ASME B16.34 PSB Globe Valve, ASTM A216 WCB, 8 Inch, 2500 LB

Product Name: ASME B16.34 Pressure Seal Bonnet Globe Valve
Design Standard: BS 1873, ASME B16.34
Body Material: ASTM A216 WCB
Size: 8 Inch, DN200
Pressure: Class 2500 LB, PN420
End Connection: RTJ
Operation: Bevel Gear

The pressure seal globe valves are designed in accordance with BS 1873 and ASME B16.34 standards for high-temperature and high-pressure applications. These valves are widely used in fossil fuel power plants. Compared to bolted bonnet joint valves, they provide reliable sealing of the bonnet joint, making pressure seal valves more compact, rigid, and cost-effective for maintenance in high-temperature and high-pressure environments.

The two openings for medium flow in and out are aligned in the same direction, forming an angle of 180°. Additionally, the seat and disc seal surfaces are overlaid with iron-based alloys, cobalt-based alloys, or carbide alloys for extended service life. For larger valves, the design incorporates both a main and a vice disc, with medium flowing from the upper disc to the lower disc. This configuration significantly reduces operating torque and improves the reliability of seat tightness performance.

Technical Specifications

» Nominal Diameter: NPS 2–24 Inch (DN50–DN600)
» Design Pressure: Class 600–2500 LB (PN10–PN420)
» Materials: ASTM A216 WCB, WCC, A217 WC6, WC9, A351 CF8, CF8M, CF3, CF3M, A352 LCB
» End Connection: RF, RTJ, BW
» Design and Manufacture: ANSI B16.34, BS 1873
» Face to Face (End to End): ANSI B16.10
» Flanged Connection: ANSI B16.5
» Butt Welded End: ANSI B16.25
» Test and Inspection: API 598
» Temperature Range: -29°C to 595°C
» Medium: Water, Gas, Oil, and other Fluids
» Key Components:
  A. Backup Ring: Absorbs internal pressure-induced thrust
  B. Thrust Ring: Protects the soft metallic gasket from deformation
  C. Gasket: Unique angular design for superior sealing

Product Features

» Short Stroke Design: Ensures easy and quick open/close functionality.
» High-Performance Relief: For large sizes and high pressures, the relief cone acts as an internal bypass.
» Versatile Disc Sealing Options: Choose from flat sealing or throttle cone (regulating disc) configurations.
» Flexible Body Seat Options: Available with either a threaded seat or a welded seat.
» Durable Sealing Surface: Full Stellite overlay provides superior seat sealing performance.
» Manufacturing and Maintenance: Optimized for efficient manufacturing processes and easy maintenance.
» Back Seat Sealing Structure: Designed to enhance reliability and performance.
» Advanced Packing Technology: Utilizes a combination of flexible and woven graphite packing for enhanced sealing.
» Reduced Port Size: Optimizes flow and efficiency.