9. INSPECTION | MAINTENANCE
Please note:
Subsequent mentions of descriptions and position numbers refer to
Chapter 3. Product overview / product description on page 10
Attention:
If damage to the WEH
®
Product or restrictions to its functionality are detect-
ed, measures as set out in
Chapter 11. Troubleshooting on page 26
Damaged or leaking WEH
®
Products must be sent to WEH for maintenance.
9�1
Safety instructions for inspection and maintenance
- The WEH
®
Product must be depressurized and dismantled for maintenance work.
Î
Check the WEH
®
Product for leakage after maintenance work. Please refer to
- For inspection purposes, it is not necessary for the WEH
®
Product to be dismantled,
but it must be depressurized.
Î
Only use original WEH
®
Spare parts. These are exactly suited to the intended applica-
tion and subject to strict quality controls.
Î
Do not damage sealing surfaces or sealing components.
Î
Before reassembling; check the components, threads and, if present, the sealing
surfaces for damage and contamination. Should you find any damage, replace the
WEH
®
Product or send it to WEH for maintenance. Stop using the WEH
®
Product
immediately.
Î
Assemble the WEH
®
Spare parts absolutely free of oil, grease and dust.
Î
Before each reassembly, clean the WEH
®
Product and the corresponding
components by blowing off with oil-free compressed air and remove any adhering
dirt using a damp, soft and lint-free cloth.
Do not use solvents. Use only clean water as cleaning agent.
Attention:
Only use oil-free compressed air to blow off the dirt.
Note:
Make sure that no cleaning agent enters the gas channel.
Î
Observe the specified tightening torques during maintenance.
Î
Apply pressure to the WEH
®
Product only once it has been connected to a test piece.
For leak tests, connect the WEH
®
Product to a closed test piece (see
).
Attention:
If you apply pressure to the WEH
®
Product without the test piece connected,
the WEH
®
Product may be damaged. Therefore always use a test piece.
MD-10320-L51-R1.0.0-03
Page 19
Operating instructions
AE
