VAT 612 Series - Defined Maintenance Procedures

Series 612 MAINTENANCE
605262EE Edition 2018-08-20 93/
116
7.2 Maintenance procedures
Two maintenance procedures are defined for this valve. This are:
• Replacement of shaft feedthrough seals and valve cleaning. Refer to chapter: «Replacement of
rotary feedthrough».
• Replacement of Option board. Refer to chapter: «Replacement of Option board»
Required frequency of cleaning and replacement of seals is depending on process
conditions.
VAT can give the following recommendations for preventive maintenance:
Replacement of unheated
1)
heated
≤
80 °C
1)
heated > 80 °C
1)
Rotary
feedthrough seals
2’000’000 cycles 6 months but
max. 2’000’000 cycles
3 months but
max. 2’000’000 cycles
1)
Those figures are reference values for clean conditions under various temperatures.
These values do not include any impact of the process. Therefore preventive
maintenance schedule has finally to be checked for the actual process conditions.