SAMSON 3278 pneumatic rotary actuator

SAMSON 3278 pneumatic rotary actuator is a device designed for industrial applications, mainly used to drive rotary valves, such as butterfly valves, plug valves, etc. The following is a detailed introduction:

Working principle: The air pressure signal acts on the diaphragm surface to generate force, and the internal spring provides a reverse balancing force. This force interaction causes the actuator rod to produce a lifting motion, which is converted into a rotary motion through the lever system, thereby realizing the rotation of the valve to open or close.

Structural components: mainly include cover plate, diaphragm, actuator body, spring, actuator rod, lever system, actuator shaft, adjustment screw, manual wheel, vent plug, signal pressure interface, etc.

Performance parameters:

Torque: The maximum torque can reach 730Nm and the minimum torque is 4Nm.

Pressure range: The maximum air pressure is 6bar and the minimum is 0bar.

Rotation angle: The maximum rotation angle is 90°.

Diaphragm area: There are two specifications: 160cm² and 320cm².

Temperature range: The ambient temperature range is generally -35℃ to 90℃.

Weight: Approximately 16kg to 50kg.

Features and advantages:

Fail-safe function: It is a single-acting type with a spring return mechanism. The fail-safe action can be changed on site. By changing the connection between the spring and the actuator, it can achieve "power-off open" or "power-off close".

High precision: The rolling diaphragm provides higher precision and lower hysteresis compared to the tensile diaphragm.

Easy to adjust: The external travel limit can be easily adjusted to prevent excessive rotation of the valve, and the control valve accessories can be directly connected with only one external pneumatic connection.

Structural optimization: Multi-spring actuators can provide uniform application force while reducing the height and weight of the actuator.

Installation and operation: Follow the manual instructions during installation to ensure that the connection meets safety standards. During operation, the valve switch is controlled by adjusting the signal pressure. The valve position indication or monitoring system can be observed to ensure that the valve action meets the process requirements.