A Gate Valve and Its Advantages - Weidouli Valves Co.,Ltd.

A gate valve is a wedge disc used for opening and closing fluid flow. The disc moves perpendicularly to the fluid's direction, allowing the valve to be either fully open or fully closed but not adjusted or throttled. The valve's sealing is achieved through the contact between the valve seat and the gate, typically enhanced by sealing and welding the metal material to improve wear resistance. Gate valves find extensive applications in chemical, petroleum, light industry, hospitals, and environmental protection sectors.

If you are looking for more details, kindly visit our website.

Ⅰ. How does a gate valve work

Gate valves operate using a wedge disc with two sealing surfaces. The common design forms a wedge where the wedge angle, usually 5° or 2°52' for medium temperatures, is dependent on valve specifications. The wedge disc can either be rigid or elastic. Rigid gates don't deform, while elastic gates slightly deform to enhance manufacturability and compensate for sealing surface deviations. Gate valves achieve sealing through medium pressure pushing the gate into the valve seat in a process called self-sealing. However, most gate valves use forced sealing.

Ⅱ. Advantages of gate valves

1. Minimal flow resistance: The internal channel is straight, ensuring low flow resistance.

2. Easy opening and closing: The gate valve's movement is perpendicular to the fluid flow, making it easier to operate compared to shut-off valves.

3. Long opening and closing time: The stroke of the gate is large and involves a screw-driven mechanism.

4. Low water hammer risk.

5. Symmetrical channel: Media can flow in either direction, simplifying installation.

6. Short structure length: The distance between connecting end faces is minimal.

7. Simple body design: Gate valves feature a straightforward structure, good manufacturability, and a broad range of applications.

8. The gate valve has a compact structure, good rigidity, small flow resistance, long sealing surfaces, reliable sealing, and easy operation.

Visit kairuite to know more.

Gate Valve, Type, Advantage and Disadvantage, Applications

Gate valves are widely used for all types of applications and are suitable for both above-ground and underground installations. Choosing the right valve type is essential for underground installations to avoid high replacement costs.

Gate valves are designed for fully open or fully closed service and should serve as isolating valves rather than control or regulating valves.

Operation is performed with a clockwise or counterclockwise rotating motion of the stem, moving the gate along the threaded part of the stem.

History of a gate valve

The term Gate Valve originated from old words meaning passage with a barrier. Ancient civilizations like the Egyptians, Greeks, and Romans used simple wooden barriers functioning similarly to modern gate valves. Significant advancements in the 19th century enhanced their industrial applications.

Type of Gate Valve

Different types of gate valves include:

• Standard
• Wedge Types
• Solid Tapered Wedge
• Solid Pliable Wedge
• Double Disc type
• Bellow Design
• Cryogenic Design
• Knife Plate
• Hulk Plate

Advantages of Gate Valves

• Excellent closing feature
• Bidirectional flow capability
• Laminar flow with minimal pressure loss

Disadvantages of Gate Valves

• Cannot be quickly operated
• Large space required for assembly and maintenance
• Slow movement in fully closed position can cause damage from friction
• Leakages in high-temperature change systems
• Repair and maintenance of seating surfaces are difficult

Application of Gate valve

• Socket or butt-welding end-gate valves in air, fuel gas, feedwater, steam, lube oil, and other systems
• Threaded-end gate valves in air, gaseous, or liquid systems
• Seal welding or thread sealants can address leakage concerns in threaded applications
• Flanged gate valves in low-pressure and low-temperature systems like fire protection or water distribution pipelines

The company is the world’s best gate valves manufacturer supplier. We are your one-stop-shop for all needs. Our highly specialized staff will help you find the product you need.