Pasco - Pneumatic Actuator
Double Acting for valve open and close operation and Cycle Regulation.
Scotch Yoke System: a technical choice
Scotch Yoke 5° Off-Set
actuator converts the energy supplied to the pistons in a NON LINEAR variable torque: Ihe highest value corresponds to the start position, the lowest to the middle run phase while tor the closing torque increases up to an intermediate value.
Energy Saving System (A and B graph)
The two diagrams (to the left, double acting actuator; on the page 8. spring return actuator) show the torques development during the valve cycle.
- Rack & Pinion flat torque.
- Scotch Yoke torque.
- Represents the typical volve torque
The blue area determined by the difference between the areas defined by Rack & Pinion and Scotch Yoke diagrams shows the Motive Energy Saving. This can be easily verified comparing the compressed air consumption stated in our data table and any Rack & Pinion manufacturer.
BTV: Break Torque Valve, BTO: Break Torque Open S.F: Safety Factor