Extended Bonnet Globe Valve, DIN 3356, GS-C25, PN40, DN200

Product Name: Extended Bonnet Globe Valve, Bellows Sealed
Design Standard: DIN 3356
Body Material: GS-C25
Size: 8 Inch, DN200
Pressure: Class 300 LB, PN40
End Connection: Flanged
Operation: Handwheel

The Bellows Sealed Globe Valve incorporates advanced foreign technology, utilizing a double bellows design welded to the valve stem to ensure stable operation and eliminate valve vibration caused by plug movement. The design ensures that at high temperatures, the stem remains in isolation from the medium, providing zero leakage. This feature guarantees the valve’s longevity, withstanding tens of thousands of cycles while maintaining strength and toughness. The ergonomic handwheel design enhances ease of use and extends service life, offering smooth and reliable operation.
The bellows cut-off valve is designed with a plug-shaped valve and can feature either a flat or conical sealing face. The valve moves straight along the fluid's centerline during opening and closing. Its low friction between sealing surfaces makes it highly durable and easy to manufacture, which contributes to its widespread use.

Technical Specifications

» Nominal Diameter: DN15–DN400 (1/2–16 Inch)
» Design Pressure: PN16–PN64 (Class 150–600 LB)
» Temperature Range: -29°C to 595°C
» Materials:
  Body: 1.0619, GS-C25, ASTM A216 WCB, WCC, A352 LCB, LCC, A351 CF8, CF8M, CF3, CF3M
  Bellows: SS 304, SS 316, SS 316L, etc
» End Connection: Flanged, Welded, or Threaded Ends
» Operation: Handwheel, Bevel Gear, Electric, Pneumatic
» Design and Manufacture: DIN 3356
» Inspection and Testing: ISO 5208, EN 12266
» Flanged Ends Dimension: DIN 2543, DIN 2544, DIN 2545
» Butt-Welded Ends Dimension: EN 12627
» Face-to-Face and End-to-End: DIN 3202, EN 558-1, ISO 5752
» Pressure-Temperature Ratings: DIN 2401
» Test & Inspection: DIN 3230
» Medium: Water, Gas, Oil, etc.

Product Features

» Reliable Sealing: Bellows Sealed Globe Valves are known for their reasonable structure, reliable sealing, excellent performance, and aesthetic appearance.
» Broad Material Availability: Offering a variety of cast body and trim materials, the KOSEN Bellows Valve often provides the most economical solution for your process and steaming system needs.
» Durable Sealing Surface: The sealing surface is hard-faced with Cr.Alloy, ensuring anti-corrosion, anti-friction, and extended service life. The double sealing design ensures tight shut-off and optimal performance.
» STEM Features: The stem is quenched and tempered with nitriding treatment, providing excellent anti-corrosion and anti-friction properties.
» Optional Stem Position Indicator: Provides a clear visual indication of the valve’s on/off status for improved operational monitoring.