400 Pneumatic Insert Plate Valve Dust Collector Accessories Manual Square Valve

The manual square valve and electric plug valve are key equipment for controlling material transportation in industrial pipeline systems. Their sealing performance directly determines the stability and material loss rate of pipeline transportation. This device adopts a dual structure of "rigid seal+flexible seal", combined with precise control of electric actuators, to achieve tight barrier of particles, powders and other materials, effectively avoiding material leakage and gas leakage problems. The abstract will briefly explain the sealing principle of the electric plug valve and the functional characteristics of the core sealing components (such as sealing rings and gate plates)

　　400 Pneumatic Insert Plate Valve Dust Collector Accessories Manual Square Valve

Electric plug valve is the core control equipment of pipeline systems in chemical, building materials, grain processing, environmental protection and other fields. It is mainly used to cut off or regulate the transportation of granular and powdery materials. Its core value lies in reliable sealing performance to prevent waste and environmental pollution caused by material leakage, while ensuring the stable operation of pipeline systems. To understand the efficient sealing mechanism of electric plug valves, it is necessary to start with their sealing structure design and working principle, combined with scientific daily maintenance methods, in order to ensure that the electric plug valves maintain good sealing effect for a long time and avoid production being affected by sealing failure.

Firstly, the sealing system of the electric plug valve consists of a rigid sealing component and a flexible sealing component, forming a dual sealing guarantee. The core sealing structure of an electric plug valve includes components such as a gate plate, sealing ring, and valve seat. The gate plate is a key moving part for achieving sealing, usually made of high-strength materials such as wear-resistant cast iron and stainless steel. The surface is precision machined to ensure flatness and hardness, reducing wear during long-term use. As a flexible sealing core, sealing rings are often made of elastic materials such as nitrile rubber and fluororubber. The appropriate material should be selected based on the characteristics of the conveyed material, such as corrosiveness and temperature. For example, when conveying corrosive materials, acid and alkali resistant fluororubber sealing rings should be used; When transporting high-temperature materials, it is necessary to choose high-temperature resistant silicone rubber sealing rings. When the electric plug valve is running, the electric actuator receives the control signal and drives the gate to move up and down along the valve seat guide rail. When it is closed, the gate is pressed down to the valve seat, and the sealing ring is compressed and deformed, tightly fitting the gap between the gate and the valve seat, achieving flexible sealing; At the same time, the rigid structure of the gate and the precise fit of the valve seat further block the material leakage channel, forming a rigid seal supplement. This "rigid+flexible" dual sealing design enables the electric plug valve to adapt to the conveying needs of different materials, with a sealing efficiency of over 99%, effectively solving the problem of poor sealing of traditional manual plug valves.

Secondly, the sealing performance of electric plug-in valves cannot be maintained without standardized daily maintenance, among which the inspection and replacement of seals and calibration of electric actuators are the core links. During use, the sealing ring of the electric plug valve will gradually wear out due to factors such as material friction and temperature changes. If not dealt with in a timely manner, it will lead to an increase in sealing gap and leakage of materials. Therefore, users need to regularly check the wear of the sealing ring: for electric plug valves that transport materials with strong wear (such as mineral powder and cement), it is recommended to check the sealing ring once a week to see if there are scratches, deformation, aging, and other problems; For equipment that transports corrosive or high-temperature materials, the inspection cycle should be shortened to once every 3-5 days. When the wear of the sealing ring exceeds 1mm or obvious aging occurs, it should be replaced in a timely manner. When replacing, attention should be paid to selecting a sealing ring that matches the prototype number. Before installation, clean the material residue on the valve seat and gate surface to ensure that the sealing surface is clean and avoid impurities affecting the sealing effect. In addition, the wear of the gate and seat of the electric plug valve can also affect the sealing performance. It is necessary to regularly check the flatness of the gate surface. If there are serious scratches or dents, the gate should be ground, repaired or replaced to ensure a tight fit between the gate and seat.

The precise control of electric actuators is another key to ensuring the sealing effect of electric plug valves. The electric actuator drives the reduction mechanism through the driving motor to control the lifting height of the gate. If the actuator calibration is not accurate, it will cause the gate to not close properly or excessively squeeze the sealing ring - not closing properly will directly cause poor sealing, and excessive squeezing will accelerate the wear of the sealing ring and shorten its service life. Therefore, users need to calibrate the electric actuator monthly: first, disconnect the power supply, manually operate the actuator, and check whether the gate lifting is smooth and there is no jamming phenomenon; Then turn on the power and command the actuator to close through the control signal. Use a feeler gauge to check the gap between the gate and the valve seat, ensuring that the gap does not exceed 0.05mm. If the gap exceeds the standard, adjust the stroke limit switch of the actuator until the gate is closed in place and the sealing ring is evenly stressed. At the same time, it is necessary to regularly clean the dust and oil inside the electric actuator, check whether the motor wiring terminals are loose, ensure the stable operation of the actuator, and avoid the sealing failure of the electric plug valve caused by actuator failure.

　　400 Pneumatic Insert Plate Valve Dust Collector Accessories Manual Square Valve