‌Manual Extension Rod Knife Gate Valve‌ is a valve that controls the flow of fluids through manual operation, featuring light and flexible operation, compact size, smooth passage, low flow resistance, lightweight, easy installation and disassembly. This valve is suitable for working conditions with pressure ranging from 0.6MPa to 1.6MPa and a maximum temperature of ≤400℃.

Structural Features

The manual extended rod knife gate valve is composed of components such as the valve body, valve plate (gate plate), valve rod, seals, and transmission mechanism. Its design is rational, easy to install and maintain. The bottom of the valve plate features a knife-type oblique cut, allowing the valve plate to effectively cut off the medium when closed, particularly suitable for media containing fibrous, pulp, slag, and other soft materials.

Working Principle

The manual extension rod knife gate valve operates by vertically moving the gate to control the flow and cutoff of the medium. To close the valve, manually operate the drive unit (such as a handwheel) to move the valve rod downward, causing the gate to slide down the valve body's guide track until the sealing surface of the gate tightly fits against the valve seat, thereby cutting off the medium flow. Conversely, to open the valve, manually operate the drive unit to move the valve rod upward, lifting the gate away from the valve seat, allowing the medium to pass through.

Performance Features

‌Operation Easy: Simply manually operate the drive unit to open and close the valve.

Sealed Reliability: Sealing surfaces are typically made of metal or elastic materials, offering excellent sealing properties to prevent fluid leakage.

High wear resistance: Gate plates are typically made of wear-resistant materials and can operate for extended periods in media containing solid particles.

Cutting Function: The gate plate features a blade-like design, capable of cutting through fibers, pulp, and other debris within the medium, preventing valve clogging and ensuring the unobstructed flow of the pipeline.

Compact structure: Small in size, light in weight, easy to install and dismantle.

Application Scenarios

Manual extension rod knife gate valves are widely used in various fields such as potable water, wastewater, construction, petroleum, chemical industry, food, light industry, electricity, shipping, metallurgy, and energy systems. They excel particularly in cutting off or regulating pipelines containing solid particles or thickening mediums. For instance, in the papermaking industry, they adapt well to fibrous mediums, ensuring the continuity and stability of paper production; in the mining sector, they can be used for coal selection and slag removal in mines, effectively cutting off or directing slurry and tailings fluids.