Maintenance, Repair And Cleaning - WIKA IV10 Operating Instructions Manual

7. Maintenance, repair and cleaning

7. Maintenance, repair and cleaning
7.1 Maintenance
When used properly, the valves work maintenance-free. They must be
checked within the context of regular maintenance.
Inspection interval
Depending on the process, the ambient conditions and the number of
operations, the required inspection interval may vary from daily to several
weeks.
Recommended inspection interval: ≤ 3 months
Inspection checklist
1. Leak test of the process and instrument connections
2. Leak test between bonnet and valve body
3. Functional test for correct opening and closing
In case the leak test of item 2 fails, proceed with the adjustment of the
sealing packing described below.
7.2 Repair
Adjustment of the sealing packing
This adjustment is required when a leak can be detected at the valve
spindle, directly below the handle, or when during operation there is no
torque or resistance when turning the handle.
1. Loosen the counter nut
2. Increase the packing compression through the gland nut applying a
torque of ≥13 ... ≤ 18 Nm (18 ... 25 lbs ft)
3. Fix the gland nut with the counter nut
If after the adjustment of the sealing packing the leakage problem
persists, the packing must be returned for repair.
Perfect functioning of the product can only be guaranteed
when original accessories and spare parts are used.
WIKA operating instructions, shut-off valves and valve manifolds
EN
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