Through Conduit Slab Gate Valve for Pipelines
Qisheng’s High-Performance Through Conduit Slab Gate Valves are specifically engineered for crude oil, natural gas, and refined product transmission pipelines. Featuring a full-bore design that allows for the seamless passage of all scraper types, these valves ensure optimal flow and maintenance efficiency. Built to API 6D standards, they offer bi-directional sealing with spring-energized floating seats and a high-strength drive train. With fire-safe certification (API 6FA) and an enclosed yoke for harsh environment protection, Qisheng slab gate valves provide a rugged, reliable solution for critical terminal and pipeline applications.
Description
Qisheng Through Conduit Slab Gate Valve
The Qisheng Through Conduit Slab Gate Valve is a high-performance solution designed for the rigorous demands of crude oil, natural gas, and refined product transmission. Manufactured using high-quality castings from our own foundry and accurately machined components, this valve provides exceptional reliability in pipeline terminals and long-distance transmission lines. Its full-bore design ensures minimal pressure drop and allows for the unrestricted passage of scrapers, making it the premier choice for modern pipeline infrastructure.
Core Engineering & Sealing Features
- Through Conduit Full-Bore Design: The full-bore structure ensures a smooth flow path and allows for the passage of all types of scrapers (pigs) for efficient pipeline cleaning and inspection.
- Spring Energized Floating Seat: Equipped with Inconel coil springs, the floating seats provide positive sealing on both upstream and downstream sides, regardless of pressure conditions.
- Advanced Stem Sealing: Achieves superior leak protection through a double-seal system consisting of graphite sealing and a Lantern Ring with O-ring sealing.
- Emergency Sealant Injection: Integrated injection points for both the seat and stem allow for emergency sealant application to restore sealing integrity in critical situations.
- High-Reliability Back Seat: Provides a secondary stem-to-bonnet seal and ensures the stem cannot be ejected under any internal pressure conditions, enhancing operator safety.
Safety & Ruggedized Design
- Enclosed Yoke Protection: The enclosed yoke design prevents dirt, sand, and contaminants from entering the stem sealing area, making it ideal for installation in desert or sandy environments.
- High Drive Train Strength: Engineered with a high safety factor for all drive train components, including the gate, stem head, yoke, and adapter, ensuring reliable operation under maximum loads.
- Fire Safe & Anti-Static: Fully tested and certified fire-safe per API 6FA and equipped with an anti-static device according to API 6D standards.
- Integrated Position Indicator: A dustproof and waterproof indicator provides a clear visual confirmation of the gate’s position from fully open to fully closed.
Typical Applications & Services
Qisheng Slab Gate Valves are optimized for large-scale fluid transport networks and critical isolation points:
- Media Services: Crude Oil, Natural Gas, and Refined Petroleum Products.
- Infrastructure: Transmission Pipelines, Terminals, and Pumping Stations.
- Harsh Environments: Specialized designs for sandy areas and corrosive services.
Technical & Operating Specifications
Our slab gate valves are manufactured to the strictest API 6D standards to ensure seamless integration into global pipeline projects.
- Product Standard: API 6D
- Fire Safe Standard: API 6FA
- Sealing Options: Soft Seat and Metal-to-Metal Seat available
- Product Range & Sizes:
- Metal Seated (Hard Seal): NPS 2″ – 24″ | Class 150/300/600/900/1500
- Soft Seated (Soft Seal):
NPS 2″ – 48″ | Class 150/300/600
NPS 2″ – 24″ | Class 900/1500