HVOF Coated FC Gate Valves for Oilfield Applications - High-Strength Alloy Steel from China Suppliers & Factory
Product Description
FC full bore gate is a critical sealing component exclusively designed for API 6A standard oilfield gate valves. Adopting a slab-type full bore structure, it features a consistent flow passage with no diameter reduction, perfectly matching full bore valve cavities to enable unobstructed pipeline pigging and minimal fluid resistance.
Forged integrally from high-strength alloy steel (AISI 4130/4140) or stainless steel, the gate boasts a compact, defect-free structure with exceptional mechanical strength and high pressure resistance (up to 20,000PSI). Its double-sided sealing surfaces are enhanced with HVOF thermal spray coating (WC-Co, Ni-based WC, Co-Cr-W alloy), delivering ultra-high hardness (HRC 75), superior wear resistance, erosion resistance and corrosion resistance.
Processed by CNC precision machining, the sealing surfaces feature ultra-high flatness and finish, ensuring reliable two-way metal hard sealing without leakage under harsh working conditions. Compliant with API 6A temperature grades (K/L/P/U) and performance levels (PR1/PR2), it offers excellent interchangeability, long service life and strong adaptability to onshore/offshore oilfield wellheads, Christmas trees and high-pressure manifolds.
Product Specifications
| Type | FC Full Bore Gate |
| Nominal Diameter | 1-13/16"/ 2-1/16"/ 2-9/16"/ 3-1/16"/ 3-1/8"/ 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) |
| Coating Thickness | 0.03–0.5mm (Customizable) |
Product Features
🔩
Optimized FC full bore structure with flexible design, ensuring two-way tight sealing and smooth switching.
⚙️
Precision forged integral structure complying with API 6A standard, featuring high strength and strong pressure resistance.
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HVOF thermal spray coating with ultra-high hardness, excellent wear, erosion and corrosion resistance.
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CNC precision machined sealing surface with high flatness, stable sealing performance and long service life.
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Strong adaptability to harsh oilfield environments, effectively reducing equipment maintenance frequency.
Product Packaging
📦 Standard Export Packaging
Inner: Anti-rust protective bag
Outer: Fumigation-free plywood box or carton
Shockproof, damp-proof and rust-resistant, guaranteeing safe sea transportation.
Product Transportation
Logistics & Transportation
- 🚢 Ocean Freight
- 🚛 Overland & Rail Freight
Frequently Asked Questions
Q What is an FC full bore gate and how does it differ from a regular gate?
An FC full bore gate features a slab-type full bore structure with a consistent flow passage and no diameter reduction. Unlike standard reduced-bore gates, it perfectly matches full bore valve cavities, enabling unobstructed pipeline pigging, minimal fluid resistance, and more efficient flow management in oilfield applications.
Q What working pressure ratings are available for the FC full bore gate?
The FC full bore gate is available in six working pressure ratings: 2000psi (2K), 3000psi (3K), 5000psi (5K), 10000psi (10K), 15000psi (15K), and 20000psi (20K), covering a wide range of oilfield wellhead and high-pressure manifold requirements.
Q What HVOF coating materials are used on the sealing surfaces?
The sealing surfaces are treated with HVOF (High Velocity Oxygen Fuel) thermal spray coatings, including WC/Co, WC/CoCr, Stellite 20#/NiCr, Cr₃C₂/NiCr, Ni60/Ni55, and WC/Ni. These coatings achieve ultra-high hardness up to HRC 75, with porosity below 1% and bonding strength ≥70MPa.
Q Which API 6A temperature grades and performance levels does the FC gate comply with?
The FC full bore gate is fully compliant with API 6A temperature grades K, L, P, and U, covering a working temperature range of -46°C to +121°C. It also meets API 6A performance levels PR1 and PR2, ensuring reliable sealing performance under demanding oilfield conditions.
Q What materials are available for the FC full bore gate body?
The gate body is available in multiple high-performance materials, including AISI 4130, AISI 4140 high-strength alloy steel, 316L stainless steel, 2205 duplex stainless steel, and 2507 super duplex stainless steel, allowing selection based on media corrosiveness and application environment.
Q What are the packaging and shipping options for the FC full bore gate?
Products are packed in standard export packaging: an anti-rust protective inner bag and a fumigation-free plywood box or carton outer package, designed to be shockproof, damp-proof, and rust-resistant for safe sea transportation. Shipping options include Ocean Freight and Overland & Rail Freight to destinations worldwide.