‌Manual Circular Plug Valve, also known as a Manual Knife Gate Valve, is a valve where the gate and seat are always in tight contact for sealing. It operates by manually manipulating the gate to either completely disengage or align with the valve seat's bore, thereby opening or closing the valve.‌

Structural Features

The manual circular plug valve structure includes a frame, gate plate, screw, nut, handwheel, and other components. It features a compact design, small size, easy installation, and is suitable for various operating conditions. The valve body is equipped with a movable gate plate, which has a round opening matching the pipeline diameter, and the opening and closing is achieved through manual operation.

Application Scenarios

Manual circular plug valves are widely used in industries such as metallurgy, mining, construction materials, and grain. They are commonly paired with卸料器 (unloader) for controlling the flow or输送量 (transmission amount) of powdered, granular, particle, and small piece materials. Additionally, manual circular plug valves are suitable for transportation pipelines containing solid and dusty materials.

Pros and Cons

‌Advantages:

Simple Structure: Components are designed compactly, fitting closely together for easy installation.

Ease of Maintenance: Lightweight for easy transportation and installation, reducing installation costs and labor input.

Sealed Reliably: The gate and valve seat are in tight contact, ensuring excellent sealing performance and preventing medium leakage.

Wide Application Range: Suitable for various working conditions and media, such as high temperatures or corrosive media.

‌Drawbacks:

Manual Operation: Requires human intervention; not suitable for frequent or remote control applications.