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Thermal Spray Coated Leak-Proof FC Valve Seat for Petroleum (1).jpg
Thermal Spray Coated Leak-Proof FC Valve Seat for Petroleum (2).jpg
Thermal Spray Coated Leak-Proof FC Valve Seat for Petroleum (3).jpg
Thermal Spray Coated Leak-Proof FC Valve Seat for Petroleum (4).jpg
Thermal Spray Coated Leak-Proof FC Valve Seat for Petroleum (5).jpg

Leak-Proof FC Valve Seat for Petroleum - Thermal Spray Coated by China Suppliers and Factory, High-Performance Solutions

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● Core Functions: Our product features an Automatic Fault Shutdown (FC) mechanism that ensures rapid closure during power failures or abnormalities, enhancing safety and preventing leakage. This is essential for industries such as oil drilling and production, where reliability is critical.

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● Material and Manufacturing Process: Crafted from high-strength alloy substrates and treated with thermal spraying or tungsten carbide, our valves are designed to be wear-resistant and erosion-resistant, ensuring durability in challenging environments.

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● Key Performance Characteristics: These valves exhibit high-pressure adaptability and exceptional sealing performance, offering a long service life that significantly reduces operation and maintenance costs, making them an ideal choice for businesses looking to optimize their operations.

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● Applicable Scenarios: Perfectly suited for oil drilling and oil production equipment, our valves match with gate valves, proving effective in the harsh operating conditions prevailing in oilfields. As a leading China supplier and factory, we are committed to delivering top-quality products that meet international standards.

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    Contact us
    Product Details

    Product Description
    The FC (Failed Close) automatic shut-off valve seat is a core sealing and vulnerable component of gate valves used in oil drilling, production, oil and gas gathering and transportation, downhole operations, and wellhead systems.
    The product employs a professional fail-safe shut-off (FC) design. When sudden conditions occur in oilfield equipment, such as power outages, abnormal system pressure, or actuator malfunctions, the valve seat, in conjunction with the valve structure, automatically and quickly closes, locking the oil and gas medium passage. This fundamentally prevents safety accidents such as blowouts, medium leaks, and equipment malfunctions, strictly adhering to the safety standards for high-risk oilfield operations.
    The valve seat uses high-strength alloy structural steel as its base material, precision-machined using CNC lathes and grinders to ensure assembly accuracy. The sealing surface undergoes a high-velocity oxygen fuel spraying (HVOF) tungsten carbide (WC) strengthening process, resulting in a coating with strong adhesion, high hardness, erosion resistance, and corrosion resistance. It can withstand harsh operating conditions such as sandy mud, high-pressure oil and gas, and corrosive media in oilfields for extended periods, significantly improving the sealing stability and service life of the gate valve. It is a core component of valve systems in onshore oilfields and offshore drilling platforms.
    Thermal Spray Coated Leak-Proof FC Valve Seat for Petroleum (1)
    Thermal Spray Coated Leak-Proof FC Valve Seat for Petroleum (2)
    Thermal Spray Coated Leak-Proof FC Valve Seat for Petroleum (3)
    Product Specifications
    Type FC Valve Seat
    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" (custom sizes available upon request)
    Working Pressure 2000psi(2K)/ 3000psi(3K)/ 5000psi(5K)/ 10000psi(10K)/ 15000psi(15K)/ 20000psi(20K) (Customized solutions are available for high-temperature working conditions.)
    Media Crude oil, natural gas, drilling mud, sand-containing oil and gas, corrosive oil and gas media
    Material High-strength alloy structural steel (42CrMo/40CrNiMo premium grade)
    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)
    Compatible Equipment Oilfield gate valves, Christmas tree gate valves, drilling high-pressure valves
    Pressure Rating Suitable for high-pressure oilfield conditions (custom pressure ratings available)
    Sealing Performance Zero leakage under high pressure, suitable for stringent sealing requirements in oilfields
    Application Areas Onshore oilfields, offshore drilling platforms, oil and gas gathering and transmission pipelines, downhole equipment
    Product Features
    🔒 1. Fail-Safety Assurance

    Employs FC (Failed Close) automatic shut-off design, quickly closing and locking in case of power failure or equipment malfunction to prevent oil and gas leaks, complying with oilfield safety operation regulations.

