API 6A Wellhead Valve Manufacturer & Exporter

API 6A wellhead valve manufacturer in India. Gate valves, check valves, choke valves for Christmas tree and wellhead. 2000-20000 PSI. PSL 1-4, PR 1-2. NACE MR0175. Export to Middle East & worldwide.

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What are API 6A Wellhead Valves?

API 6A (ISO 10423) is the specification for wellhead and Christmas tree equipment used in petroleum and natural gas industries. API 6A valves operate under extreme conditions — high pressures up to 20,000 PSI (1380 bar), temperatures from -60°C to +250°C, and corrosive environments containing H2S and CO2. These valves are designed with fail-safe operation, full metal-to-metal sealing, and slab or expanding gate designs that provide positive isolation in production and drilling operations.

API 6A Valve Specifications

ParameterSpecification
Pressure Ratings2,000 / 3,000 / 5,000 / 10,000 / 15,000 / 20,000 PSI WP
Body MaterialsAISI 4130, ASTM A350 LF2, A182 F316, Inconel 625/718, Duplex 2205
Size Range1-13/16" to 7-1/16" (API 6A bore sizes)
End ConnectionsAPI 6BX flanged (ring joint), Studded, Hub end (Cameron/FMC)
Gate DesignSlab gate (through-conduit), Expanding gate
PSL (Product Spec Level)PSL 1, PSL 2, PSL 3, PSL 3G, PSL 4
PR (Performance Req.)PR 1 (standard), PR 2 (enhanced — fire test + gas tight)
Temperature ClassK (-60°C), L (-46°C), P (-29°C), S (-18°C), T (121°C), U (121°C), V (180°C)
TestingAPI 6A Appendix F (fire test), NACE MR0175 / ISO 15156
Material ClassAA, BB, CC, DD, EE, FF, HH

API 6A Valve Types

Slab Gate Valve (Through-Conduit)
Expanding Gate Valve
Ball Valve (Trunnion Mounted)
Check Valve (Swing & Piston)
Adjustable Choke Valve (Needle & Cage)
Positive Choke Valve (Fixed Bean)
Plug Valve
Needle Valve & Bleed Valve

Applications

Christmas tree assemblies
Wellhead equipment (surface & subsea)
Production manifolds
Test manifolds & test separators
Flowline isolation
Choke & kill manifolds (drilling)
BOP (Blowout Preventer) systems
Gas lift & injection systems

Frequently Asked Questions

What is PSL in API 6A and which level do I need?
PSL (Product Specification Level) defines the quality and traceability requirements. PSL 1 is basic (functional testing). PSL 2 adds material traceability and NDE. PSL 3 adds full material verification, hardness testing, and enhanced NDE. PSL 3G adds gas-tight seat test. PSL 4 is the highest level with full material qualification, performance testing, and gas-tight verification. Most production applications require PSL 3 or 3G.
What is the difference between slab gate and expanding gate valves?
A slab gate valve has a single flat gate (slab) that slides between two seat rings. Simple design, reliable, lower cost. An expanding gate uses two gate halves that spread apart (expand) when fully open, creating a metal-to-metal seal with both upstream and downstream seats. Expanding gates provide better double block & bleed isolation but are more complex and expensive.
Do your API 6A valves meet NACE requirements?
Yes. All our API 6A valves for sour service are manufactured per NACE MR0175 / ISO 15156 with controlled hardness (HRC ≤22 for carbon/low-alloy steel), SSC-resistant materials, and full NACE compliance documentation. Material class DD (sour service) is our standard offering for Middle East and offshore applications.
Can you supply API 6A valves for subsea applications?
We manufacture API 6A valves suitable for surface wellhead and Christmas tree applications. For subsea (API 17D) rated equipment with ROV-operated actuators and subsea-specific qualification testing, we partner with specialized subsea equipment manufacturers. Contact us to discuss your specific subsea requirements.

Related Pages

API 6D Pipeline Valve Manufacturer → Pressure Seal Valve Manufacturer → SIL Certified Valve Manufacturer → Inconel Valve Manufacturer → API 602 Forged Valve Manufacturer →

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