Series 091
MAINTENANCE
1088779EA
Edition 19.05.2021
15/27
7
Maintenance
WARNING
Unqualified personnel
Inappropriate handling may cause serious injury or property damage.
Only qualified personnel are allowed to carry out the described work.
WARNING
Hazardous components
Human body parts may get jammed and severely injured.
Before starting maintenance:
– disconnect compressed air supply
– disconnect electrical power supply
WARNING
Movable parts
Human body parts may get jammed and severely injured.
Keep human body parts away from movable parts.
7.1
Maintenance intervals
Under clean operating conditions the valve does not require any maintenance during specified service
lifetime; see product data sheet. Contamination from the process may influence the function and
requires more frequent maintenance. After these cycles, VAT recommends to clean the gate seal or if
needed, replace the gate seal.
Recommendation under harsh process conditions:
Annual inspection and replacement of seal kit and bellows feed through to achieve
the highest possible safety level.
For more information or a general overhaul please contact one of our service centers. You will find the
addresses on our website www.vatvalve.com.
7.2
Required tools
•
Allen wrench
•
Screwdriver
•
Cleanroom wiper soaked with alcohol (2% methyl ethyl ketone)
•
O-Ring removal tool; see «Table 12-1» on page 26.
Ensure that the maintenance technician is familiar with the safety precautions which
relate to the product. Wear appropriate safety clothing when you come into contact
with contaminated components. Dismantle and clean contaminated components
inside a fume cupboard.
