Features

DongsanValve’s Cast steel valve are constructed with design of API 600, ASME B16.34 & API 6D. Bolted Bonnet, Outside Screw & Yoke is applied to Gate valve basically. Non rising hand wheel to be provided.

Flexible Wedge for improved seating and ease of operation, especially in high temperature service. Wedges are accurately guided thru the entire stroke. Standard trim is API trim 8 for carbon steel valves, API trim 5 for chrome alloy valves, and API trim 10 for CF8M (T316) valves for optimal performance under normal conditions. Other trim materials available on request.

Seat faces lapped for smooth finish and superior sealing. Stems are non-rotating with surface finish to maximize packing seal for low fugitive emissions. Bonnet and Yoke arms designed for ease of gear, motor or cylinder actuator adaptation. Each valve is shell, seat and backseat pressure tested per industry standard API 598. Gland is two piece gland / gland flange design for optimal alignment and uniform packing compression.

End Flanges have the following raised faces per ASME B16.5: Classes 150-300: 1/16” (2mm). Classes 600-1500: 1/4” (7mm). Weld ends are available per ASME B16.25 or per customer’s specification. Each valve has a unique certification number that is traceable to the valve certification sheet which includes MTR data, pressure test report, inspection report and certificate of conformance.

Other available options as follows:

- Alternate valve materials such as chrome and stainless steel alloys/ Alternate trim materials/ Bypass, drain and other auxiliary connections/ Gear, motor, and cylinder actuators available/ NACE service /Special cleaning for applications such as oxygen or chlorine/ Other options available as specified.

Specifications

Bolted Bonnet/ Flexible or Solid Wedge/ Outside Screw & Yoke/ Full Port/ Flanged Ends or Buttweld Ends/ Operators : Handwheel, Gear or Actuator

- Size Range : NPS 2(DN 50) to NPS 36(DN 900)
- Pressure Rating : ASME Class 150 to 2500
- Wall Thickness & General Design Code : API 600, ASME B16.34
- Face-to-face or End-to-end : ASME B16.10
- Flanged End : ASME B16.5 Flanged End, RF/RTJ
- Buttwelding End : ASME B16.25
- Valve Inspection and Test : API 598
- Materials : CS, LTCS, SS & Duplex, Etc..