• Otis-Axelson Fail-Safe Pneumatic Actuator

    Our Otis-Axelson Pneumatic Actuator is designed for simplicity, easy maintenance and adaptability. Its modular design and few components improve field performance. This actuator is designed to close upon loss of control pressure (fail-safe). The actuator's nylon reinforced diaphragm has large piston area allowing for a low control pressure. The maximum control pressure is 150 psi.

    Due to its fail-safe design, the actuator is ideally suited for wellhead, flowline, header, pipeline system and casing relief blowdown valve applications. Actuators are available for API gate valve sizes from 1 13/16 in. through 12 in. and larger upon request. 


    Limit switches, valve position indicators, fusible and standard lockout caps, stem protectors, mechanical and hydraulic opening assemblies are also available.




    • Less Maintenance – The rolling diaphragm design eliminates moving o-ring seals, leading to longer seal life.
    • Proven reliability – API 6A, PR2 Appendix F qualified packing.
    • Lightweight – Easy to install and maintain. The unit can be redressed without special tools or external pressure sources.
    • Quick Disconnect – Actuator can be removed from the valve without use of special tools or external pressure source.
    • Large Diaphragm Area – Permits use of a low pressure air or gas control system. A relief valve on the cylinder acts to protect against damage to the diaphragm in case of excessive pressure increases.
    • Visual Open-Close Indication – Upper stem extension indicates gate position at a glance.