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Partial Rotary Valve Electric Actuator Accurate Control Of Media Flow
Sep 28, 2017

Partial Rotary Valve Electric Actuator in the selection, in addition to attention and valves and other components of the matching, but also consider the electric actuator control mode. Partial Rotary Valve Electric Actuator in the control mode, the common switch-type Partial Rotary Valve Electric Actuator and adjustable Partial Rotary Valve Electric Actuator two, the main difference is the valve switch control function is different.

1, switch type electric actuator

Switch-type Partial Rotary Valve Electric Actuator are also known as open-loop control type Partial Rotary Valve Electric Actuator, which perform only two functions when the valve is operated, that is, the valve can only be fully open or fully closed. Switch type Partial Rotary Valve Electric Actuator can not control the amplitude of the valve switch, it can not be precise control of the medium flow.

The construction of the switch-type electric actuator has two kinds of split structure and one structure. Separate structure of the switch-type electric actuator must be equipped with a control unit to complete the control operation, it is not easy to install the system as a whole, and the investment cost is larger, the failure rate is high, is not conducive to diagnosis and maintenance.

One type of electric actuator is the control unit and the electric actuator combination as a whole structure, do not need to follow the control unit to complete the operation of the valve. Integral Partial Rotary Valve Electric Actuator support remote control, as long as the electric actuator output control information, it can complete their own operational tasks.

2, adjustable type electric actuator

Adjustable Partial Rotary Valve Electric Actuator, also known as closed-loop control type Partial Rotary Valve Electric Actuator, this actuator in addition to the control function of the valve switch, but also on the valve to open the amount of precise control to achieve precise control of the flow of the media. Adjustable Partial Rotary Valve Electric Actuator in the form of work, divided into electric open-type Partial Rotary Valve Electric Actuator and electric type Partial Rotary Valve Electric Actuator.

Electric open-type Partial Rotary Valve Electric Actuator and electric-type Partial Rotary Valve Electric Actuator work control signals are different in the selection should determine the form of work of Partial Rotary Valve Electric Actuator, otherwise the control system is not suitable, and difficult to modify.

Adjustable type of electric actuator with loss of signal protection, when the actuator because of line failure or other reasons can not receive the signal, will control the valve itself to the development of the state, usually the valve fully open, fully closed or in place The

The electric actuator is an important part of the electric adjustment system. It receives the 4 ~ 20mADC signal from the output of the electric controller and converts it into the appropriate force or torque to manipulate the adjustment mechanism so as to continuously adjust the flow of fluid in the pipeline during the production process. Of course, the electric implementation can also adjust the production process of materials, energy, etc., in order to achieve automatic adjustment. The electric actuator is composed of two parts of an electric actuator and an adjustment mechanism, in which part of the control signal of the electric controller is converted into force or torque is called electric actuator; and various types of control valves or other similar effects The adjustment device is collectively referred to as the adjustment mechanism.

The electric actuator can also switch between the automatic operation of the control system and the manual operation through the electric manipulator. When the switch of the operator is tangent to the "manual" position, the power supply of the servo motor can be directly controlled by the positive and the anti-operation buttons of the operator to realize the forward / stop / reverse rotation of the output shaft. In addition, the handle can be rotated by the actuator, in the field on-site manual operation. Receiver 4 ~ 20mADC signal of the electric actuator, are two-phase asynchronous servo motor as the driving position of the servo, according to the use of different adjustment agencies, the output method has a straight trip, angular travel and multi-turn three types, The composition and working principle of the various electric actuating structures are identical, except that the reducer is different.