HVOF Coated FC Gate for Oilfield Applications - High-Quality China Suppliers and Factory Direct Solutions
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
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1. Optimized FC full bore structure with flexible design, ensuring two-way tight sealing and smooth switching.
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2. Precision forged integral structure complying with API 6A standard, featuring high strength and strong pressure resistance.
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3. HVOF thermal spray coating with ultra-high hardness, excellent wear, erosion and corrosion resistance.
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4. CNC precision machined sealing surface with high flatness, stable sealing performance and long service life.
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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 (FAQ)
Q What is an FC full bore gate and what makes it different from standard gates?
An FC full bore gate is a slab-type sealing component designed specifically for API 6A oilfield gate valves. Unlike reduced-bore designs, it maintains a consistent flow passage with no diameter reduction, allowing unobstructed pipeline pigging and significantly lower fluid resistance compared to standard gates.
Q What materials are available for the FC full bore gate?
The FC full bore gate is available in multiple high-performance materials including AISI 4130, AISI 4140 alloy steel, 316L stainless steel, 2205 dual-phase steel, and 2507 dual-phase steel. Material selection depends on the working environment and media requirements.
Q What is HVOF thermal spray coating and why is it used on the sealing surfaces?
HVOF (High Velocity Oxygen Fuel) thermal spray coating is a supersonic spraying process used to apply ultra-hard coatings such as WC-Co, WC/CoCr, and Stellite alloys onto the sealing surfaces. This process achieves a hardness of up to HRC 75, porosity below 1%, and bonding strength ≥70MPa, providing outstanding wear resistance, erosion resistance, and corrosion resistance under extreme oilfield conditions.
Q What pressure ratings and temperature grades does the FC gate support?
The FC full bore gate supports working pressures from 2,000 PSI (2K) up to 20,000 PSI (20K). It complies with API 6A temperature grades K, L, P, and U, covering a working temperature range of -46°C to +121°C, making it suitable for a wide range of onshore and offshore oilfield applications.
Q What nominal diameters are available for the FC full bore gate?
The FC full bore gate is available in a comprehensive range of nominal diameters: 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", and 13-5/8", covering most standard API 6A gate valve configurations.
Q How is the FC full bore gate packaged and shipped for export?
Each FC full bore gate is packed using standard export packaging: an inner anti-rust protective bag and an outer fumigation-free plywood box or carton. The packaging is shockproof, damp-proof, and rust-resistant to ensure safe delivery via ocean freight or overland and rail freight to international destinations.