Wuxi Xinming Automatic Control Valve Industry will introduce to you how we should judge the quality of pneumatic actuators.
Usually, when we choose a pneumatic actuator, we are more concerned about price and quality. If the price is right, we will want to know more about its quality. If it meets the requirements, we will choose to buy it. After all, a pneumatic actuator Whether the quality of the actuator is qualified or not determines whether the production is safe and whether it will cause hidden dangers, so how to judge the quality of the pneumatic actuator.
The first, and most important, is tightness. The sealing performance of a pneumatic actuator directly determines whether it will leak. The current pneumatic actuator seals are mainly hard seals and soft seals. have their own suitable medium. The second is action sensitivity and reliability, which refers to the sensitivity of the pneumatic actuator to respond to changes in medium parameters. For throttle valves, pressure reducing valves, regulating valves and other actuators used to adjust medium parameters, as well as safety valves, pigging valves and other pneumatic actuators with specific functions, their functional sensitivity and reliability are very important technical performances index.
The third is the opening and closing speed of the switch. The opening and closing speed is expressed by the time required for the actuator to complete an opening or closing action. Generally, there are no strict requirements on the opening and closing speed of pneumatic actuators, but some working conditions have special requirements on the opening and closing speed. Some require rapid opening or closing to prevent accidents, and some require slow closing to prevent water hammer. etc., which should be taken into account when choosing the actuator type. The fourth is the problem of medium circulation. The suitability of medium recirculation will affect the product pressure. Therefore, when designing a pneumatic actuator, it is necessary to reduce its resistance to the medium as much as possible. Pneumatic actuators are produced according to the high requirements of working conditions. In the future, it will be an era of major leadership. The appearance and structure of the pneumatic actuator not only meets the requirements of explosion-proof, but also small in size, light in weight and large in torque, because it adopts the transmission structure design of "single-cylinder double-piston-variable torque".
With the continuous increase of pneumatic actuators, pneumatic actuators have a very prominent performance. As a pneumatic actuator with a single-cylinder design, it is undoubtedly half the size of the double-cylinder design of a rack-and-pinion actuator. Secondly, when the pneumatic actuator is in operation, the output torque can change with the change of the angle, and when the valve is opened or closed, the torque value is large, which is exactly in line with the law of the valve. Compared with rack and pinion actuators, pneumatic actuators can save more torque because the torque of rack and pinion actuators is constant. The cylinder body is made of extruded aluminum alloy and is treated with hard anodizing. The inner surface is hard in texture, high in strength and hardness. The sliding bearing made of low-friction material avoids the direct contact between metals, has long service life, low friction coefficient and flexible rotation.
