API 6000# Trunnion Ball Valve

Nominal Bore (DN) 2-1/16″ ~ 13-5/8″ (approx. 52mm ~ 346mm)
Pressure Rating 2,000 psi ~ 5,000 psi
Temperature Rating Class K: -60°F ~ +180°F (-60°C ~ +82°C)
Class L: -50°F ~ +180°F (-46°C ~ +82°C)
Product Specification Level (PSL) PSL 1 ~ PSL 3G
Performance Requirement (PR) PR 1 (Standard closure)

Description

API 6A Trunnion Ball Valve Technical Data Sheet

Product Name: API 6A Trunnion-Mounted Ball Valve
Design Standard: API 6A / ISO 10423
Application: Oil and gas wellhead equipment, Christmas trees, pipelines, and harsh environments (including H₂S/CO₂ sour service, high pressure, high/low temperature).

Basic Model & Size Range

Item	Standard Specification	Optional Customization
Nominal Bore (DN)	2-1/16″ ~ 13-5/8″ (approx. 52mm ~ 346mm)	1-13/16″ ~ 20-1/4″ or larger
Pressure Rating	2,000 psi ~ 5,000 psi	10,000 psi ~ 20,000 psi
Temperature Rating	Class K: -60°F ~ +180°F (-60°C ~ +82°C) Class L: -50°F ~ +180°F (-46°C ~ +82°C)	Class U: 0°F ~ +350°F (-18°C ~ +180°C) High/Low Temp Custom: -328°F ~ +932°F (-196°C ~ +500°C)
Product Specification Level (PSL)	PSL 1 ~ PSL 3G	PSL 4 (Project-based)
Performance Requirement (PR)	PR 1 (Standard closure)	PR 2 (High-cycle/stringent closure)

Design & Manufacturing Standards

Item	Standard / Code
Design & Manufacturing	API 6A / ISO 10423, API 6D (Referenced)
End Connections	ASME B16.5 (Flanged), ASME B16.25 (Butt-weld), Hubbed, Clamp Connectors
Testing & Inspection	API 6A / ISO 10423, API 598
Fire Safe Design	API 6FA, API 607, BS 6755 Part 2
Sour Service (NACE)	NACE MR0175 / ISO 15156 (Material Requirements)
Top Flange Mounting	ISO 5211 (For direct actuator mounting)

Key Technical Parameters

Parameter Category	Description / Value
Body Type	Two-piece or Three-piece bolted body, Forged Steel construction. Optional: Top Entry design for in-line repair.
Operation Type	Manual (with locking device), Pneumatic, Electric, Hydraulic, Pneumatic-Hydraulic.
Sealing Class	Soft Seated: Zero Leakage (API 6A / ISO 5208 Rate A). Metal Seated: FCI 70-2 Class 5 or Class 6.
Flow Direction	Bidirectional (Standard) or Unidirectional.
Seat Design	Spring-assisted / Pressure-assisted sealing. Optional: Single Piston Effect (SPE) / Double Piston Effect (DPE) / Double Block and Bleed (DBB) functionality.
Relief Function	Automatic Body Pressure Relief (Upstream seat disengages when cavity pressure exceeds 1.33 times the rated pressure).

Material of Construction (Typical)

Materials must comply with NACE MR0175 requirements based on PSL and sour service conditions.

Component	Standard Material Options	Corrosion Resistant / Special Alloy Options
Body / Bonnet	Carbon Steel (e.g., 60K, 75K)	Stainless Steel (316/316L), Duplex Stainless Steel, Alloy 625 (Inconel)
Ball / Trunnion / Stem	Stainless Steel (AISI 410/17-4PH) + Coating	Stainless Steel + Stellite 6 Hardfacing / Tungsten Carbide Coating (HVOF)
Seat Support Ring	Carbon Steel / Stainless Steel	Stainless Steel + Stellite Hardfacing
Seal Ring (Insert)	PTFE, PEEK, Nylon, Devlon (self-lubricating)	Reinforced PTFE / Metal-to-Metal (with Graphite)
Bearings / Bushings	Self-lubricating Composite Material (e.g., PTFE composite)	Tungsten Carbide coated journals
Stem/Trunnion Sealing	NBR, FKM (Viton)	TFM (Modified PTFE) / Lip Seals + Fire-safe Graphite Packing

Features & Design Advantages

Trunnion-Mounted Ball / Floating Seat Design: The ball is supported by fixed upper and lower trunnions (shafts), minimizing deformation under high pressure. Seats are spring-loaded and pressure-assisted to ensure bubble-tight bidirectional sealing at both low and high pressures.
Anti-blowout Stem: The stem is internally retained by the bonnet shoulder, preventing stem ejection under abnormal high pressure.
Fire-safe Structure: Designed to API 6FA. In case of fire, if soft seats are destroyed, the ball contacts the metal seat backup to form a secondary metal-to-metal seal. A graphite secondary sealing element in the stem prevents external leakage.
Anti-static Device: Springs and conductive balls are installed between the stem, ball, and body to ensure electrical continuity even with non-metallic seals, preventing static charge buildup.
Emergency Sealant Injection: Optional sealant injection fittings are available for seats and stem. In case of accidental seal failure, special sealant can be injected to temporarily restore sealing.
Double Block and Bleed (DBB): In the fully closed position, the valve isolates both upstream and downstream pressure simultaneously. The body cavity pressure can be relieved via a bleed valve to verify seal integrity.
In-line Maintenance (Top Entry): Top entry design allows for replacement of internal components like the ball and seats without removing the valve body from the pipeline.

Options & Accessories

Extended Bonnet: For cryogenic/low-temperature applications.
Drain / Vent Connections: Threaded connections with plug indicators.
Position Indicator: Visual open/closed indication.
Locking Device: To prevent unauthorized operation.
Actuator Mounting Pad: Standardized to ISO 5211.

GUATANTEE:

SAVVY VALVES is committed to delivering exceptional product quality and worry-free after-sales service. Our valves are guaranteed to provide a minimum service life of 12 months, during which we will supply all necessary spare parts and detailed maintenance instructions free of charge. Within the warranty period, if any non-human-induced damage occurs, we will replace components at no cost and provide professional technical support. After the warranty expires, customers only need to pay for the cost of spare parts, while still benefiting from discounted maintenance services. Our goal is to help clients reduce operational costs and enhance production efficiency through reliable quality and comprehensive after-sales support. Whether for technical inquiries or maintenance needs, our expert team will respond promptly to ensure your valve system maintains optimal performance at all times.

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