Y Pattern PSB Globe Valve, BS 1873, A352 LCB, 6 IN, CL2500

Product Name: Y Pattern Pressure Seal Bonnet Globe Valve
Design Standard: BS 1873, ASME B16.34
Body Material: ASTM A352 LCB
Size: 6 Inch, DN150
Pressure: Class 2500 LB, PN420
End Connection: BW
Operation: Bevel Gear

The pressure seal globe valves are designed in accordance with BS 1873 and ASME B16.34 standards, making them ideal for high-temperature and high-pressure applications, particularly in fossil fuel power plants. Compared to bolted bonnet valves, these pressure seal valves offer superior sealing reliability at the bonnet joint, resulting in a more compact and rigid design that is also more cost-effective in terms of maintenance during high-temperature and high-pressure service. The two openings for the medium flow are positioned in the same direction, forming a 180° angle. Additionally, the seat and disc seal surfaces are overlaid with iron-based, cobalt-based, or carbide alloys, ensuring long-lasting performance. For larger valve sizes, a main disc and vice disc configuration is used, with medium flowing from the top disc to the bottom disc. This design significantly reduces operating torque and enhances seat tightness, improving overall reliability.

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

Features of Pressure Seal Bonnet Globe Valve

» Efficient Operation: Short stroke design for quick and easy opening/closing.
» Size and Pressure Handling: Suitable for large sizes and high-pressure applications with a relief cone featuring an internal bypass.
» Sealing Options: Disc sealing options include flat sealing or throttle cone with a regulating disc.
» Seat Design: Body seat options available: threaded seat or welded seat.
» Durable Sealing: Full Stellite overlay seat sealing surface for extended durability.
» Ease of Maintenance: Designed for ease of manufacturing and maintenance, ensuring low operational costs.
» Back Seat Sealing Structure: The valve incorporates a back seat sealing structure for improved performance.
» Packing Type: Uses flexible and woven graphite collaboration-type packing for enhanced sealing.
» Flow Control: Reduced port design for specific flow control applications.