ESD Trunnion-Mounted Ball Valve (Reduced Bore 8 x 6)
Description
TECHNICAL DATA SHEET
ESD Trunnion-Mounted Ball Valve (Reduced Bore 8″ x 6″)
1. Product Overview
This product is an 8″ x 6″ Reduced Bore ESD (Emergency Shut-Down) Trunnion-Mounted Ball Valve, engineered for high-pressure, fail-safe isolation in critical oil, gas, and petrochemical pipelines. The valve features 8-inch (DN200) flanged end connections with an internal reduced bore of 6 inches (DN150).
The trunnion-mounted design absorbs line pressure thrust, ensuring low operating torque and reliable bubble-tight sealing. Equipped with a heavy-duty pneumatic spring-return actuator and a comprehensive control panel, this valve is designed to automatically close (Fail-Close) upon loss of instrument air or an emergency trip signal, providing rapid and reliable overpressure or process safety protection.
2. General Technical Specifications
| Parameter | Specification / Data |
|---|---|
| Product Type | ESD Trunnion-Mounted Ball Valve |
| Nominal Size (End Connection) | 8″ (DN200) |
| Bore Size | 6″ (DN150) |
| Bore Configuration | Reduced Bore (8″ x 6″) |
| Pressure Rating | Class 600 (PN100) |
| Body Configuration | 2-PC Side Entry (Bolted Body) |
| End Connection | 8″ RF (Raised Face) / RTJ (Ring Joint) Flanges |
| Operation | Pneumatic Spring-Return Actuator (Fail-Close / ESD) Includes Manual Handwheel Override |
| Applicable Temperature | -29°C ~ +200°C (Standard) Cryogenic or High-Temp Extended Stem available |
| Applicable Medium | Oil, Natural Gas, Water, Refined Products, Sour Service (H₂S) |
| Fire Safe Design | API 6FA, API 607 Certified |
| Design Standard | API 6D, API 608, ISO 17292 |
3. Material of Main Parts
(Based on the “WCB” marking visible on the body in the provided images)
| Part Name | Material Specification |
|---|---|
| Body / Bonnet | ASTM A216 WCB (Carbon Steel) |
| Alternative Materials | A105, A182 F304/F316/F51, A350 LF2, CF8M, LCB, LCC |
| Ball (Trim) | A182 F304/F316/F51, with Chrome Plating or ENP |
| Stem | A182 F304/F316/F51, 17-4PH |
| Seat / Seals | PTFE, RPTFE, PEEK, Viton (FKM), HNBR, Metal-to-Metal |
| Bolting | A193 B7 / B7M, A194 2H / 2HM (NACE compliant) |
4. Design & Manufacturing Standards
| Item | Standard |
|---|---|
| Design & Manufacture | API 6D, API 608, ISO 17292 |
| Face-to-Face | API 6D, ASME B16.10 (Class 600, Size 8) |
| End Connection | ASME B16.5 (NPS 8, Class 600) |
| Test & Inspection | API 6D, API 598 |
| Fire Safe Design | API 6FA, API 607 |
| Sour Service | NACE MR-0175, NACE MR-0103, ISO 15848 |
5. Key Design Features
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Reduced Bore Advantage: The 8″ x 6″ reduced port configuration optimizes flow characteristics (Cv) for high-pressure drop applications, reduces actuator torque requirements, and provides a cost-effective solution for pipelines transitioning from 8″ to 6″ line sizes.
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Trunnion Mounted Design: The ball is anchored by upper and lower stems, absorbing line pressure thrust and ensuring stable sealing performance under high differential pressure.
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Double Block & Bleed (DBB) / Double Isolation & Bleed (DIB): Allows for verification of seal integrity and safe depressurization of the cavity.
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Emergency Seat and Stem Injection: Secondary sealing ports for injecting sealant in case of primary seal failure, extending valve life.
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Anti-Static Device: Ensures electrical continuity between the ball, stem, and body.
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Anti-Blowout Stem: Prevents accidental ejection of the stem under pressure.
6. Actuation & ESD Accessories (Based on Images)
| Component | Description |
|---|---|
| Actuator | Heavy-duty Pneumatic Spring-Return Actuator (Red cylinder housing) |
| Manual Override | Top-mounted Handwheel for emergency manual operation |
| Control Panel | Stainless Steel tubing with Filter Regulator, Pressure Gauge, and Solenoid Valve |
| Position Indicator | Visual indicator and Limit Switches for remote status feedback (Open/Closed) |
| Lifting Lugs | Integrated lifting eyes on the actuator and body for safe crane handling |
7. Nameplate & Marking (Observed on Product Images)
| Marking | Description |
|---|---|
| 8 | End Connection Size: NPS 8 (DN200) |
| 600 | Pressure Rating: Class 600 |
| WCB | Body Material: ASTM A216 WCB (Carbon Steel) |
| 5256 | Manufacturing Batch / Serial Number |
| Brand | SAVVY |
8. Typical Applications
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Emergency Shut-Down (ESD) Systems: Critical fail-safe isolation in process plants, refineries, and offshore platforms.
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High-Integrity Pressure Protection Systems (HIPPS): Rapid isolation to prevent overpressure scenarios.
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High-Pressure Gas Transmission: Mainline isolation where line size reduces from 8″ to 6″.
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Sour Gas Service: Sour crude and natural gas handling (with NACE compliant materials).
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Storage Terminals: Tank farm isolation and manifold control.
Note to Client:
The provided images confirm an 8″ Class 600 WCB body with a pneumatic spring-return actuator and manual override. The 8″ x 6″ reduced bore configuration is ideal for high-pressure ESD loops. For final engineering approval, please confirm the required closing time (seconds), solenoid voltage, and whether RTJ or RF flanges are required for the 8″ end connections.
