6
KEYSTONE
FIGURE 79 PNEUMATIC ACTUATOR
OPERATING AND MAINTENANCE INSTRUCTIONS
STANDARD SINGLE ACTING ACTUATOR ASSEMBLY - 79U/E MODELS 002S-036S
STANDARD DOUBLE ACTING ACTUATOR ASSEMBLY - 79U/E MODELS 002 - 036
Top view of Actuator
Closed position
(Pistons in)
Open position
(Pistons out)
Top view of Actuator
Closed position
(Pistons in)
Open position
(Pistons out)
Top view of Actuator
Closed position
(Pistons out)
Open position
(Pistons in)
FIGURE 5
NON-STANDARD (FAIL OPEN) SINGLE ACTING ACTUATOR ASSEMBLY - 79U/E MODELS 002S-036S
End cap
O-ring
Backing pad
Body
O-ring
Hex head screws
Lock washer
Piston
Direction of movement
End cap/spring hsg.
O-ring
Backing pad
Body
O-ring
Hex head screws
Lock washer
Piston
Direction of movement
End cap/spring hsg.
O-ring
O-ring
Body
Backing pad
Hex head screws
Lock washer
Piston
Direction of movement
FIGURE 6
FIGURE 7
