HVOF Coated FC Gate for Oilfield Applications - High-Strength China Factory Suppliers with Excellent Wear Resistance
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
1
Optimized FC full bore structure with flexible design, ensuring two-way tight sealing and smooth switching.
2
Precision forged integral structure complying with API 6A standard, featuring high strength and strong pressure resistance.
3
HVOF thermal spray coating with ultra-high hardness, excellent wear, erosion and corrosion resistance.
4
CNC precision machined sealing surface with high flatness, stable sealing performance and long service life.
5
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 the maximum working pressure of the FC Full Bore Gate?
The FC Full Bore Gate supports working pressures up to 20,000 PSI (20K), covering the full range of API 6A pressure ratings including 2K, 3K, 5K, 10K, 15K, and 20K, making it suitable for both standard and ultra-high-pressure oilfield applications.
Q
What HVOF coating materials are available for the sealing surface?
The sealing surface can be coated with a range of HVOF thermal spray materials, including WC/Co, WC/CoCr, Stellite 20#/NiCr (Co-Cr-W alloy), Cr₃C₂/NiCr, Ni60/Ni55 nickel-based alloys, and WC/Ni. Each option delivers ultra-high hardness (HRC 75), excellent wear resistance, erosion resistance, and corrosion resistance. Coating thickness ranges from 0.03 to 0.5mm and is fully customizable.
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 integrity under both standard and demanding service conditions.
Q
What base materials are used to manufacture the FC Full Bore Gate?
The gate is precision forged from high-strength alloy steels including AISI 4130 and AISI 4140, as well as stainless steel grades such as 316L, 2205 Dual-phase Steel, and 2507 Dual-phase Steel. The integral forging process ensures a compact, defect-free structure with excellent mechanical strength and pressure resistance.
Q
What are the typical application scenarios for the FC Full Bore Gate?
The FC Full Bore Gate is widely used in onshore and offshore oilfield wellheads, Christmas trees, and high-pressure manifolds. Its full bore structure allows unobstructed pipeline pigging and minimal fluid resistance, making it ideal for handling crude oil, natural gas, oilfield wastewater, mud, water, and oil-gas mixtures.
Q
How is the FC Full Bore Gate packaged for international export?
Each FC Full Bore Gate is packed using standard export packaging: an anti-rust protective inner bag combined with a fumigation-free plywood box or carton as the outer packaging. The packaging is shockproof, damp-proof, and rust-resistant, ensuring the product arrives safely via ocean freight or overland and rail freight.