4″*3″-1500LB SS Trunnion Ball Valve
Description
TECHNICAL DATA SHEET
Product Name: 4″ x 3″ 1500LB Stainless Steel Trunnion Mounted Ball Valve
Model/Specification: 4×3″-1500LB-SS-TRUNNION
Valve Type: Trunnion Ball Valve (Reduced Bore)
Connection Type: Flanged (RF / RTJ) / Butt Weld (BW) User specified
1. Basic Design Parameters
| Parameter | Standard/Specification |
|---|---|
| Valve Size | 4 inches x 3 inches (DN100 x DN80) – Reduced Bore |
| Pressure Class | Class 1500 LB (PN250 / 3700 PSI) |
| Body Material | Stainless Steel (ASTM A182 F304 / F316 / F316L) |
| Ball Material | Stainless Steel (ASTM A182 F304 / F316) |
| Stem Material | Stainless Steel (ASTM A182 F316 / 17-4PH) |
| Manufacturing Process | Forged Steel / Cast Steel (depending on manufacturer) |
| Design Standard | API 6D / ASME B16.34 |
| End Connection Standard | ASME B16.5 (Flanged RF/RTJ) / ASME B16.25 (BW) |
| Face to Face Standard | ASME B16.10 |
| Test & Inspection Std. | API 598 / API 6D |
| Fire-Safe Design | API 607 / API 6FA (Optional) |
| Fugitive Emission | ISO 15848-1 (Optional) |
2. Technical Specifications
| Parameter | Details |
|---|---|
| Valve Type | Trunnion Mounted Ball Valve, Side Entry / Top Entry (Optional) |
| Body Type | Two-Piece / Three-Piece Bolted Body |
| Bore Type | Reduced Bore (4″x3″) |
| Seat Type | Double Piston Effect (DPE) / Single Piston Effect (SPE) options available |
| Ball Support | Trunnion-mounted (fixed ball) with double stem bearings |
| Sealing Principle | Double Block and Bleed (DBB) – Valve isolates pressure from both ends and allows cavity bleed |
| Applicable Media | Oil, Natural Gas, Water, Steam, Corrosive Fluids, Hydrocarbons |
| Temperature Range | -46°C to +200°C (Soft Seats) / -29°C to +427°C (Metal Seats) |
| Operation | Worm Gear (Standard) / Lever / Pneumatic Actuator / Electric Actuator |
| Anti-Static Device | API 6D Requirement (Standard) – Spring-loaded ball between ball and stem |
| Blow-Out Proof Stem | Standard |
| Cavity Pressure Relief | Self-relieving seat design (automatic pressure relief in ball cavity) |
| Emergency Sealant Injection | Standard (Sealant injection fittings on body and seat) |
3. Material of Construction (Recommended – Stainless Steel)
| Part Name | Material | Standard/Grade |
|---|---|---|
| Body | Stainless Steel | ASTM A182 F304 / F316 (Forged) or A351 CF8/CF8M (Cast) |
| Bonnet / Body Ends | Stainless Steel | ASTM A182 F304 / F316 |
| Ball | Stainless Steel (Hardened) | ASTM A182 F304 / F316 (Chrome plated optional for wear resistance) |
| Stem | Stainless Steel / 17-4PH | ASTM A182 F316 / 17-4PH (High strength) |
| Trunnion | Stainless Steel | ASTM A182 F304 / F316 |
| Seat Rings | Stainless Steel with Soft Insert | A182 F304/F316 + RPTFE / DEVLON® / PEEK |
| Seat Support / Carrier | Stainless Steel | ASTM A182 F304 / F316 |
| Body Gasket | Spiral Wound | Stainless Steel + Graphite / PTFE |
| Stem Seals / Packing | RPTFE / Graphite | Low emission, fire-safe grade |
| Thrust Bearings | PTFE + Stainless Steel | Self-lubricating |
| Anti-Static Device | Stainless Steel Ball + Spring | 316 SS |
| Body Bolts/Nuts | Alloy Steel / Stainless Steel | ASTM A193 B7 / B8 + A194 2H / 8 |
| Gear Operator | Carbon Steel Housing | With position indicator, ISO 5211 mounting pad |
4. Main Dimensions & Connection Details
Note: Dimensions are for 4″x3″ Reduced Bore Trunnion Ball Valve with Flanged Ends (RF). BW end length may vary by manufacturer.