    🛡️ 2. Ultra-Wear-Resistant and Erosion-Resistant

    The sealing surface features a tungsten carbide thermal spray coating with a hardness ≥ HRC75, strongly resisting high-speed erosion from sand-containing media, resulting in a service life far exceeding that of ordinary valve seats.

    ⚙️ 3. High-Pressure Sealing Stability

    Precision-machined sealing surfaces achieve high precision in smoothness and flatness, ensuring zero leakage and no pressure relief under high-pressure conditions, providing long-lasting and reliable sealing performance.

    💪 4. Strong Corrosion and Impact Resistance

    Double corrosion resistance of the substrate and coating, suitable for harsh conditions such as salt spray, acidic oil and gas, and mud; the high-strength substrate is impact-resistant, non-deformable, and crack-free.

    🔧 5. Precise and Universal Assembly

    Standard structural dimensions perfectly match various oil gate valves, facilitating easy installation, smooth opening and closing without jamming, and requiring no equipment modification.

    🎯 6. Strong Customization and Adaptability

    Supports customization of size, material, coating, and pressure rating to meet the specific needs of different oilfield equipment and operating conditions.

    📉 7. Significant Cost Reduction and Efficiency Improvement

    Ultra-long service life reduces replacement frequency, lowers equipment downtime and maintenance costs, and improves oilfield operation efficiency.

    Thermal Spray Coated Leak-Proof FC Valve Seat for Petroleum (4)
    Thermal Spray Coated Leak-Proof FC Valve Seat for Petroleum (5)
    Thermal Spray Coated Leak-Proof FC Valve Seat for Petroleum (6)
    Product Packaging

    Standard Export Packaging Specification

    Outer Layer: Fumigation-free plywood box or heavy-duty carton.

    Protection: The packaging system is designed to be impact-resistant, moisture barrier, and anti-corrosive, guaranteeing the integrity of the goods during maritime transit.

    Product Transportation

    Logistics & Delivery

    • ● Maritime Transport
    • ● Land & Rail (Surface Transport)
    Frequently Asked Questions (FAQ)
    Q What does "FC" mean in the FC Valve Seat, and how does it work?
    "FC" stands for "Failed Close." It refers to a fail-safe design where the valve seat automatically closes and locks the oil and gas passage when unexpected events occur — such as power outages, abnormal system pressure, or actuator failures. This prevents blowouts, leaks, and equipment damage without requiring manual intervention.
    Q What surface treatment is applied to the FC Valve Seat, and why is it important?
    The sealing surface is treated using High-Velocity Oxygen Fuel (HVOF) spraying with tungsten carbide (WC)-based coatings. This process produces a dense, high-hardness coating (≥ HRC75) with excellent adhesion (≥70MPa) and porosity below 1%. It significantly improves resistance to wear, erosion from sand-containing media, and corrosion from harsh oilfield environments, greatly extending service life.
    Q What pressure ratings and sizes are available for the FC Valve Seat?
    The FC Valve Seat is available in working pressures from 2,000 psi (2K) up to 20,000 psi (20K), covering a wide range of nominal diameters from 1-13/16" to 13-5/8". Custom sizes, pressure ratings, and materials are also available upon request to meet specific oilfield equipment requirements.
    Q Is the FC Valve Seat compatible with existing oilfield gate valves without modification?
    Yes. The FC Valve Seat is manufactured to standard structural dimensions that are compatible with most oilfield gate valves, Christmas tree gate valves, and drilling high-pressure valves. Installation is straightforward, with smooth operation and no need for equipment modification.
    Q What media and operating environments is the FC Valve Seat suitable for?
    The FC Valve Seat is designed for use with crude oil, natural gas, drilling mud, sand-containing oil and gas, and corrosive media. It operates reliably in temperatures ranging from -46°C to +121°C and is suitable for onshore oilfields, offshore drilling platforms, oil and gas gathering and transmission pipelines, and downhole equipment.
    Q How is the FC Valve Seat packaged and shipped internationally?
    The FC Valve Seat is packaged in fumigation-free plywood boxes or heavy-duty cartons with impact-resistant, moisture-barrier, and anti-corrosive protection to ensure product integrity during transit. It is available for shipment via maritime transport or land and rail (surface transport) to destinations worldwide.

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