Actuation Options

 

Shut-off (or shutdown) valve actuation systems range from manual activated to fully automatic RPM sensed methods.

Envacon standard options include:

 

 
  • Manual via a "throttle type" pull cable: Operator must realize the over-speed and manually pull the 'T' handle of the cable assembly to actuate the AIR STOP valve.
     
  • Manual pneumatic: Operator must realize the over-speed and manually actuate a 3-way valve to actuate the AIR STOP valve.
     
  • Manual electric: Operator must realize the over-speed and manually actuate a switch to energize the solenoid actuator on the AIR STOP valve.
     
  • Manual electric over pneumatic: Operator must realize the over-speed and manually actuate a switch to energize the solenoid valve, which in turn allows pneumatic pressure to actuate the AIR STOP valve.
     
  • Automatic electric over pneumatic system: Similar to the manual electric over pneumatic above, the system also includes an over-speed module in parallel to the manual circuit. The module reads an electronic signal that is related to engine RPM (a magnetic pick-up is commonly used to read the passing flywheel teeth), and if a preset maximum RPM is exceeded, the system/module will automatically actuate the shut-off to shutdown the engine.
     
  • Automatic electronic electric system: Similar to the manual electric above, the system also includes an over-speed module in parallel to the manual circuit. The module reads an electronic signal that is related to engine RPM (a magnetic pick-up is commonly used to read the passing flywheel teeth), and if a preset maximum RPM is exceeded, the system/module will automatically actuate the shut-off to shutdown the engine.
     
  • ENVACON customer specific systems. ENVACON can design customer specific actuation systems. In addition to the above systems, ENVACON has also supplied hydraulic actuated, loss of pressure to close, and low pressure actuation systems.
     
  • For the highest level of safety, ENVACON recommends a fully automatic system be used.

Click Here For Printable Version

Telephone:
(780) 439-9743 | Fax: (780) 702-0478

9204-41 Avenue Edmonton Alberta Canada T6E 6R7 
E Mail: Envacon@Envacon.com

COPYRIGHT Envacon Inc. 2008