WC9 Alloy Steel BW Welded 1500LB High Temperature Gate Valve - API600 Compliant

Product Overview

he WC9 Alloy Steel BW Welded 1500LB High Temperature Gate Valve is a specialized extreme-service valve engineered for high-pressure (1500LB/PN260) and high-temperature industrial applications, integrating the superior heat resistance of WC9 2.25Cr-1Mo alloy steel, butt-welded (BW) leak-proof connections, and strict API 600 compliance. As a cast alloy steel (ASTM A217 WC9), it offers exceptional creep strength, hydrogen attack resistance, and sulfidation resistance, operating reliably up to 595℃ (1100°F) — ideal for handling superheated steam, hydrogen-rich fluids, and corrosive process streams. Rated for 1500LB (26.0 MPa / 3770 psi) working pressure, this gate valve features a full-port wedge disc design and BW welded ends (ASME B16.25) for permanent, high-integrity installation. Compliant with API 600, ASME B16.34, and API 598 standards, it is widely trusted in oil & gas hydroprocessing, power generation, and petrochemical industries where leak-free performance and extreme temperature tolerance are critical.

Key Features & Advantages

1.ASTM A217 WC9 Alloy Steel Construction

Manufactured from WC9 2.25Cr-1Mo cast alloy steel (chromium 2.00-2.75%, molybdenum 0.90-1.20%, carbon ≤0.18%), delivering superior high-temperature performance up to 595℃ (1100°F). The optimized chemical composition ensures excellent creep resistance (critical for long-term high-heat service) and resistance to hydrogen attack, making it the preferred material for refinery hydrotreaters, power plant steam lines, and hydrogen-rich systems. With a tensile strength of 485-655 MPa and yield strength ≥275 MPa, WC9 maintains structural integrity under extreme temperature-pressure cycling.

2.1500LB (PN260) High-Pressure Rating

Rated for working pressures up to 26.0 MPa (3770 psi) at ambient temperatures, with pressure-temperature ratings aligned to ASME B16.34 standards. At 538℃ (1000°F), the valve retains a working pressure of 17.2 MPa (2495 psi), ensuring stable performance in high-temperature high-pressure (HTHP) systems. The reinforced body wall and precision-engineered internal components (forged stem, Stellite-hardened seats) handle pressure cycling without deformation or leakage.

3.Butt-Welded (BW) End Connection

Equipped with butt-welded ends per ASME B16.25 standards, featuring a smooth weld prep design that eliminates flange-related leakage risks — critical for HTHP applications where even minor leaks can cause safety hazards. The BW connection ensures a permanent, vibration-resistant joint that minimizes pressure drop and installation space, compatible with standard carbon steel, alloy steel, and stainless steel pipelines (1/2"–16" / DN15–DN400). Welded ends are ideal for high-vibration environments (e.g., power plant turbines) and corrosive media where flanged gaskets may degrade.

4.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-pressure projects.

5.Reliable Shutoff & Flow Efficiency

Features a rigid wedge disc design with precision-machined seating surfaces, optionally overlay-welded with Stellite 6 for enhanced wear, erosion, and corrosion resistance. The full-port flow channel minimizes pressure loss (Cv value optimized) when fully open, reducing energy consumption 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 1500LB 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.Wide Operating Temperature Range

Suitable for extreme temperature conditions from -29℃ (-20°F) to 595℃ (1100°F), adapting to diverse HTHP environments such as supercritical steam systems, molten salt processes, and hydrogen reformers. WC9’s austenitic-ferritic microstructure prevents embrittlement at low temperatures and creep deformation at high temperatures, outperforming standard carbon steel and lower-alloy materials (e.g., WC6).

Technical Specifications

Applications

The WC9 Alloy Steel BW Welded 1500LB High Temperature Gate Valve is ideally suited for extreme HTHP industrial systems, including:

•Oil & gas hydroprocessing (hydrotreaters, hydrocrackers, hydrogen reformers)

•Petrochemical and chemical processing (high-temperature reactors, molten salt heat exchangers)

•Power generation (supercritical thermal power plants, main steam lines, hot reheat systems)

•Refinery heaters (crude oil and vacuum heater inlet/outlet lines)

•Hydrogen service systems (hydrogen recycle compressors, high-pressure hydrogen pipelines)

•Sour gas processing (NACE MR0175 compliant configurations for H2S-containing media)

Why Choose Our WC9 BW Welded 1500LB Gate Valve?

✅ Extreme Temperature-Pressure Tolerance: WC9 alloy + 1500LB rating handles 595℃/26 MPa, outperforming carbon steel in HTHP applications.

✅ Leak-Proof BW Connections: ASME B16.25 welded ends eliminate flange leakage risks, ideal for critical safety systems.

✅ API 600 Reliability: Complies with global standards for consistent performance in industrial critical services.

✅ Hydrogen & Creep Resistance: 2.25Cr-1Mo composition prevents hydrogen attack and creep deformation, extending service life.

✅ Low Energy Consumption: Full-port design minimizes pressure drop, optimizing operational efficiency.

✅ Global Compatibility: ASME/API certifications and BW connections fit international piping systems, facilitating cross-border projects.

Order Information

Contact our technical sales team for personalized quotes, 2D/3D drawings, ASTM A217 WC9 material certificates (EN 10204 3.1), or sample requests. We provide professional HTHP 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 Alloy Steel BW Welded 1500LB High Temperature Gate Valve

A WC9 Alloy Steel BW Welded 1500LB High Temperature Gate Valve is a heavy duty isolation valve designed for severe service involving elevated temperature and pressure. WC9 is a chromium molybdenum alloy steel known for excellent creep strength and thermal stability. The gate moves vertically to provide full open or full closed operation with minimal flow restriction. Butt welded ends create a permanent, leak resistant connection, making the valve ideal for steam, refinery, and power generation systems.

Why the WC9 Alloy Steel BW Welded 1500LB High Temperature Gate Valve Matters

This valve is essential in applications where materials must withstand prolonged exposure to high temperature and pressure. WC9 alloy steel resists thermal fatigue, oxidation, and deformation, helping maintain structural integrity over time. The welded end connection reduces potential leakage points and supports a compact piping layout. Reliable shutoff protects boilers, turbines, and process equipment, ensuring safe and stable plant operation under demanding service conditions.

Common Product Types by WC9 Alloy Steel BW Welded 1500LB High Temperature 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 compensate for thermal expansion and improve sealing. Solid wedge versions are selected for stable operating conditions. Outside screw and yoke configurations allow easy maintenance and visible stem movement. Specialized hardfaced trims are available for applications involving erosion and high temperature wear.

Key Advantages of WC9 Alloy Steel BW Welded 1500LB High Temperature Gate Valve

The valve offers excellent resistance to heat, pressure, and thermal stress. WC9 alloy steel provides strong mechanical properties and long term dimensional stability. The full bore design minimizes pressure loss when fully open. Butt welded ends improve system integrity and reduce leakage risk. The robust wedge and seat construction ensures dependable sealing, long service life, and reduced maintenance in severe industrial environments.

WC9 Alloy Steel BW Welded 1500LB High Temperature Gate Valve Machine Structure and Core Stations

Manufacturing begins with casting the body, bonnet, wedge, and stem using WC9 alloy steel, followed by heat treatment to develop high temperature strength. Core stations include CNC machining of weld ends, sealing surfaces, guides, and threads. Hardfacing is applied to seats and wedge surfaces. Assembly stations install the wedge, stem, packing, and bonnet. Final operations include pressure testing, non destructive inspection, coating, marking, and packaging.