Flowserve SuperNova Series - Manual (Page 2)

SuperNova Series
S050 - S200
Rack & Pinion AUTOMAX Actuators
Pag e 2/4
B00043e4-rev 3.doc
OPERATION
(As viewed from top of the actuator)
Double Acting
Applying air pressure to Port 2 drives the pistons outward,
which turns the pinion counterclockwise as the air volume on
the outside of the pistons exhausts through Port 1. Applying air pressure to Port 1 drives the pistons inward,
which turns the pinion clockwise as the air volume on the
inside of the pistons exhausts through Port 2.
Spring return (Fail CW)
Applying air pressure to Port 2 drives the pistons outward,
which compresses the springs and turns the pinion
counterclockwise as the air volume on the outside of the
pistons exhausts through Port 1. Exhausting the air pressure from Port 2 allows stored energy
of the springs to drive pistons inward, turning the pinion
clockwise. Air volume on outside of pistons vents through
Port 1.
Spring Return (Fail CCW)
Applying air pressure to Port 2 drives the pistons outward,
which compresses the springs and turns the pinion
clockwise as the air volume on the outside of the pistons
exhausts through Port 1. Exhausting the air pressure from port P2 allows stored
energy of the spring to drive pistons inward, turning the
pinion counterclockwise. Air volume on outside of pistons
vents through Port 1.
Changing direction of pinion rotation (CW to CCW)
The SuperNova series actuators are normally assembled
as Double Acting or Spring Return Fail CW (spring action
turns pinion clockwise).
To assembly the actuator on Spring Return Fail CCW
(spring action turns pinion counterclockwise):
1. Follow disassembly procedures (next page) from
point #1 through #8.
2. Rotate both pistons 180° around their axis: left
piston rack must be on air supply ports side, right
pinion on the opposite side (see Spring Return
CCW drawing).
3. Follow reassembly procedures.