a actuator valve automatic control requirement, its definition and installed on the valve of any facilities, for the signal response, using external sources of power needed to move the Industrial Valves to automatically. Appended to the throttle valve actuator, it has the ability to control signal, is called a control valve. , according to the actuator definition of pure manual controller is an actuator, but most people talk about term actuator to the valve, they refers to the power controller, actuator using external signal and power supply rather than human. Typical classification including actuator pneumatic actuators ( The diaphragm, words plug drum, blade, etc. ) , motor actuators and electric hydraulic actuators. Actuator system is a special actuator, it is usually installed on the manually operated Industrial Valves, and is used to drive - Off or throttling operation.

control loop consists of sensors, controllers and installed on the valve actuator, the actuator is a key element in the control loop. For control loop, process system of sensors, such as walking the sensor t or flow meter, installed downstream of the controller is used to measure the most special variables in a process. Sensor to the controller reported its data, data and technology of the controller to the actuator compares it to need reservation. If the measured value and book value is different, the controller to control valve actuators to send the right signals. Signal consists of the following three methods of - Sent: increase or reduce the air pressure, voltage change, increase or decrease the hydraulic pressure. After receiving the signal, actuator movement to change closed element position, until the controller is equal to the predetermined data measured data. Signal increase, decrease or stop, actuators, and then in the corresponding position controller.

not only has the ability to adjust to change actuator signals, and must have enough power to overcome the technological process of internal force, a force effect and friction in the valve itself. Today most of the working condition of the actuator you need to use the compressed air, nine over ten of the actuator is driven air. Air is the best motive medium, because it is a relatively cheap and can in almost all of the factory. It not only pollute the environment, and easy to control. Usually factory supply of compressed air pressure, the type is between 60 to 150 psi ( Between 4 ~ 10 bar) , it is enough to drive now adopts air drive actuator components. When the Industrial Valves must be overcome - An exceptionally high pressure or valve stroke must speed up, often use bottled nitrogen, the pressure can be up to 2200 psi ( 150条) 。 Not only can be used for high pressure nitrogen gas cylinders, it is relatively free of moisture and no particles and other debris. In conclusion, air driven actuators fault is due to the compressibility of the gas, may have lost some accuracy through the air. Other sources of power including power supply ( Alternating current (ac) and direct current) And hydraulic ( Small range of steam) 。 Although electric and electric hydraulic actuators than air driven actuators are expensive, but they have very good accuracy and operating under low temperature environment ability, The air line will be frozen by condensed water) , can be used to need to thrust out.

if the signal is respectively by power source is sent out, factory first choose pneumatic or electric signal. Before 1980, most receives the pneumatic actuator signal, the signal is a typical 3 ~ l5psi ( 0. 2~1bar) , the other 3 ~ 9 psi ( 0. 2 to 0. 6条) And 9 ~ 15 psi ( 0. 6 to 1. 0bar) Are also common. But as the electric air drive and precise control of digital control system, is advantageous to the electric signal, 4 ~ 20 ma, or 10 ~ 50 ma) Age has begun.

actuator has two kinds of one-way movement or two-way movement. One-way movement adopts the structure of the actuator is: power supply only role in executing agency barrier ( Piston, diaphragm, the choke, etc. ) - The other side of the side, and relatively, no power supply. On one side of a relative, increase spring to balance the unilateral action. Relative term is positive action actuator, it refers to the power function to make the valve stem elongation of actuators. But on the other - , reverse action refers to the actuator power supply shrink stem of actuators. Two-way movement actuator is - of the actuator - Term, it refers to the dynamic role in actuators, on both sides of the barrier to change any pressure on one side of the actuator, barrier to move up or down. Pneumatic two-way movement actuators are almost always need to use a locator to change to the above or below the pressure of the air chamber to the barrier.

is usually an actuator can be combined by the separation of the body parts, it means that the operation can be removed from the body without having to remove the body. On the other hand, without having to remove the actuator assembly body can operate.

The single most important quality you'll need as Shenzhen Mech Valve Trading Co., Ltd. is 'stick-to-it-iveness' or grit, a combination of perseverance, patience and adaptability.
Shenzhen Mech Valve Trading Co., Ltd. will accomplish this by exceeding the expectations of our customers while conserving resources and preserving the quality of the environment.
ductile iron gate valve is one of the best products sold in the market today.
Increasing consumer awareness and rising concern about improving resilient seal gate valve are driving the market of products.
A technology team created for insuring that flow control valve is produced with the finest materials and technologies.