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DOCTOR VALVE
Introduction
DoctorValve is a new division of PT. Grand Kartech, focusing in servicing,
repairing/reconditioning, and up grating valve with highest standard
quality.
DoctorValve Services
- Body Seating Surface
- Disc and/or Plug Seating Surface
- Back Seating Surface
- Stem and Yoke Sleeve Assembly
- End Connection
Standard & Specification References
- API 600 “Flange and butt-welding end steel gate and plug valves for refinery use”.
- ANSI B-16-5 “Steel pipe flange and fitting”.
- ANSI B 16-10 “Flange to face and end to end dimension of ferrous valve”.
- ANSI Standard B 16.25 “Butt welding end”.
- ANSI Standard B 16.34 “Steel valve flanged and butt welding ends”.
- ANSI Standard B 2.1 “Pipe thread”.
- MSS Standard Practice SP-6 Standard finished for contact face of pipe flange and connection end flange of valve & fitting.
- MSS Standard practice SP-25 Standard marking system for valve & fitting, flange and union.
- MSS Standard practice SP-55 for visual inspection.
Quality of Repaired Valves
For all valves repaired or modified by manufacturer, DoctorValve shall
meet the requirements of the specification of the valve and have quality
level consistent with PT. GRAND KARTECH’s.
Type of Valve
- Gate valve
- Globe Valve
- Check Valve
- Ball Valve
- Plug Valve
- Butterfly Valve
Valve Repair Process
- Inspection
- To determine the require repair and the economic value. Material Identifications:
- Number of Pieces
- Size of Valve
- Type of Valve
- ANSI class
- End Connection
- Body Material
- Trim Material
- Disassembling/Stripping
All valves shall be disassembled to execute repair effectively.
- Cleaning
Sandblasting, glass bead blasting for stainless steel or washing solvent.
- Repairing & Machining
- Removing Seat Rings
- Back Seating Surface
- Stem and Yoke Sleeve (Yoke Nut)
- Wedge Disc and Plug
- Seat Ring
- Flange Face and Ring Joint Grooves
- Bolting
- Gasketing
- Packing
- Testing
- Finishing
- Painting
- Tagging
- Packaging
- Shipping
Request for more information
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