Samson 3277 Pneumatic Actuator with 3730-3 Process Controller | Size 1 | 120 cm | ANSI CL150 | 6.0 Bar / 90 PSI

What pressure, flow and temperature is it rated for?

This actuator is rated for a maximum air supply of 6.0 bar / 90 PSI and ANSI CL150 flange connection. Flow and temperature ratings are not specified in the listing; ask the seller for the actuator's stroke output force range and the controller's operating temperature limits, as these determine valve compatibility.

What gases is it compatible with, and has it been oxygen cleaned?

This is a pneumatic actuator that uses compressed air as its power source, not a device that contacts process gases directly—it positions the valve stem, while the valve body itself contains the process medium. The listing does not specify oxygen cleaning status. If you're controlling oxygen service valves, confirm whether the actuator interior has been cleaned and whether any lubricants used are oxygen-compatible.

What materials are the wetted parts?

Pneumatic actuators do not have wetted parts in the process sense—the process medium flows through the valve body, not the actuator. The actuator's internal surfaces contact only the instrument air supply. For the valve application you're planning, you'll need to verify the materials of the valve itself, not this actuator assembly.

What should I inspect before putting it into service?

The listing states this unit must be re-certified before use to ensure proper calibration and safe operation. Inspect diaphragm condition for cracks or hardening, check all air connections for leaks, verify the positioner feedback linkage moves freely without binding, and bench-test the controller's response across the full stroke range. Check the yoke and stem connector for wear or corrosion, confirm spring pack integrity if it's spring-return type, and verify air consumption at operating pressure matches the data sheet before coupling to your valve.