Product Overview
The WC9 High Temperature High Pressure Bevel Gear API600 Gate Valve is a specialized industrial valve engineered for extreme high-temperature and high-pressure applications, integrating the superior heat resistance of WC9 alloy steel with the labor-saving bevel gear transmission and strict API 600 compliance. As a 2.25Cr-1Mo cast alloy steel (ASTM A217 WC9) , WC9 offers exceptional creep strength, hydrogen attack resistance, and sulfidation resistance, making it ideal for services up to 595℃ (1100°F) . Rated for pressure classes up to 2500LB (PN 420) and equipped with a precision bevel gear mechanism, this gate valve delivers reliable shutoff, minimal flow resistance, and easy operation for large-size or high-torque requirements. Compliant with API 600, ASME B16.34, and API 598 standards, it is widely trusted in oil & gas hydroprocessing, power generation, and petrochemical industries, handling media such as high-temperature steam, hydrogen-rich fluids, and corrosive process streams.
Key Features & Advantages
1.ASTM A217 WC9 Alloy Steel Construction
Manufactured from WC9 cast alloy steel—an industry-standard 2.25Cr-1Mo material (chromium 2.00-2.75%, molybdenum 0.90-1.20%) —offering superior high-temperature performance up to 595℃ (1100°F) . The alloy’s optimized chemical composition (carbon 0.05-0.18%) ensures excellent creep resistance and resistance to hydrogen attack, critical for refinery hydrotreaters, hydrocrackers, and power plant steam systems . With a minimum tensile strength of 485 MPa and yield strength of 275 MPa, WC9 delivers robust mechanical performance under extreme temperature-pressure cycling .
2.API 600 Standard Compliance
Fully adheres to API 600 specifications for bolted bonnet steel gate valves, including heavy-wall body construction, full-port flow channels, and rigid design for petroleum refinery and critical industrial services . Complies with API 598 (inspection and testing) and ASME B16.34 (pressure-temperature ratings), ensuring dimensional accuracy, interchangeability, and leak-free performance (API 598 Class IV leakage rating) . API certification guarantees compatibility with global industrial systems, facilitating cross-border procurement for high-temperature projects.
3.High Temperature & Pressure Capacity
Rated for pressure classes from 150LB to 2500LB (PN 10 to PN 420) , with pressure-temperature ratings aligned to ASME B16.34 standards . At 595℃ (1100°F), the valve maintains reliable performance for high-temperature media such as superheated steam and molten process fluids . WC9’s superior heat resistance outperforms WC6 steel (max 565℃) , making it the preferred choice for advanced steam cycles and hydrogen-rich environments .
4.Bevel Gear Transmission System
Equipped with a high-precision bevel gear mechanism that reduces operating torque by 30-50% compared to manual handwheel valves . The gear-driven design enables effortless operation of large-size (DN15-DN400) or high-pressure valves, with self-locking performance to prevent valve stem rotation caused by media pressure . The modular gearbox features a dust-proof cover and corrosion-resistant housing, ensuring smooth operation in harsh industrial environments. Optional electric or pneumatic actuation integration is available for remote control requirements.
5.Reliable Shutoff & Flow Efficiency
Features a wedge disc design (rigid or flexible) with precision-machined seating surfaces, optionally overlay-welded with Stellite for enhanced wear and corrosion resistance . The full-port flow channel minimizes pressure loss when fully open, optimizing energy efficiency for large-volume fluid transfer . The metal-to-metal seal meets API 598 Class IV leakage standards, ensuring tight shutoff and preventing media waste in critical applications .
6.Pressure Self-Sealing Bonnet Design
Incorporates a pressure self-sealing bonnet structure that enhances sealing performance as system pressure increases, eliminating bonnet leakage risks in high-temperature and high-pressure services . The bolted bonnet with backseat design allows in-line maintenance—inspection, repair, or replacement of internal components (stem, disc, seat)—without removing the valve from the pipeline, reducing downtime and maintenance costs .
7.Global Compatibility & Compliance
End connections are available in flanged (ASME B16.5) or butt-welded (ASME B16.25) configurations, ensuring compatibility with international piping systems . All WC9 castings undergo mandatory heat treatment (normalize + temper) and radiographic examination per ASME B16.34, with mill test certificates (EN 10204 3.1) providing full chemistry and mechanical property documentation . Optional NACE MR0175 certification is available for sour service applications.
