Combination ball valves can be customized
The structure and principle of pneumatic actuators
by：AIRWOLF
2021-01-15
Structure and principle of pneumatic actuators
actuator is a kind of control structure, cooperate with other structure which can realize the purpose of automatic control, according to its energy form can be divided into three types of pneumatic, electric, hydraulic, three types of each have each characteristic, can apply to different environments and situations. The pneumatic actuator is one of the common. Pneumatic actuators is energy comes from the gas, it can also be divided into two types of single and double action. The closing of the dual role of are driven by gas energy, single-acting switch is action of the open action gas drive, and closed by spring return.
pneumatic actuators actuators and adjusting structure is a unified whole, the actuator has a diaphragm, the piston, the fork type, gear, etc. Also, the various forms of suitable for different occasions with the environment, for example, the formation of the piston is longer, apply to a greater thrust required. Contrary to the formation of the diaphragm is small, can directly drive the stem, fork type torque is bigger, the space is little, the torque curve more accord with the valve torque curve characteristics of faults is not beautiful, so commonly used in large torque on the valve. Gear rack type pneumatic actuator structure is simple, accurate, smooth operation and safe explosion-proof, in power plant, chemical industry, oil refining, such as requiring high safety coefficient.
whether pneumatic, hydraulic, electric actuator principle is the same, just different energy. Such as pneumatic actuator, it is at work have gas to push the piston to the ends of movement to open the valve control, decrease when the gas pressure is not enough to push the piston when it will automatically shut down. Liquid, electric implement principle is the same, the liquid type and according to the pressure of the liquid to control switch. Electric is to rely on the power to drive it, and the installation of electric up more troublesome, in some special occasions to consider its insulation.
actuator is a kind of control structure, cooperate with other structure which can realize the purpose of automatic control, according to its energy form can be divided into three types of pneumatic, electric, hydraulic, three types of each have each characteristic, can apply to different environments and situations. The pneumatic actuator is one of the common. Pneumatic actuators is energy comes from the gas, it can also be divided into two types of single and double action. The closing of the dual role of are driven by gas energy, single-acting switch is action of the open action gas drive, and closed by spring return.
pneumatic actuators actuators and adjusting structure is a unified whole, the actuator has a diaphragm, the piston, the fork type, gear, etc. Also, the various forms of suitable for different occasions with the environment, for example, the formation of the piston is longer, apply to a greater thrust required. Contrary to the formation of the diaphragm is small, can directly drive the stem, fork type torque is bigger, the space is little, the torque curve more accord with the valve torque curve characteristics of faults is not beautiful, so commonly used in large torque on the valve. Gear rack type pneumatic actuator structure is simple, accurate, smooth operation and safe explosion-proof, in power plant, chemical industry, oil refining, such as requiring high safety coefficient.
whether pneumatic, hydraulic, electric actuator principle is the same, just different energy. Such as pneumatic actuator, it is at work have gas to push the piston to the ends of movement to open the valve control, decrease when the gas pressure is not enough to push the piston when it will automatically shut down. Liquid, electric implement principle is the same, the liquid type and according to the pressure of the liquid to control switch. Electric is to rely on the power to drive it, and the installation of electric up more troublesome, in some special occasions to consider its insulation.
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