Globe valve for power plant industries - ASKPOWERPLANT

Globe valve for power plant industries

Globe valve for power plant industries
BOILER MAINTENANCE

Globe valve for power plant industries:-

Globe Valve

Globe valves is a widely used in high pressure steam and water line. movement of disc parallel to flow of fluid .Globe valves A conical plug moves in and out of the fluid Can be used for shutoff as well as throttling (flow restriction to cause a drop in pressure) in high pressure drop and temperature applications Available in globe, angle, and y-patterns Manual operation or else multi-turn electric actuators are most common .Easier to repair but more pressure drop than a gate or plug valve.

Parts features of Globe valves:-

Yoke: Two arms design for rigidity and accessibility

Gland bolt: Eyebolt type for easy repacking

Gland and Gland flange: Self-aligning type

Expanded Graphite Seal Ring: Excellent seal performance at low and high Pressure, even under severe pressure and temperature transients

Back Seat: In case of packing leakage, tight backseat sealing achieved with less seating force due to the differential in mating angles between the stem shoulder and the hard faced bonnet backseat.

Stem: Smooth finish ensures seal and smooth operation; upper stem threaded by machine for toughness and increased durability.

Bonnet with cooling chamber: Increases the packing life and seal ability by maintaining packing at normal temperature.

Bonnet pressure seal part: Pressure seal design incorporates a graphite seal which become tighter as the pressure increases.

Disc: Improved seal performance under the high pressure and temperature by use of a plug type disc.

Seat ring: Renewable and easy to replace seat ring are seal welded to minimize distortion from body stress.

Seat surface: Hard faced seat ensures long service life, better resistance to heat, corrosion and erosion.

Features of  globe valve :-

  1. Globe valve uses body guided discs which are held concentric with body seat. Guiding is provided at full length of the disc to form a fully body-guided disc.
  2. Globe valve are suitable for “blow down” applications for a high differential pressure across the valve when it is partially opened.

Application of globe valve :-

-Super heater primary desalt

-Super heater Secondary desalt

-Super heater desalt main pipe

-Warm water pump pipeline

-Reheater desalt

-Separator outlet pipeline nitrogen charge

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