4.1 End-to-End Dimensions (Face-to-Face)
| Size | Pressure Class | L (RF) mm | L (RF) in | L (RTJ) mm | L (RTJ) in |
|---|---|---|---|---|---|
| 4″ x 3″ | 1500LB | 432 | 17.0 | 432 | 17.0 |
4.2 Flange Details (Per ASME B16.5 – Class 1500)
| Parameter | 4″ Main Flanges |
|---|---|
| Flange Diameter (OD) | 235 mm (9.25 in) |
| Bolt Circle Diameter (PCD) | 190.5 mm (7.5 in) |
| Number of Bolt Holes | 8 |
| Bolt Hole Diameter | 32 mm (1.25 in) |
| Bolt Thread Size | 1 1/8″ – 8 UN |
| Raised Face Height | 7 mm (0.28 in) |
| Hub Diameter | 171.4 mm (6.75 in) |
| Flange Thickness (Min.) | 46 mm (1.81 in) |
4.3 Bore Details (Reduced Bore)
| Parameter | Value |
|---|---|
| Port Diameter (Reduced Bore) | ~76 mm (3.0 in) (Matches 3″ pipe ID) |
| Flow Area Reduction | Reduced bore for pressure drop management and cost efficiency |
5. Pressure-Temperature Rating (ASME B16.34 / Class 1500)
*Material Group: Stainless Steel (A182 F304/F316) with Soft Seats (RPTFE/PEEK)*
| Temperature (°C) | Working Pressure (bar) | Working Pressure (psi) | Notes |
|---|---|---|---|
| -29 to 38 | 250 | 3625 | Maximum Rating (Class 1500) |
| 100 | 235 | 3400 | |
| 150 | 220 | 3190 | Max for standard RPTFE seats |
| 200 | 205 | 2970 | With PEEK seats |
| 250 | 190 | 2755 | With PEEK seats |
| 300 | 175 | 2538 | With PEEK seats |
| 400 | 150 | 2175 | With Metal Seats |
Note: Metal seated versions available for higher temperatures up to 427°C .
6. Flow Characteristics (4″x3″ Reduced Bore)
| Parameter | Value |
|---|---|
| Flow Coefficient Cv (US gal/min) | ~500 – 600 (typical for 4″x3″ reduced bore) |
| Flow Coefficient Kv (m³/h) | ~430 – 520 |
| Shut-off Class | API 598 / API 6D (Zero Leakage – Soft Seat) / Class V or VI (Metal Seat) |
7. Test Pressure (API 598 / API 6D)
| Test Type | Medium | Pressure (bar) | Pressure (psi) | Acceptance Criteria |
|---|---|---|---|---|
| Shell Test (Hydrostatic) | Water | 383 | 5550 | 1.5 x 38°C Rating (no visible leakage) |
| High-Pressure Seat Test | Water | 281 | 4075 | 1.1 x 38°C Rating (Zero leakage – soft seats) |
| Low-Pressure Seat Test | Air / N2 | 5.5 – 7.0 | 80 – 100 | Bubble-tight |
| Double Block & Bleed Test | Water / Air | Per API 6D | Per API 6D | Verify cavity isolation and bleed capability |
8. Features & Applications
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Key Features:
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Trunnion Mounted Design: The ball is supported by upper and lower trunnions (bearings), reducing operating torque and enabling high-pressure, large-size applications .
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Reduced Bore (4″x3″): Optimized flow path for pressure drop management and cost efficiency.
-
Double Block & Bleed (DBB): Provides positive isolation from both upstream and downstream pressure, with the ability to bleed/vent the body cavity .
-
Emergency Sealant Injection: Fittings allow injection of sealant into seats and stem in case of seal damage, providing emergency shut-off capability .
-
Cavity Pressure Relief: Self-relieving seats prevent dangerous over-pressure in the ball cavity due to thermal expansion .
-
Anti-Static Device: Ensures electrical continuity across the valve to prevent spark ignition in flammable services .
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Fire-Safe Design: Optional API 607/6FA certification ensures sealing integrity in case of fire .
-
Blow-out Proof Stem: Stem is retained within the valve body even if the gland is removed under pressure .
-
ISO 5211 Mounting Pad: Standardized mounting for easy actuator installation .
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Bidirectional Sealing: Suitable for flow in either direction.
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Main Applications:
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Oil & Gas Pipelines: Transmission and distribution lines requiring DBB isolation .
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Refineries & Petrochemical Plants: Hydrocarbon processing, high-pressure fluid handling.
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Offshore Platforms: Compact design for space-constrained applications .
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Power Generation: Steam and high-pressure water systems.
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LNG & Cryogenic Plants: With extended bonnet and low-temperature materials.
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Subsea & Pipeline Terminals: Where high integrity isolation is required.
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Disclaimer: The above data is prepared based on common industry standards (API 6D, ASME B16.34) for trunnion ball valves. Specific dimensions, materials, and pressure ratings may vary by manufacturer. The final technical agreement and certified drawings shall prevail.
