Wedge Gate Valves
Among the more popular varieties, wedge gate valves are utilised extensively in all pertinent industrial and plumbing pipeline configurations. The split wedge, flexible wedge, and solid wedge are examples of subtypes.
Plain wedge valves, also known as solid wedge gate valves, are typically the most used. They have considerable mechanical strength yet are frequently among the easiest and least expensive solutions. They can be used with almost any kind of fluid media. Their sturdy, one-piece design makes them particularly suitable for use in turbulent fluid flow pipelines.
The barrier or gate of a wedge valve is angled slightly away from the pressurised liquid’s flow route in the pipe. They are also known as tapered gates as a result. This angle creates a wedging force as the valve closes, and helps to make for a more reliable seal at higher fluid pressure ratings.
Split Gate Valves
The wedge disc of a split gate valve, also known as a split wedge gate valve, is composed of two solid sections that are secured together by a spacer or spring. It can now self-adjust to the seats, giving it more flexibility and facilitating the creation of a tighter seal with a lower chance of sticking or binding. They work especially well with corrosive liquids and non-condensing gases.
Parallel Gate Valves
Similar in function to a wedge gate valve, a parallel gate valve has two discs positioned at a 90-degree angle to the direction of fluid flow. This type of gate is also known as a parallel disc gate valve or parallel slide gate valve. In high-temperature applications, where the parallel design is less prone to cause thermal binding, they are typically regarded as safer.
Knife Gate Valves
One popular type of gate valve is the knife gate valve, which is mainly intended for usage with particularly viscous or thick fluids, like slurry or liquid used to convey powder. In order to make it easier for the discs in the knife gate valve model to cut and pass through thicker media while closing, one end of the discs is tapered, or sharpened, hence the name knife valves.
Flanged Gate Valves
A gate valve with a flanged body is one whose bonnet—the portion on top of the valve that links the handwheel assembly and provides access to the working parts of the valve—is attached to the valve body. As a result, they are often less suitable than specialised pressure sealing types, but more appropriate for applications involving higher pressures than bolted connections.
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