Single acting actuator:
Adjust the fully closed position: There is usually a limit bolt at the bottom or side of the pneumatic actuator to restrict the valve from closing in place. The rotating limit bolt can accurately adjust the closing angle of the valve.
Adjust the fully open position: Similarly, another limit bolt is used to adjust the fully open position of the valve. By adjusting the limit bolt, the opening and closing stroke of the valve can be ensured to meet the design requirements.
Double acting actuator:
The stroke adjustment principle of a double acting actuator is similar to that of a single acting actuator, which controls the fully open and fully closed positions of the actuator through two limit bolts.
Speed regulation:
Adjust the action speed of the actuator by adjusting the flow rate and pressure of the gas source. Common methods include adjusting pressure reducing valves and installing throttling valves.
Adjust pressure reducing valve: Control the air source pressure used by pneumatic actuators by adjusting the pressure reducing valve. If you want the actuator to act faster, increase the air source pressure; If slower movement is required, lower the air source pressure appropriately.
Using a throttle valve: A throttle valve installed at the inlet or outlet of the actuator can effectively control the flow velocity of gas, thereby affecting the action speed of the actuator. Adjusting the opening of the throttle valve can control the speed of gas flow in or out, making the actuator action smoother or faster.
Signal conditioning (for regulating actuators):
For pneumatic actuators with locators (adjustable actuators), the operation of the actuator can be controlled by adjusting the input signal.
Input signal adjustment: Adjust the signal received by the locator (such as 4-20mA current signal or 0.2-1.0 bar air pressure signal) to control the output stroke of the actuator or the opening of the valve.
Zero point and range adjustment: By adjusting the adjustment bolt or knob on the locator, ensure that the actuator is fully closed when receiving the minimum signal and fully opened when receiving the maximum signal.
Spring preload adjustment (single acting actuator):
For single acting pneumatic actuators, the initial position signal and operating characteristics of the actuator can be changed by adjusting the preload force of the spring. Adjusting the spring preload can affect the initial opening position and operational response of the actuator.
