GLOBE VALVES AND ITS TYPES

Globe valves are most in-demand in various Industries. A common use of Gate Valve is to control the flow of fluid in a pipeline and adjust the Gaps between the Globe Shaped Plug and the Ring Seat. Globe Valve doesn’t leak much as Compared to other Valves because of the Right Contact between the Disc and the Ring. Globe Valve has a Disc-type element which is in a spherical body. The Disc available on a globe valve can be removed from a flow path.

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Globe Valves Advantages

·         Good shutoff capability

·         Easy to Repair

·         Faster Operations than Gate Valves

·         Moderate to good throttling capability

·         Shorter stroke

·         With disc not attached to the stem, Valves can be used as a stop-check valve

Globe Valves Disadvantages

·         Higher pressure drops.

·         Costlier than Gate Valves

·         Heavier than Other Valves

·         Requires greater force or a larger actuator to seat the Valves (with pressure under the seat)

·         Permanent air tightness against fiber and gases Resilient closure.

·         Throttling flow under the seat and shutoff flow over the seat

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Types of Globe Valves:

There are a variety of Valves available and is used according to its Requirements and Functions. All valves cannot be used for the same purpose, so here we are listing 2 Types of Globe Valves which are

A)     Angle Type Globe Valves

B)     Jacketed Type Globe Valves

Angle Globe Valves

An Angle Type Globe valve, different from other Valves, is a type of Valves used for regulating flow in a pipeline, consisting of a movable disk-type element and a stationary ring seat in a generally spherical body. An Angle Type Globe Valves is a linear motion Valves and is primarily designed to stop, start and regulate flow. The disk of an Angle Type Globe Valves can be totally removed from the flow path or it can completely close the flow path.

Angle Type Globe Valves Design

Angle Type Globe Valves are precisely designed to control flow. The range of flow control, pressure drop, and duty must be considered in the design of the Valves to avert premature failure and to assure satisfactory service. Valves subjected to high-differential pressure-throttling service require specially designed Valves trim. Generally, the maximum differential pressure across the Valves disc should not exceed 20 percent of the maximum upstream pressure or 200 psi (1380 kPa), whichever is less. Valves with special trim may be designed for applications exceeding these differential pressure limits.

Angle Type Globe Valves

Characteristics: OS &; Y Construction, Bolted Bonnet, Full Port or Reduced Bore.

Features: Integral Bonnet (Bonnet less), Floating Backseat, Bayonet Body/Yoke-Connection

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Jacket Globe Valves

A Valve Body which is Surrounded by a Jacket is Called Jacket Valve. Jacket Valve use depends on Flow Media, Temperature, Performance and Operation of Valve.  Body of a Jacket Valve can be welded from outside. Depends on the possibility of castings decide to go with fabricated or casted version Jacketed Valve.  Jacket Valves are mostly used in Chemical, Pharma, Petrochemical, Fertilizers and General Process Industries.

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