gate valve selection guide: types, features, applications.
INTRODUCTION:
Gate valves, commonly known as knife valves or slide valves, are linear motion valves that utilize a flat closure element which slides into the flow stream to achieve shut-off. Their design minimizes pressure drop during full opening, making them ideal for numerous applications, especially in scenarios involving slurries. A gate valve effectively maintains the flow direction and has a diameter equal to that of the pipe, which ensures minimal pressure loss when fully opened.
If you are looking for more details, kindly visit our website.
These valves are principally intended for either fully opened or closed services and are primarily installed as isolating valves in pipelines, rather than for flow control or regulation.
TYPES OF GATE VALVES:
Gate valves can be categorized into several types, including the following:
Parallel gate valves: These utilize a flat disc gate set between two parallel seats. Shut-off is achieved by the utilization of upstream pressure to seal against leakage. A preferred design by manufacturers often includes spring-energized elastomers for better seat sealing.
Knife valves, a specific variant of parallel gate valves, feature a sharp edge on their gates to cut through solids or slurries.
The through-conduit gate valves utilize a rectangular closure with a circular opening matching the valve's full-area flow passageway, allowing seamless flow interruption by lowering or raising the element.
Wedge-shaped gate valves: These use inclined seats alongside a slightly mismatched inclined gate, offering a superior shut-off capability. The split wedge design enhances flexibility which aids in reducing stickiness between sealing surfaces even when misaligned. These valves are optimal for handling corrosive liquids and non-condensing gases at standard temperatures.
' Solid wedges are favored for their simplicity and resilience, suitable for installation in any orientation and for various fluid types.
' Flexible wedge gate valves find common use in steam systems where the unique disc creation allows for improved adaptation to misalignment issues.
APPLICATIONS OF GATE VALVES:
Gate valves are extensively utilized in diverse industrial domains—including oil and gas, pharmaceuticals, automotive, manufacturing, and maritime sectors. Their standardized design makes them preferable for numerous operational settings.
These versatile valves can be applied in both above-ground and underground installations. Primarily, they function as isolating valves, designed for complete shut-off rather than flow control.
If you want to learn more, please visit our website solid.
In challenging environments like power plants, water treatment facilities, mining operations, and offshore applications, their robust design and functionality are invaluable.
FEATURES OF GATE VALVES:
The body of a gate valve encompasses all operational components and connects to the system through various mounting options. Selection of an appropriate mounting method relies on system characteristics and media type.
The bonnet, which houses the moving elements, can be detached from the body for maintenance work. The trim of the valve consists of essential functioning parts including the gate, stem, disc or wedge, and seat rings.
TO SUMMARIZE:
Choosing the appropriate size for a gate valve in relation to the system is crucial, particularly with rising stem valves. Ideally, these valves should be horizontally installed with the manual actuator positioned above for easier access during maintenance.
Pointing to their versatility and efficiency, gate valves represent a fundamental component in industrial contexts, supported by a range of global suppliers, including Fevisa—a renowned valve stockist in the UAE. Fevisa operates with Spanish manufacturers to provide effective valve solutions.
For more Flanged end gate valve information, please contact us for professional guidance.