High Pressure Wear Resistant Valve Gate for Oilfield - China Suppliers Factory with Alloy Steel and Precision Machining
Product Description
API 6A standard valve gate is precision-engineered for gate valves in oilfield wellhead and Christmas tree systems. Forged from high-strength alloy steel or stainless steel, it features advanced thermal spray coating (cobalt-coated tungsten carbide, nickel-based tungsten carbide, cobalt-chromium tungsten alloy) for exceptional wear resistance, erosion resistance and corrosion resistance. With precision machining and optimized sealing structure, it ensures tight sealing performance under high pressure (2K-20K psi) and extreme temperature conditions. Compliant with API 6A specifications, available in PR1 and PR2 performance levels, it delivers stable operation, long service life and reliable compatibility for harsh oil and gas exploration environments.
Product Specifications
| Nominal Diameter | 1-1/16"/ 2-1/16"/ 2-9/16"/ 3-1/8"/ 3-1/2"/ 4-1/16"/ 5-1/8"/ 6-5/8"/ 7-1/16"/ 9"/ 11"/ 13-5/8" |
| Working Pressure | 2000psi(2K)/ 3000psi(3K)/ 5000psi(5K)/ 10000psi(10K)/ 15000psi(15K)/ 20000psi(20K) |
| Media | Crude oil/ Natural gas/ Oilfield wastewater/ Mud/ Water/ Oil-gas mixtures |
| Material | AISI 4130/ AISI 4140/ 316L/ 2205 Dual-phase Steel/ 2507 Dual-phase Steel |
| Working Temperature | -46℃ - +121℃ |
| Hardness | HRC75 |
| Bonding Strength | ≥70MPa |
| Porosity | ＜1% |
| Surface Treatment | Supersonic spraying of cobalt-bonded tungsten carbide (WC/Co) / cobalt-chromium-bonded tungsten carbide (WC/CoCr) / cobalt-chromium tungsten alloy (Stellite 20#/NiCr) / nickel-chromium-bonded chromium carbide (Cr₃C₂/NiCr) / nickel-based alloy (Ni60/Ni55) / nickel-based tungsten carbide (WC/Ni) |
Product Features
1
Ultra-high Coating Adhesion
The coating is metallurgically bonded to the substrate, ensuring a strong and non-detachable bond, suitable for high-pressure impact conditions.
2
Extremely Dense Coating
Extremely low porosity effectively blocks corrosive media, resisting cavitation and erosion.
3
Ultra-high Hardness and Wear Resistance
Surface hardness reaches HRC75, with wear resistance far exceeding ordinary welding/electroplating processes.
4
Excellent Corrosion Resistance
Suitable for harsh oilfield media containing sulfur, chlorine, acids, and alkalis, meeting NACE MR0175 standards.
5
High Dimensional Accuracy
Precision grinding after spraying results in a high degree of surface flatness and stable, reliable sealing performance.
6
Extra-long Service Life
Service life is 3-5 times longer than conventional valve gates, significantly reducing replacement and maintenance costs.
7
Suitable for Harsh Conditions
Perfectly matches API 6A standard valves, meeting the needs of high-pressure, high-temperature, and high-wear oil and gas field scenarios.
Product Packaging
Standard Export Packaging
Compliant with international export standards
Inner: Rust-proof Bag
Full corrosion protection for each component
Outer: Fumigation-free Plywood Case / Carton
Safe for sea transportation, shockproof & rustproof
Product Transportation
International Sea Transportation
Land / Railway Transportation
Frequently Asked Questions
Q
What standard does this valve gate comply with, and what performance levels are available?
This valve gate is fully compliant with the API 6A specification, which is the industry standard for wellhead and Christmas tree equipment. It is available in both PR1 (Performance Requirement 1) and PR2 (Performance Requirement 2) levels to meet different operational demands in oil and gas exploration environments.
Q
What pressure ratings and temperature ranges does this valve gate support?
The valve gate supports working pressures from 2,000 psi (2K) up to 20,000 psi (20K), covering 2K, 3K, 5K, 10K, 15K, and 20K ratings. It operates reliably across a temperature range of -46°C to +121°C, making it suitable for both arctic and high-temperature oilfield environments.
Q
What surface coating technologies are applied to improve wear and corrosion resistance?
The valve gate uses advanced supersonic thermal spray coating technology. Available coating materials include cobalt-bonded tungsten carbide (WC/Co), cobalt-chromium-bonded tungsten carbide (WC/CoCr), cobalt-chromium tungsten alloy (Stellite 20#/NiCr), nickel-chromium-bonded chromium carbide (Cr₃C₂/NiCr), nickel-based alloy (Ni60/Ni55), and nickel-based tungsten carbide (WC/Ni). These coatings achieve a surface hardness of HRC75 and porosity of less than 1%.
Q
What materials are used for the valve gate body, and are they suitable for sour service?
The valve gate is forged from high-strength alloy steel or stainless steel, including AISI 4130, AISI 4140, 316L, 2205 Dual-phase Steel, and 2507 Dual-phase Steel. The product meets NACE MR0175 standards, making it suitable for sour service environments containing hydrogen sulfide (H₂S), chlorine, sulfur, acids, and alkalis.
Q
How does the service life of this valve gate compare to conventional products?
Thanks to the ultra-hard thermal spray coating with HRC75 hardness and a bonding strength of ≥70MPa, this valve gate delivers a service life 3 to 5 times longer than conventional valve gates manufactured with ordinary welding or electroplating processes. This significantly reduces downtime, replacement frequency, and overall maintenance costs.
Q
What nominal diameter sizes are available, and how is the product packaged for export?
Nominal diameters range from 1-1/16" to 13-5/8", including 1-1/16", 2-1/16", 2-9/16", 3-1/8", 3-1/2", 4-1/16", 5-1/8", 6-5/8", 7-1/16", 9", 11", and 13-5/8". For export, each product is packed in a rust-proof inner bag and placed in a fumigation-free plywood case or carton, ensuring full protection against shock and corrosion during international sea or land transportation.