Flowserve APEX W7000 Pneumatic Positioner - Manual (Page 7)

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Filter Plug Replacement:
Caution: Do not operate the unit without filter and filter plug installed. Do not attempt to unscrew filter plug while
positioner is pressurized
.
Note: This filter is not designed to act as a permanent source of clean, dry air.
1. Remove air supply pressure from positioner.
2. Unscrew filter plug (1) and O-ring.
3. Remove filter (3) and inspect filter and filter compartment. If moisture is found, check upstream filters and oil-
water separators. Moisture can cause I-P failure.
4. Replace filter if necessary and reinstall.
Maintenance:
The Apex W7000 positioner is designed for long life and trouble-free operation. The following steps should be
followed every six months to assure proper operation.
1. Check air supply and associated filtration eq
uipment. See “Supply Air Requirements.”
2. Make sure arms, bearings, and adjustment screws move freely. Caution: Moving parts to check freedom with
supply pressure connected will cause rotation of cam. Be sure to keep fingers away from cam pinch points. If
parts do not move freely disassemble and lubricate with a light, instrument grade grease (Lubriplate MAG 1 or
equivalent).
3. Check for smooth operation of the spool valve. If it sticks or feels “gummy”, remove and clean both spool and
valve bore with solvent. Make sure both parts are clean and dry before reinstalling. Do NOT apply grease to
these parts.
4. Check for air leaks in air supply.
5. Refer to “Troubleshooting” sections if maintenance does not cure problem.