Forged A105 Stainless Steel 304/316 CF8 WCB High Temperature Manual Cast Steel Gate Valve

Specification

I. Product Overview

As a key shut-off device in industrial pipeline systems, the custom forged A105 stainless steel 304/316 CF8 WCB high-temperature manual cast steel gate valve serves as a core fluid control component in petroleum, chemical, power, metallurgy, and other industries. Constructed from forged A105 carbon steel and 304/316 stainless steel, combined with cast steel forming processes, this valve achieves on-off control through manual operation. It is suitable for temperature ranges from -29°C to 425°C and pressure classes from PN0.6 to 2.5MPa, stably managing the flow of various media such as cement, oil products, seawater, and gases.

II. Core Features: Multi-dimensional Technical Advantages

Material Combination & Environmental Adaptability
The valve body employs WCB cast steel (complying with ASTM A216 standards) or 304/316 stainless steel (AISI 304/316), while A105 forged carbon steel components are heat-treated for enhanced strength and impact resistance. The stainless steel version resists corrosion from seawater and acid-base media, while the WCB cast steel type suits high-temperature, high-pressure industrial scenarios like steam pipelines and petroleum refining units.
Sealing System & Structural Design
The seal surface undergoes hardening treatment with 2Cr13 stainless steel, and the valve seat is inlaid with Stellite hard alloy. Through grinding processes, mirror-level fitting precision is achieved, meeting bubble-tight standards (API 598 testing requirements). The gate plate and stem feature a rigid connection with a back-seal structure, preventing medium leakage along the stem and ensuring operational safety.
Temperature & Pressure Resistance
With a medium temperature range covering -29°C (low-temperature liquefied gas scenarios) to 425°C (high-temperature steam or thermal oil systems), and a pressure range of PN0.6 to 2.5MPa, it adapts to medium and low-pressure industrial pipelines, satisfying most conventional working conditions.
Operational & Maintenance Convenience
The manual gear transmission design ensures uniform torque output, reducing switching torque by over 30%. Combined with an outside stem and yoke (OS&Y) structure, the valve’s opening/closing status can be visually judged by the stem extension. The bonnet and body are bolt-connected for easy disassembly, facilitating on-site maintenance and seal replacement.

III. Key Attributes: Technical Parameters & Standard Compliance

Attribute Category	Specific Parameters
Diameter Range	DN15~DN1000 (covering full specifications from instrument pipelines to main process lines)
Structure Type	Wedge single gate (rigid structure for high sealing reliability)
Driving Method	Manual (customizable for electric/pneumatic actuator interfaces)
Manufacturing Standards	Compatible with international standards (ANSI, BS, DIN, JIS), supporting customized non-standard designs
Warranty Period	2 years (covering material defects and process issues under normal working conditions)
Medium Compatibility	Cement slurry, crude oil, natural gas, seawater, steam, acid-base solutions (stainless steel version)

Product Overview

IV. Manufacturing Processes: Precision Control from Material to Finished Product

Integration of Forging & Casting Processes
Key pressure-bearing components (e.g., stem, bonnet) use A105 carbon steel forging. Through 1100°C high-temperature forging, internal porosity is eliminated, with grain size reaching Grade 6 or above and tensile strength ≥485MPa. The valve body adopts sand casting (DN≥200) or precision casting (DN≤150) based on diameter. WCB cast steel parts undergo annealing to eliminate internal stress, and the surface is shot-blasted to achieve Sa2.5 anti-corrosion standards.
Precision Machining & Surface Treatment
The seal surface is machined by CNC grinding machines with a surface roughness of Ra≤0.8μm. The valve seat and gate plate form a metal hard seal pair through matching grinding. The stem surface is chrome-plated (plating thickness 0.02~0.05mm) to enhance wear and corrosion resistance, ensuring smooth long-term operation without jamming.
Quality Control System
Implementing ISO 9001:2015 quality management systems, each valve undergoes two key tests:

Hydrostatic Strength Test: The shell is pressurized to 1.5 times the nominal pressure (e.g., 2.4MPa for PN16 valves) with no leakage after 15 minutes of pressure holding.
Seal Performance Test: The seal surface is pressurized to 1.1 times the nominal pressure, holding for 5 minutes with leakage ≤0.01×DN mm³/s (per API 598 standards).

Valve Details

V. Product Advantages: Core Competitiveness in Industrial Scenarios

Multi-Application Adaptability
From low-temperature LNG storage tanks to high-temperature catalytic cracking units, and from offshore platform seawater pipelines to urban heating networks, this valve meets extreme working conditions across industries through flexible material and structural configurations. For example, the 316 stainless steel version resists Cl⁻ ion corrosion in seawater desalination systems, while the WCB cast steel high-temperature type ensures long-term stable operation in thermal power plant main steam pipelines.
Customized Solutions
Supporting OEM/ODM customization, adjustments can be made according to customer needs:

Connection types (flange, welding, threaded);
Anti-static design (conductive paths between stainless steel components to prevent static electricity from gas friction);
Fire-safe structure (API 607 certified, maintaining sealing during fires).

Cost-Efficiency Balance
Forging processes enhance component strength, reducing downtime and maintenance costs from fatigue damage. Cast steel bodies reduce overall weight and manufacturing costs by 20%~30% compared to fully forged valves while maintaining the same pressure-bearing capacity.
Global Service Support
Manufacturing standards comply with international systems, facilitating procurement and installation in overseas projects. A 2-year warranty includes free technical support and parts replacement, with a response time ≤2 hours to ensure worry-free after-sales service.

Application

VI. Application Fields: Full-Scene Coverage of Industrial Fluid Control

Petrochemical Industry
Used in residue oil pipelines of atmospheric-vacuum distillation units, high-temperature steam bypasses in catalytic cracking units, and inlet/outlet shut-off for acid-base storage tanks. The 316 stainless steel material resists corrosion from sulfur-containing media.
Energy & Power Sector
Controls main steam and water supply pipelines in thermal power plant steam-water systems; the WCB cast steel high-temperature type withstands 425°C superheated steam 冲击. In new energy fields, it suits fuel delivery pipelines for biomass energy boilers.
Water Supply & Municipal Engineering
The DN1000 large-diameter version can be used in urban water transmission main pipes, cooperating with butterfly valves for zoned water supply control. In seawater desalination plants, 304 stainless steel prevents marine organism adhesion and electrochemical corrosion in intake pipelines.
Metallurgy & Mining
Controls the opening/closing of blast furnace gas pipelines in steel plants, shuts off tailings slurry transportation pipelines in mines, and regulates kiln flue gas pipelines in the cement industry, ensuring reliable operation.