Spring Return and Double Acting Air Operated Actuator
Spring Return and Double Acting Air Operated Actuator
Remotely and safely activate butterfly valves pneumatically with Civacon's Spring Return and Double Acting Air Operated Actuators. The safe, compact, rugged, long lasting versatile and economical actuator is a perfect solution for your dry bulk transportation needs.
Features & Benefits
- Remotely and safely activate butterfly valves pneumatically
- Safe, compact, rugged, long lasting, versatile and economical
- Double acting actuators can be converted to spring return by inserting a spring cartridge
Part Numbers and Drawings
Spring Return
- ST-75-SR5 Pneumatic Actuator, Spring Return for 2"-3" Valves
- ST-75-SR6 Pneumatic Actuator, Spring Return for 2"-3" Valves
- ST-105-SR5 Pneumatic Actuator, Spring Return for 2"-3" Valves
- ST-157-SR5 Pneumatic Actuator, Spring Return for 4" Valves
- ST-157-SR5P Air Operated Spring Return Actuator 5”-6” (Perpendicular)
- ST-157-SR6 Pneumatic Actuator, Spring Return for 4" Valves
- ST-237-SR5 Pneumatic Actuator, Spring Reurn for 5"-6" Valvest
- ST-237-SR5-P Air Operated Spring Return Actuator 5" -6" (Perpendicular)
- ST-331-SR5 Pneumatic Actuator, Spring Return for 6" Valves
- ST-U75-SR5 Pneumatic Actuator, Spring Return for 2"-3" Valves
- ST-U75-SR6 Pneumatic Actuator, Spring Return for 2"-3" Valves.
- ST-U105-SR5 Pneumatic Actuator, Spring Return for 2"-3" Valves
- ST-U157-SR5 Pneumatic Actuator, Spring Return for 4" Valves.
- ST-U406-SR5 Pneumatic Actuator, Spring Reurn for 5" - 6" Valvest
Double Acting
- ST-75-DA Pneumatic Actuator, Double Acting for 2"-4" Valves
- ST-105-DA Pneumatic Actuator, Double Acting for 4" -5" Valves
- ST-157-DA Pneumatic Actuator, Double Acting for 5"-6" Valves
- ST-237-DA Pneumatic Actuator, Double Acting for 6" Valves
- ST-331-DA Pneumatic Actuator, Double Acting for 6"-12" Valves
- ST-406-DA Pneumatic Actuator, Double Acting for 8" - 12" Valves
Animation: DryBulk Process
-
Actuator Cross Reference
-
Actuator Part Numbers
-
Actuator Stem Sleeve Adaptor Guide
Features & Benefits
- Remotely and safely activate butterfly valves pneumatically
- Safe, compact, rugged, long lasting, versatile and economical
- Double acting actuators can be converted to spring return by inserting a spring cartridge
Part Numbers and Drawings
Spring Return
- ST-75-SR5 Pneumatic Actuator, Spring Return for 2"-3" Valves
- ST-75-SR6 Pneumatic Actuator, Spring Return for 2"-3" Valves
- ST-105-SR5 Pneumatic Actuator, Spring Return for 2"-3" Valves
- ST-157-SR5 Pneumatic Actuator, Spring Return for 4" Valves
- ST-157-SR5P Air Operated Spring Return Actuator 5”-6” (Perpendicular)
- ST-157-SR6 Pneumatic Actuator, Spring Return for 4" Valves
- ST-237-SR5 Pneumatic Actuator, Spring Reurn for 5"-6" Valvest
- ST-237-SR5-P Air Operated Spring Return Actuator 5" -6" (Perpendicular)
- ST-331-SR5 Pneumatic Actuator, Spring Return for 6" Valves
- ST-U75-SR5 Pneumatic Actuator, Spring Return for 2"-3" Valves
- ST-U75-SR6 Pneumatic Actuator, Spring Return for 2"-3" Valves.
- ST-U105-SR5 Pneumatic Actuator, Spring Return for 2"-3" Valves
- ST-U157-SR5 Pneumatic Actuator, Spring Return for 4" Valves.
- ST-U406-SR5 Pneumatic Actuator, Spring Reurn for 5" - 6" Valvest
Double Acting
- ST-75-DA Pneumatic Actuator, Double Acting for 2"-4" Valves
- ST-105-DA Pneumatic Actuator, Double Acting for 4" -5" Valves
- ST-157-DA Pneumatic Actuator, Double Acting for 5"-6" Valves
- ST-237-DA Pneumatic Actuator, Double Acting for 6" Valves
- ST-331-DA Pneumatic Actuator, Double Acting for 6"-12" Valves
- ST-406-DA Pneumatic Actuator, Double Acting for 8" - 12" Valves
Animation: DryBulk Process
-
Actuator Cross Reference
-
Actuator Part Numbers
-
Actuator Stem Sleeve Adaptor Guide
Need help? Contact support.
Customer Support
Reach Out to Our Customer Support Team for Prompt Assistance and Answers to Any Questions or Concerns You May Have
Technical Support
Contact Us for Technical Support on Your Projects and Resolving Any Technical Issues You Encounter
Contact a Distributor
Locate a Nearby Distributor for Replacement Parts
Product Enquiry
Product Information request form to find the right solution
Need help? Contact support.
Customer Support
Reach Out to Our Customer Support Team for Prompt Assistance and Answers to Any Questions or Concerns You May Have
Technical Support
Contact Us for Technical Support on Your Projects and Resolving Any Technical Issues You Encounter
OPW CORPORATE HEADQUARTERS
9393 Princeton-Glendale Road
Hamilton, Ohio, USA 45011
Customer Service: 888-526-5657
Main Office: 513-870-3100
Copyright © 2026 OPW, A Dover Company, and its affiliated entities.