Flowserve APEX W7000 Pneumatic Positioner - Manual (Page 5)

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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.
Spool Valve Installation:
To change out or inspect spool valve, air supply to the positioner must be removed.
To remove spool valve:
1. Remove screw (1).
2. Carefully lift out entire spool valve assembly (2), disengaging spool (3) from balance arm (5).
To maintain highest performance, do not mix spool and block. Do not lubricate valve.
To Install new spool valve:
1. Check that O-rings are in place.
2. Insert spool valve assembly (2), making sure that the leaf spring (4) and balance arm (5) engage the slot in spool
(6).
3. Tighten screw (1).
4. Check for smooth operation of assembly.
I-P Installation:
All I-O modules are factory calibrated an cannot be adjusted. Kits are available to allow easy field installation of
various input options. Kits include modules, mounting hardware, fasteners, and O-rings.
1. Disconnect signal and supply air from positioner.
2. Remove Plug (1) from positioner housing.
3. Make sure O-rings (2) are seated correctly in I-P housing.
4. For weatherproof or intrinsically-safe I-P module, remove cover (4) to allow access to third mounting screw (5).
5. Attach I-P module (3) to positioner housing with three mounting screws (5) provided.