HVOF Coated FC Gate for Oilfield Applications - High-Strength Alloy by China Suppliers and 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 | HRC 75 |
| Bonding Strength | ≥ 70 MPa |
| 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 – 0.5 mm (Customizable) |
Product Features
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Optimized FC full bore structure with flexible design, ensuring two-way tight sealing and smooth switching.
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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 what makes it different from standard gates?
The FC full bore gate features a slab-type full bore structure that maintains a consistent flow passage with no diameter reduction. Unlike standard gates, it perfectly matches full bore valve cavities to enable unobstructed pipeline pigging, minimal fluid resistance and reliable two-way metal hard sealing under high-pressure conditions.
Q What pressure ratings are available for the FC full bore gate?
The FC full bore gate is available in six pressure ratings: 2000psi (2K), 3000psi (3K), 5000psi (5K), 10000psi (10K), 15000psi (15K) and 20000psi (20K), making it suitable for a wide range of oilfield wellhead and high-pressure manifold applications.
Q What HVOF coating materials are available for the sealing surfaces?
The sealing surfaces can be treated with various HVOF thermal spray coatings including WC/Co, WC/CoCr, Stellite 20#/NiCr (cobalt-chromium tungsten alloy), Cr₃C₂/NiCr, Ni60/Ni55 (nickel-based alloy) and WC/Ni (nickel-based tungsten carbide). These coatings deliver ultra-high hardness (HRC 75) and outstanding wear, erosion and corrosion resistance.
Q Which API 6A standards and temperature grades does the FC gate comply with?
The FC full bore gate is fully compliant with API 6A standards, covering temperature grades K, L, P and U, and performance levels PR1 and PR2. This ensures excellent interchangeability and reliable operation across a broad range of onshore and offshore oilfield environments.
Q What base materials are used to manufacture the FC full bore gate?
The gate is precision forged from high-strength alloy steel (AISI 4130 or AISI 4140) or stainless steel options including 316L, 2205 dual-phase steel and 2507 dual-phase steel. Integral forging ensures a compact, defect-free structure with exceptional mechanical strength.
Q What are the available nominal diameters and can the coating thickness be customized?
The FC full bore gate is available in twelve nominal diameter sizes ranging from 1-13/16" up to 13-5/8", covering the most common oilfield valve specifications. The HVOF coating thickness ranges from 0.03mm to 0.5mm and can be customized according to specific application requirements and customer specifications.