ESD Trunnion-Mounted Ball Valve (Reduced Bore 6 x 4)
ESD Trunnion-Mounted Ball Valve (Reduced Bore 6 x 4) - Image 2
ESD Trunnion-Mounted Ball Valve (Reduced Bore 6 x 4) - Image 3
ESD Trunnion-Mounted Ball Valve (Reduced Bore 6 x 4) - Image 4

ESD Trunnion-Mounted Ball Valve (Reduced Bore 6 x 4)

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Description

TECHNICAL DATA SHEET

ESD Trunnion-Mounted Ball Valve (Reduced Bore 6″ x 4″)

1. Product Overview

This product is a 6″ x 4″ Reduced Bore ESD (Emergency Shut-Down) Trunnion-Mounted Ball Valve. Designed to API 6D and API 6A standards, it is engineered for fail-safe critical isolation in high-pressure oil, gas, and petrochemical pipelines. The trunnion-mounted design absorbs line pressure thrust, ensuring low operating torque and reliable bubble-tight sealing. Equipped with a pneumatic spring-return actuator, the valve ensures rapid, automatic closure (Fail-Close) upon loss of instrument air or an emergency trip signal.

2. General Technical Specifications

 
 
Parameter Specification / Data
Product Type ESD Valve, Trunnion-Mounted Ball Valve
Nominal Size (Line Size) NPS 6 (DN150) Flanged Ends
Bore Size NPS 4 (DN100) Reduced Bore
Bore Configuration Reduced Bore (6″ x 4″)
Pressure Rating API 6D: Class 1500 (Based on unit markings)
Available: Class 150 to 4500 / API 6A 3000 to 30000
Body Configuration 2-PC Side Entry / 3-PC Side Entry / Top Entry / Welded
End Connection 6″ RF (Raised Face) or RTJ (Ring Joint) Flanges
Operation Pneumatic Spring-Return Actuator (Fail-Close / ESD)
Applicable Temperature -46°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, with standard API 6D alternatives)

 
 
Part Name Material Specification
Body / Bonnet (Standard) ASTM A216 WCB (Carbon Steel)
Alternative Forged Materials A105, A182 F304, F304L, F316, F316L, F51, F53, A350 LF2, LF3, LF5
Alternative Cast Materials A351 CF3, CF8, CF3M, CF8M, A995 4A, 5A, A352 LCB, LCC, LC2
Special Alloys Monel, Inconel, Hastelloy, Titanium Alloy
Ball (Trim) A182 F304/F316/F51, with Chrome Plating or ENP
Stem A182 F304/F316/F51, 17-4PH
Seat / Seals PTFE, RPTFE, PEEK, Nylon, 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 1500, Size 6)
End Connection ASME B16.5 (NPS 6, Class 1500)
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

  • Reduced Bore Advantage: The 6″ x 4″ 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 6″ to 4″ line sizes.

  • Double Block & Bleed (DBB) / Double Isolation & Bleed (DIB): Allows for verification of seal integrity and safe depressurization of the cavity.

  • Emergency Seat and Stem Injection: Secondary sealing ports for injecting sealant in case of primary seal failure, extending valve life.

  • Anti-Static Device: Ensures electrical continuity between the ball, stem, and body.

  • Anti-Blowout Stem: Prevents accidental ejection of the stem under pressure.

  • Cryogenic or High-Temperature Extended Stem: Available for extreme temperature applications.

6. Actuation & ESD Accessories

 
 
Component Description
Actuator Heavy-duty Pneumatic Spring-Return Actuator (Sized for 4″ bore torque requirements)
Manual Override Top-mounted Handwheel for emergency manual operation
Control Panel Stainless Steel tubing with Filter Regulator, Pressure Gauges, 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 (Reference)

 
 
Marking Description
Size 6″ x 4″ (or NPS 6 x 4)
Rating 1500 (API 6D Class 1500)
Body Material WCB (ASTM A216 WCB)
Brand SAVVY
Tag No. As per customer’s pipeline specification

8. Typical Applications

  • Emergency Shut-Down (ESD) Systems: Critical fail-safe isolation in process plants, refineries, and offshore platforms.

  • High-Integrity Pressure Protection Systems (HIPPS): Rapid isolation to prevent overpressure scenarios.

  • High-Pressure Gas Transmission: Mainline isolation where line size reduces from 6″ to 4″.

  • Sour Gas Service: Sour crude and natural gas handling (with NACE compliant materials).

  • Storage Terminals: Tank farm isolation and manifold control.

Note to Client:
The provided images show a Class 1500 WCB body with a pneumatic spring-return actuator. The 6″ x 4″ 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 6″ end connections.

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