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A Simple Guide To Of Gate Valve

Views: 8     Author: Site Editor     Publish Time: 2022-12-01      Origin: Site


What are Gate Valves Used for?

Most types of gate valve can be thought of simply as a gate valve or control valve for water supply. Gate valves are used for starting or stopping the flow of liquid (or steam/gas) through a section of pipeline, allowing that section to be completely shut off and isolated when necessary.

They are among the most common sorts of valves and taps you will find in most pipeline applications, and are used in a wide range of industrial settings. These might typically include:


--Oil and gas extraction

--Processing plants and water treatment facilities

--Various types of factories and production environments

--Medical and laboratory uses

--Food production and catering

--Automotive and mechanical

--Marine and offshore uses


Certain types of gate valve are often suitable choices for both high pressure and high temperature applications. Although quite a simple sort of valve in principle, they are highly effective when used in the right circumstances. Being fire-safe also means they are a suitable choice for high pressure-temperature scenarios.


Unlike some other types of Globe Valve (such as gate valve), a gate valve is only intended to be used in its fully open or fully closed state. Leaving it in a partially raised or lowered position will not have much effect on controlling the flow rate of the medium in the pipe, and may risk moving or damaging the valve due to excessive vibration.


A Simple Guide To Of Gate Valve

What are Gate Valves Used for


Gate Valve Styles

From the outside, most gate valve look somewhat similar. However, inside there are a host of different design possibilities. Most gate valves consist of a body and bonnet that contains a closure element, called a disc or a gate. The closure element is attached to a stem that passes through the bonnet of the valve, ultimately interfacing with a handwheel or other actuation device to operate the stem. Pressure around the stem is contained with a packing material that is compressed into a packing area or chamber.

gate valve generally have a low total cost of ownership. They are relatively easy to manufacture and are easy to repair.


The motion of a gate valve’s disc upon the stem dictates whether the stem rises during opening or threads into the disc. This reaction also defines the two major stem/disc styles of the gate valve: the rising stem or the non-rising stem (NRS). The rising stem is the overwhelmingly popular style of stem/disc design for the industrial market, while the non-rising style has merited longtime favor with the waterworks and plumbing industry segments. Some marine applications where gate valve are still used and space is tight, also utilize the NRS style.


The most common stem/bonnet design in use on industrial valve is the outside screw and yoke (OS&Y). The OS&Y design is preferred for corrosive environments because the threads are outside the fluid containment area. It also differs from other designs in that the handwheel is attached to a bushing at the top of the valve yoke, and not to the stem itself, thus the handwheel does not rise as the valve is opened.



Gate Valve Diagram

This is a cut-out diagram showing typical parts of a gate valve, giving you a visual indication of its basic components, stem design and function. Key parts such as the bonnet, stem, seal rings and valve body are labelled for clearer identification.


Gate Valve Diagram

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