ASTM A995 4A Through Conduit Gate Valve, API 6D, 8 IN, CL1500

Product Name: ASTM A995 4A Through Conduit Gate Valve
Design Standard: API 6D
Body Material: ASTM A995 4A
Size: 8 Inch, DN200
Pressure: Class 1500 LB, PN250
End Connection: RTJ

Slab Through Conduit Gate Valves are manufactured with a full-bore port, rising stem OS&Y, and floating seats and gate, which are pressure-energized to ensure bubble-tight shutoff both upstream and downstream under low and high differential pressures. The design includes double block and bleed capability and automatic relief of excess body pressure as standard features. The smooth, continuous bore minimizes turbulence within the valve, and when in the open position, it produces a pressure drop equivalent to a section of pipe of the same length and diameter. The seat faces are located outside the flow stream, protecting them from erosive flow action. Pigs and scrapers can be 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
» 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
» Temperature Range: -29°C to 595°C
» Medium: Water, gas, oil, etc.
» 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

» Bidirectional Sealing: The valve seat features an O-ring seal and a floating valve seat structure with pre-tension force, enabling bidirectional sealing at the inlet and outlet of the flat gate valve. This design reduces the opening and closing torque to just half that of conventional valves, ensuring easy operation.
» Low Flow Resistance: When fully open, the channel is as smooth as a straight line, with a minimal flow resistance coefficient and virtually no pressure loss. The valve can be cleaned by passing a rough ball through the pipeline.
» Self-Sealing Packing Structure: The packing structure is designed with self-sealing capabilities, eliminating the need for frequent adjustments. The opening and closing are extremely lightweight, with reliable sealing performance. The packing box includes an auxiliary sealing grease injection structure, ensuring absolute reliability and achieving true zero leakage. This solves the common issue of packing leakage found in universal valves.
» Automatic Pressure Relief: When the flat gate valve is closed, it automatically releases high pressure from within the chamber, ensuring safe use.
» Fully Enclosed Design: The fully enclosed structure provides excellent protective performance, making it suitable for all-weather conditions.