Technical Specifications
| Parameter | Details |
| Valve Type | Gate Valve (Bolted Bonnet, Wedge Disc) |
| Body/Bonnet Material | WC9 Alloy Steel (ASTM A217) – 2.25Cr-1Mo |
| Trim Material | 13Cr Stainless Steel / Stellite Overlay (API 598 Trim 8) |
| Pressure Class | 150LB – 2500LB (PN 10 – PN 420) |
| End Connection | Flanged (ASME B16.5) / Butt-Welded (ASME B16.25) |
| Size Range | 1/2" – 16" (DN 15 – DN 400) |
| Operating Temperature | -29℃ to 595℃ (-20°F to 1100°F) |
| Operation Mode | Bevel Gear Manual / Electric/Pneumatic Actuated (Optional) |
| Leakage Class | API 598 Class IV |
| Design Standards | API 600, ASME B16.34, ASME B16.5/B16.25 |
| Test Standards | API 598 (Hydrostatic Shell/Seat Test, Gas Leakage Test) |
| Mechanical Properties (WC9) | Tensile Strength: 485-655 MPa; Yield Strength: ≥275 MPa; Elongation: ≥20% |
| Optional Features | Anti-static Device, Position Indicator, Locking Device, Extended Bonnet, Fire-safe Design (API 607/ISO 10497) |
Applications
The WC9 High Temperature High Pressure Bevel Gear API600 Gate Valve is ideally suited for extreme service industrial systems, including:
•Oil & gas hydroprocessing (hydrotreaters, hydrocrackers, hydrogen reformers)
•Petrochemical and chemical processing (high-temperature reactors, molten salt systems)
•Power generation (supercritical thermal power plants, main steam lines, hot reheat systems)
•Refinery heaters (crude oil and vacuum heater transfer lines)
•Hydrogen service systems (hydrogen recycle compressors, high-pressure hydrogen pipelines)
•Sour gas processing (NACE MR0175 compliant configurations)
Why Choose Our WC9 Bevel Gear API600 Gate Valve?
✅ Extreme Temperature Resistance: WC9 alloy steel operates up to 595℃, outperforming standard carbon steel in high-heat applications .
✅ Superior Creep & Hydrogen Resistance: 2.25Cr-1Mo composition prevents creep deformation and hydrogen attack in harsh environments .
✅ Effortless Operation: Bevel gear transmission reduces torque, enabling easy operation of large-size/high-pressure valves .
✅ API-Certified Reliability: Complies with API 600 standards for consistent performance in critical industrial applications .
✅ Global Compatibility: ASME standard connections and certifications facilitate cross-border project integration.
✅ Durable Construction: Forged/wrought trim components and pressure self-sealing bonnet ensure long service life in extreme cycling .
Order Information
Contact our technical sales team for personalized quotes, 2D/3D drawings, ASTM A217 WC9 material certificates, or sample requests. We provide professional extreme-temperature valve solutions and global logistics support.
•Minimum Order Quantity (MOQ): 1 Unit
•Lead Time: 15-35 Working Days (Standard Sizes); Customized Orders: 35-50 Working Days
•Payment Terms: T/T (30% Advance + 70% Against B/L Copy), L/C, Western Union
•Shipping: Sea Freight (FCL/LCL), Air Freight, Express (DHL/FedEx/UPS)
•Packaging: Anti-corrosion Coating + Wooden Case + Custom Labeling (Meets Export Standards)
•After-Sales Service: 12-Month Warranty, Technical Support, and Spare Parts Supply
What Is a WC9 High Temperature High Pressure Bevel Gear API600 Gate Valve
A WC9 High Temperature High Pressure Bevel Gear API600 Gate Valve is a heavy duty isolation valve designed for severe service in steam, refinery, and power generation systems. WC9 is a chromium molybdenum alloy steel that offers excellent strength, creep resistance, and thermal stability at elevated temperatures. The wedge gate moves vertically to provide full open or full closed operation with minimal flow restriction. A bevel gear operator delivers smooth and controlled actuation, while API600 construction ensures dependable performance.
Why the WC9 High Temperature High Pressure Bevel Gear API600 Gate Valve Matters
This valve is important because it maintains reliable shutoff under conditions that impose intense thermal and mechanical stress. WC9 alloy steel resists oxidation, deformation, and thermal fatigue, helping preserve structural integrity over long service periods. The bevel gear mechanism reduces operating effort and improves control for large diameter valves. API600 design requirements ensure robust construction, protecting critical equipment and supporting safe and stable process operation.
Common Product Types by WC9 High Temperature High Pressure Bevel Gear API600 Gate Valve
Common product types include bolted bonnet gate valves, pressure seal gate valves, and welded bonnet gate valves. Flexible wedge designs are widely used to accommodate thermal expansion and improve sealing performance. Solid wedge versions are selected for stable operating conditions. Flanged, butt welded, and socket welded end connections are available. Hardfaced trim options enhance resistance to wear, erosion, and high temperature service conditions.
Key Advantages of WC9 High Temperature High Pressure Bevel Gear API600 Gate Valve
The valve offers excellent resistance to heat, pressure, and thermal cycling. WC9 alloy steel provides strong mechanical properties and long term dimensional stability. The full bore design minimizes pressure loss when fully open. The bevel gear operator allows smoother operation and higher torque with less manual effort. API600 compliant construction ensures reliable sealing, extended service life, and reduced maintenance in demanding industrial applications.
WC9 High Temperature High Pressure Bevel Gear API600 Gate Valve Machine Structure and Core Stations
Manufacturing begins with casting the body, bonnet, wedge, and yoke from WC9 alloy steel, followed by heat treatment to develop high temperature strength. Core stations include CNC machining of sealing surfaces, guide slots, flange faces, and stem threads. Hardfacing is applied to seats and wedge surfaces. Assembly stations install the stem, wedge, packing, bonnet, and bevel gear operator. Final operations include non destructive inspection, pressure testing, coating, marking, and packaging.
