Through Conduit Expanding Gate Valve, A216 WCB, 18 IN, CL800

Key Specifications / Features

The Through Conduit Expanding Gate Valve, manufactured per API 6D standards, features a carbon steel ASTM A216 WCB body. With an 18-inch (DN450) size, Class 600 LB (PN100) pressure rating, and full-port design, this valve ensures optimal flow and efficient flow regulation. It includes a rising stem, OS&Y (Outside Stem and Yoke) configuration, and Double Block and Bleed (DBB) feature for enhanced sealing and safety.

Slab Through Conduit Gate Valves are designed with a full-bore port, rising stem OS&Y, and pressure-energized floating seats and gate, ensuring a bubble-tight shutoff both upstream and downstream, even under low and high differential pressures. The valve features double block and bleed capability, along with automatic relief of excess body pressure, as standard. The smooth, continuous bore minimizes turbulence and, when fully open, provides a pressure drop equivalent to a section of pipe of the same length and diameter. With the seat faces located outside the flow stream, they are protected from erosive flow action. Additionally, pigs and scrapers can be safely run through the valve without causing damage.

Technical Specification

» Nominal Diameter: NPS 2-48 Inch(DN50-DN1200)
» Design Pressure: Class 150-2500 LB(PN10-PN420)
» Material: Cast Carbon Steel, Stainless Steel, Duplex Steel, Special Materials, etc.
» End Connections: BW, RF, RTJ
» Operation: Hand wheel, bevel gear, electric, pneumatic
» Temperature Range: -29°C to 595°C
» Medium: Water, gas, oil, etc.
» Design and Manufacture: API 6D, GB/T 19672
» Face to Face (End to End): API 6D, GB/T 19672
» Flanged Connection: ANSI B16.5, GB/T 9113
» Butt Welded End: ANSI B16.25
» Test and Inspection: API 598, JB/T 9092
» OS&Y: Outside Stem and Yoke
» Resilient or Metal Seat Options
» Optional: Locking device or stem extension, Top works to ISO 5211
» Port: Full port

Product Features

» The valve seat features an O-ring seal and a floating valve seat structure with pre-tension force, enabling bidirectional sealing of the inlet and outlet. This structure reduces the opening and closing torque to half that of conventional valves, allowing for easier operation.
» When fully open, the valve provides a smooth, straight-line channel with minimal flow resistance and no pressure loss, and can be cleaned by passing a rough ball through the pipeline.
» The packing structure has self-sealing capabilities, requiring minimal adjustment. The valve operates with lightweight opening and closing, ensuring reliable sealing performance. The packing box is equipped with an auxiliary sealing grease injection system, guaranteeing zero leakage and resolving common leakage issues at the packing.
» When closed, the flat gate valve automatically releases high pressure within the chamber, ensuring safe operation.
» The fully enclosed structure provides excellent protection and adaptability to all-weather conditions.