Valves in bolted bonnet construction are available in pressure classes from 150 to 2500, in a variety of materials and end-connections.
Gate Valves
- API 600/ISO 10434
- 2″ to 72″
- ASME class 150 to 2500
Salient Features:
- Body and bonnet – Cast with uniform sections, precision machined.
- Body: Straight through port without recesses except in the seat area – Minimum resistance to flow, turbulence and erosion.
- Flex wedge: Guide slots in the wedge engage with integral guide ribs in the body, Stem-to-wedge contact close to wedge centre – Better sealing, smoother operation.
- Seal-welded seat ring – Eliminates leakage path between seat ring and body, does not loosen up due to temperature fluctuations or vibration.
- Stem – One-piece construction with forged T-head – Long service life, smoother operation.
Globe Valves
- BS 1873
- 2″ to 24″
- ASME 150 to 2500
Salient Features:
- Body and Bonnet – Cast with uniform sections, precision machined.
- In-situ hard-faced body seat – Eliminates leakage path between seat ring and body.
- Guided plug-type disc, Free-floating stem-disc connection – Uniform seating.
Check Valves
- BS 1868
- 2″ to 36″
- ASME 150 to 2500
Salient Features:
- Body and Bonnet – Cast with uniform sections, precision machined.
- Body: Permits full swing of disc on downstream side – Lower flow resistance and disc erosion.
- Disc: Internally-hinged – No opening on the body, higher integrity.
- Disc secured to hinge using lock nut and pin.
- Disc free to rotate to avoid localized wear.