Flowserve SNA250 - Manual (Page 2)

© 2005, Flowserve Corporation, Printed in USA
Automax Valve Automation Systems
Installation, Operation and Maintenance Instructions
Flowserve Corporation 1350 N. Mountain Springs Parkway 1978 Foreman Dr.
Flow Control Division Springville, Utah 84663-3004 Cookeville, TN 38501
www.flowserve.com Phone: 801 489 2233 Phone: 931 432 4021
FCD AXAIM0005-00 (LMR0014-1) (AUTO-5) 03/05 Page 2 of 4
Operation
(as viewed from top of actuator)
Double Acting
Applying air pressure to Port 1 drives the pistons Applying air pressure to Port 2 drives the pistons
outward, which turns the pinion counterclockwise as inward, which turns the pinion clockwise as the air
the air volume on the outside of the pistons exhausts volume on the inside of the pistons exhausts through
through Port 2. Port 1.
Spring Return (Fail CW)
Applying air pressure to Port 1 drives the pistons Exhausting the air pressure from Port 1 allows
outward, which compresses the springs and turns stored energy of the springs to drive pistons inward,
the pinion counterclockwise as the air volume on the turning the pinion clockwise. Air volume on outside
outside of the pistons exhausts through Port 2. of pistons vents through Port 2.
Spring Return (Fail CCW)
Applying air pressure to Port 1 drives the pistons Exhausting the air pressure from Port 1 allows stored
outward, which compresses the springs and turns energy of the springs to drive pistons inward, turning
the pinion clockwise as the air volume on the outside the pinion counterclockwise. Air volume on outside of
of the pistons exhausts through Port 2. pistons vents through Port 2.