Typical Pressure Seal Bonnet Gate Valves
This illustration represents a typical Kinka pressure seal bonnet gate valves. There will be some minor modifications in each class, type and size.
- Body with seal-welded seat rings which are hard faced with stellite.
- Bonnet with stellited integral backseat.
- Yoke is mounted directly on the body. In Type B design, sizes 4" and smaller have an integral yoke and gasket retainer which is screwed into the body to hold the gasket.
- Disc is flexible wedge type, and seat surface are hard faced with stellite.
- Stem
- Gasket Retainer is either a segmented ring (Type A) or one-piece threaded ring (Type B).
- Gasket
- Bonnet Bolts (Type A)
Bonnet Nut (Type B) - Gland is two-piece, ball type which exerts uniform pressure on the packing without binding the stem in the event that nuts are unevenly tightened.
- Gland Packing
- Anti-Friction Bearings are used on most valves.
- Handwheel or Bevel-Gear Type Valve Operator (not illustrated here)