HVOF Coated FC Gate Valve for Oilfield Applications - High-Strength 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
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 an FC full bore gate and how does it differ from a regular gate?
An FC full bore gate adopts a slab-type full bore structure that maintains a consistent flow passage diameter with no reduction. Unlike standard gates, it perfectly matches full bore valve cavities, enabling unobstructed pipeline pigging and significantly lower fluid resistance during operation.
Q
What materials are available for the FC full bore gate?
The FC full bore gate is available in high-strength alloy steel (AISI 4130 / AISI 4140), stainless steel (316L), and duplex stainless steels including 2205 and 2507 Dual-phase Steel, catering to a wide range of corrosion and pressure requirements.
Q
What is the maximum working pressure this gate can withstand?
The FC full bore gate supports working pressures ranging from 2,000 PSI (2K) up to 20,000 PSI (20K), making it suitable for both standard and ultra-high-pressure oilfield applications including wellheads, Christmas trees, and high-pressure manifolds.
Q
What HVOF coating options are available for the sealing surfaces?
Multiple HVOF coating options are available, including WC/Co, WC/CoCr, Stellite 20#/NiCr, Cr₃C₂/NiCr, Ni60/Ni55, and WC/Ni. These coatings achieve a hardness of HRC 75, porosity below 1%, and bonding strength of ≥70 MPa, ensuring outstanding wear, erosion, and corrosion resistance.
Q
Is the FC full bore gate compliant with API 6A standards?
Yes. The FC full bore gate is fully compliant with API 6A standards, covering temperature grades K, L, P, and U, as well as performance levels PR1 and PR2. This ensures excellent interchangeability and reliable performance across diverse onshore and offshore oilfield environments.
Q
How is the FC full bore gate packaged and shipped internationally?
Each gate is packed with an anti-rust protective inner bag and placed in a fumigation-free plywood box or carton for export. The packaging is shockproof, damp-proof, and rust-resistant to ensure product integrity during sea transportation. Shipping is available via ocean freight or overland and rail freight.