Cam installation, Correct incorrect – Flowserve APEX 4000 Pneumatic Positioner User Manual
Page 3
© 2003, Flowserve Corporation, Printed in USA
3-Position Control/Dribble Control
SR Limit Switch Method
Automax Valve Automation Systems
Installation, Operation and Maintenance Instructions
AXAIMO36-00 (AUTO-112)
07/03
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 8611
Phone: 931 432 4021
Cam Installation:
Introduction: The standard cam (labeled "K1") features
linear, 90 degree operation for full 3-15 psi input, 3-9
and 9-15 psi split ranges, and 3-15 psi 180 degree
operation. The factory setting is 3-15 psi, 90 degrees,
with “D” (direct) side up for full clockwise position at
3 psi for 90
° operation.
Caution:
Be sure supply air pressure is removed and no
pressure exists in actuator before adjusting cam.
Cam Adjustment:
1.
Remove cover and indicator.
2.
Loosen the camlock screw (1) and turn the cam
locking nut (2) counterclockwise until the cam is
loose. It may be necessary to brace the output shaft
while loosening the cam locking nut.
3.
Adjust the cam (3) as desired, making sure that the
cam follower (4) always rides on an active lobe on
the cam.
4.
Secure the cam by finger tightening the cam locking
nut (2), and then tighten the camlock screw (1)
(see below).
Figure below shows cam setting for Direct Action
increasing signal 0-100% (20-100 kPa, 3-15 psi)
to open. Cam follower to ride on lobe D, 0-100%.
Figure below shows cam setting for reverse action,
decreasing signal 100-0% (100-20 kPa, 15-3 psi) to open.
Flip cam over, cam follower to ride on lobe R, 0-100%.
Split Range lobe is used to achieve high resolution in split
range applications, where only a portion of the signal is
used to obtain 90 degrees valve travel. For example, to
operate 0 to 90 degrees rotation with 0-50% input signal
(20-60 kPa, 3-9 psi), adjust cam follower to ride on Split
Range 0-50% lobe D. Note:
To obtain reverse action, flip
cam over and use lobe R.
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