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Manual two-way plug valve, also known as a manual knife gate valve, is a widely used control device in various industries. Its core feature lies in the tight and reliable contact between the gate and the valve seat, achieving a sealing effect. The manual two-way plug valve is mainly used in pipeline systems where the medium can flow in both directions, suitable for controlling the flow or throughput of powders, granular materials, and small particle materials, often used in conjunction with unloaders.

Operating Principle

Manual bidirectional plug valves are operated manually to open and close the valve. They operate by having a movable gate within the valve body, which features a circular or square opening that matches the pipeline diameter. Manual operation causes the circular or square opening on the gate to either completely disengage or align with the valve seat, thereby opening or closing the valve. This tight-sealing method ensures excellent sealing performance when the valve is closed, effectively preventing medium leakage.

Structural Features

The manual bidirectional plug valve features a simple and compact structure, reasonable design, and reliable sealing. It is primarily composed of components such as the frame, gate plate, screw, nut, and handwheel. As the handwheel is turned, the screw drives the nut and gate plate to reciprocate horizontally, achieving the purpose of opening and closing the valve. It is small in size, with a smooth channel design, ensuring the medium passes through the pipeline unobstructed, reducing fluid resistance, and lowering energy consumption.

Application Scenario

Manually operated two-way plate valves are widely used in industries such as metallurgy, mining, building materials, and grain, among others. For instance, in the metallurgy industry, they are commonly used in flue gas purification system pipelines for flue gas regulation and switching; in the building materials industry, they are used to control the flow or conveying amount of powdered, granular, and small particle materials. Due to their simple structure, easy maintenance, and low cost, manually operated two-way plate valves play an indispensable role in these industries.