Gate Valves

Gate valves are a type of pipline valves designed to fully open or close the flow of the working medium in pipelines. They are widely used in various industries, such as water supply, heating, gas supply, oil refining, and energy.

Design

• Gate valve consists of a body, inside which there is a gate (wedge, parallel, or knife), moving perpendicular to the flow of the working medium.
• Gate is controlled by a spindle, which can be rising or non-rising.
• Gate moves up or down, opening or closing the passage for the medium.

Advantages

• Simple design.
• Minimal hydraulic resistance in the open position.
• Ability to be used in large-diameter pipelines.
• Versatility (suitable for various media and operating conditions).

Disadvantages

• Large construction height and weight.
• Slow operation (compared to ball valves or butterfly valves).

Classification of Gate Valves

1. By body type:

• Cast
• Forged
• Stamped
• Welded
• Combined

2. By gate type:

• Wedge (Gate has a wedge shape, ensuring tight shut-off of the flow.)
• Parallel (Gate consists of two parallel discs that press against the seats)

3. By stem type:

• Rising stem
• Non-rising stem

4. By mounting method:

• Flanged
• Threaded
• Clamp
• Welded

5. By body material:

• Cast iron
• Steel
• Stainless steel
• Aluminum
• Brass