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Globe Valve

Globe Valve

  • Globe Valve Manufacturing Specification   ContentAPI series   Basic design specificationBS 1873 or refer API 600   Pressure-temperature ratingASME B16-34   Structure lengthASME B16-10   Flange type and sizeASME B16-5   B...
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Globe Valve Manufacturing Specification

  ContentAPI series
  Basic design specificationBS 1873 or refer API 600
  Pressure-temperature ratingASME B16-34
  Structure lengthASME B16-10
  Flange type and sizeASME B16-5
  Butt weld end ASME B16-25
Inspection and testAPI 598


Structural style
Globe valve adopts OSY and BB(bolted bonnet), Rotate-Rising stem and hand wheel which is international current gate valve structure.
Body and bonnet
Body and bonnet design is according to precise calculation in order to realize good strength, rigidity and flow capacity. There designs a upper seal support on bonnet that makes packing seal more reliable in the valve full open condition, also replace packing conveniently.
Seat and disc





Seat and disc adopt plane or conical sealing. for different pressure and specification, there are several seat forms below:
1.Seat ring connects or welds female end body by thread for easy disassembly, maintenance and replacement.
2.Directly bead welding sealing surface material on body.
3.For SS valve ,popularly seat sealing surface will be processed molding directly on body.
Stem and stem nut
Stem and stem nut adopt suitable fit clearance and dentoform correction screw drive to assure flexible valve operation and self-locking valve switch condition. A hard stainless steel inlaid on the connection of disc and stem head in order to prevent it extruded and effect disc flexibility by rusting.
Packing
The size and quantity of packing meet the standards and ensure reliable sealing. Packing is graphite( free from asbestos). Packing spacer ring can be provided when customers require.(no packing spacer ring in standard product).
Body gasket
The flange connection form of body and bonnet is bolt fastening. Flange sealing gasket forms below:
CLASS150   & PN1.6, 2.5Mpa flat gasket sealing.
CLASS300   & PN4.0, 6.4Mpa concave-convex gasket sealing.
CLASS600   & PN10.0Mpa and above octagon gasket sealing.

The gasket is inner ring spiral wound gaskets filled graphite which abandoning rubber asbestos plate used before for making good gasket sealing and good disassembling resilience performance.


NOTES:
All casting material complies with ASTM standard, all forging material are choosen chinese grades on equal grounds with ASTM standard.
The material above is general product standards, we can change material according to working condition or customers' requirements and also we reserve the right of complying with standard specification for improving material.
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