Through Conduit Flat Gate Valve, API 6D, WCB, 8 IN, 900 LB

Product Name: Through Conduit Flat Gate Valve
Features: Full Port, Rising Stem, OS&Y
Design Standard: API 6D
Body Material: ASTM A216 WCB
Size: 8 Inch, DN200
Pressure: Class 900 LB, PN150
End: RF
Operation: Handwheel

Through Conduit Slab Gate Valves are designed with a full-bore port, rising stem OS&Y, and feature floating seats and a pressure-energized gate for bubble-tight shutoff, ensuring reliable sealing both upstream and downstream under low and high differential pressures. These valves offer double block-and-bleed capabilities and automatic relief of excess body pressure as standard, enhancing safety and performance. The smooth, continuous bore minimizes turbulence and, when open, results in a pressure drop comparable to that of a section of pipe with the same length and diameter. The seat faces are positioned outside the flow stream, protecting them from erosive flow action. Additionally, pigs and scrapers can pass through the valve without causing damage.

Technical Specifications

» Nominal Diameter: NPS 2–48 Inch (DN50–DN1200)
» Design Pressure: Class 150–2500 LB (PN10–PN420)
» Material Options: Cast Carbon Steel, Stainless Steel, Duplex Steel, Special Materials, etc.
» End Connections: BW, RF, RTJ
» Operation: Hand Wheel, Bevel Gear, Electric, Pneumatic
» Design and Manufacture: API 6D, GB/T 19672
» Face-to-Face (End-to-End): API 6D, GB/T 19672
» Flanged Connections: ANSI B16.5, GB/T 9113
» Butt Welded Ends: ANSI B16.25
» Testing and Inspection: API 598, JB/T 9092
» Stem Configuration: OS&Y (Outside Stem and Yoke)
» Seat Options: Resilient or Metal Seat
» Optional Features: Locking Device, Stem Extension, Top Works to ISO 5211
» Port Type: Full Port
» Temperature Range: -29°C to 595°C
» Medium: Water, Oil, Gas, etc

Product Features

» Bidirectional Sealing: The valve seat incorporates an O-ring seal and a floating valve seat structure under pre-tension, allowing for bidirectional sealing of the inlet and outlet. The opening and closing torque is only half that of conventional valves, providing ease of operation.
» Minimal Flow Resistance: When fully open, the valve channel is smooth and linear, offering minimal flow resistance and no pressure loss. It can also be cleaned by passing a rough ball through the pipeline.
» Self-Sealing Packing Structure: The packing structure is self-sealing, requiring minimal adjustment and providing lightweight operation with reliable sealing performance. The packing box features an auxiliary sealing grease injection system, ensuring absolute reliability and zero leakage. This design addresses the common leakage issues found in conventional valve packing.
» Automatic Pressure Relief: When the valve is closed, it automatically releases any high pressure inside the chamber, ensuring safe operation.
» All-Weather Protection: The fully enclosed structure offers excellent protection and is adaptable to all-weather conditions.