -29 to 38 | -20 to 100 | 285 | 19.7 |
| 93 | 200 | 260 | 17.9 |
| 149 | 300 | 230 | 15.9 |
| 204 | 400 | 200 | 13.8 |
| 260 | 500 | 170 | 11.7 |
Note: For RPTFE seats, the maximum continuous operating temperature is typically 200°C (400°F).
6. Dimensional Data (Reference)
| Dimension | Value | Unit |
|---|---|---|
| Nominal Size | 8 (DN200) | inch (mm) |
| Pressure Class | 150LB | – |
| Face-to-Face Length (L) | 457 | mm |
| Flange Outside Diameter (D) | 343 | mm |
| Bolt Circle Diameter (K) | 298.5 | mm |
| Bolt Hole Diameter (L) | 25 | mm |
| Number of Bolt Holes | 8 | pcs |
| Flange Thickness (T) | 28 | mm |
| Height (H) Open | ~620 | mm |
| Center to Top Height (H1) | ~290 | mm |
| Gearbox Handwheel Diameter | 350 | mm |
| Approximate Weight | ~170 | kg |
7. Test Requirements (API 598)
| Test Item | Medium | Test Pressure | Duration |
|---|---|---|---|
| Shell Hydrostatic Test | Water | 450 psig (3.1 MPa) | Per API 598 |
| High Pressure Seat Test | Water | 315 psig (2.17 MPa) | Per API 598 |
| Low Pressure Pneumatic Test | Air or Nitrogen | 80 psig (0.6 MPa) | Per API 598 |
8. Options & Accessories
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Gearbox with handwheel and position indicator (standard for 8″ size)
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Locking device
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Limit switches / Positioners
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Electric or pneumatic actuators
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Extended stem for buried service
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NACE MR0175 / MR0103 compliance (for sour service)
9. Ordering Information
To ensure correct valve selection, please provide the following when ordering:
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Valve Type: 2-Piece Trunnion Ball Valve, 8″ 150LB.
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Material Requirements: WCB Body, 316 Trim.
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Seat Material: RPTFE (default) or other special requirements.
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Operation: If an electric or pneumatic actuator is required, please provide power supply / air supply specifications.
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Special Requirements: Fire-safe certification, anti-static, API 6D, etc.
Note: This technical data sheet is prepared based on general industry standards. For certified dimensions and specific application suitability, always consult the manufacturer.
