‌Umbrella Gear Dark Rod Knife Gate Valve is a knife gate valve that combines an umbrella gear drive mechanism with a dark rod design, featuring a unique structure and operating method.‌

Structural Composition

The伞齿轮暗杆刀闸阀is primarily composed of the following parts:

‌Body: Generally made of cast iron, cast steel, or stainless steel, ensuring smooth fluid passage. The ends of the body feature flanges or other connection methods for secure assembly.

‌Sluice Gate: Similar to a blade shape, it moves up and down within the valve body to control the flow or cutoff of fluids. The material of the sluice gate varies depending on the application, with common options including stainless steel and carbon steel.

‌Rim Gear Drive Mechanism: Comprising a rim gear and valve rod, driven manually, electrically, or pneumatically, it facilitates the up and down movement of the gate plate, offering easy operation and enabling remote control or automation.

Seals: Installed between the gate and valve body to prevent fluid leakage. Common sealing materials include rubber, polytetrafluoroethylene, etc.

Operating Principle

When it's time to open the valve, rotate the worm gear by operating the handle or a power source (such as electric or pneumatic), which drives the valve stem upward, allowing the gate to gradually move away from the sealing surface within the valve body, opening the fluid passage. Once the gate is fully open, the fluid can flow smoothly through the valve. The closing process is the reverse; the worm gear rotates in the opposite direction, the valve stem moves the gate downward, and the gate seals tightly against the sealing surface, cutting off the fluid passage and closing the valve.

Performance Features

Low fluid resistance: As the gate plate moves up and down vertically, the fluid path through the valve is more open, resulting in less fluid resistance and contributing to reduced energy loss in the pipeline system.

Easier Operation: Equipped with a worm gear drive mechanism, making the valve's opening and closing effortless.

Excellent sealing performance: Utilizes high-quality sealing materials and a rational sealing structure to effectively prevent fluid leakage.

Wide Application Range: Suitable for various industrial fields such as mining, metallurgy, chemical processing, wastewater treatment, papermaking, and food industries.

Application Fields

Sprocket gear dark rod knife gate valves are widely used in various industrial fields, particularly in mining, metallurgy, chemical industry, wastewater treatment, papermaking, food processing, and power plant ash removal, among others. For instance, they are used in coal selection, gangue and slag discharge in mining power plants; in wastewater treatment for handling waste water, sludge, debris, and clarified water with suspended particles; and in the papermaking industry for processing any concentration of pulp and mixture of pulp and water.