Double Acting

PNEUMATIC ROTARY ACTUATOR

AP SERIES

DOUBLE ACTING ACTUATOR (DA) ISO 5211

PRINCIPLE OF OPERATION

COUNTER CLOCKWISE OUTPUT OPERATION IS ACHIEVED BY INSERTING PRESSURE INTO PORT ‘A’,TO FORCE THE PISTONS APART THUS ROTATING THE ACTUATOR PINIONCOUNTER CLOCKWISE, DURING THE OPERATION, AIR FROM THE OUTER CHAMBERS IS EXHAUSTED THROUGH PORT ‘B’ , CLOCKWISE OUTPUT OPERATION IS ACHIEVED BY RESERSE OF THE ABOVE AND INSERTING PRESSURE INTO PORT ‘B’.

DATA REQUIRED FOR ACTUATOR SIZING

1) VALVE TORQUE (MIN,25% SAFETY RECOMMENDED.

2) DOUBLE ACTING OR SPRING RETURN OPERATION

3) MINIMUM AVAILABLE OPERATING PRESSURE.

SELECTION OF DOUBLE ACTING ACTUATOR (DA)

DETERMINE THE REQUIRED VALVE TORQUE, THIS SHOULD INCLUDE 25% SAFETY MARGIN,AND THE MINIMUM OPERATING PRESSURE AVAILABLE, REFER TO THE PRESSURE/TORQUE TABLE AND SELECT THE MINIMUM PRESSURE COLUMN APPLICABLE,FOLLOW THIS COLUMN DOWN UNTIL A VALUE NOT LESS THAN THAT REQUIRED IS FOUND, NWXT READ ACROSS TO THE LEFT HAND COLUMN AND READ THE MODEL NUMBER TO BE ORDERED.

EXAMPLE: VALUE TORQUE 80 Nm PLUS 25% = 100Nm MIIMUMOPERATING PRESSURE 5 BAR, BY READING DOWN THE 5 BARCOLUMN A FIGURE WITHOUT BELOW 119 Nm IS 123 Nm THE MODEL NUMBER THEREFORE SHOWN IN THE LEFT HAND COLUMN IS “AP4DA”.

REMARK: THE CHOSEN TORQUE VALUE, WICH FIXES THE TYPE OF ACTUATOR, HAS NEVER TO BE LOWER THAN THE REQUESTED TORQUE VALUE OF THE VALVE.