Maintenance Procedures - VAT 616 Series Installation, Operating, & Maintenance Instructions

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»
VAT can give the following recommendations for preventive maintenance:
Replacement of
Rotary
feedthrough seals
Plate O-ring /
Plate vulcanized
Plate O-ring /
Plate vulcanized
DN 63 - 100 mm
ISO K (DN 40-50)
114/144
MAINTENANCE
Required frequency of cleaning and replacement of seals is depending on process
conditions.
1)
unheated
2'000'000 cycles
250'000 closing /
opening
100'000 closing /
opening
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.
Below pictures are sample pictures. Although there may be different variants of the
valve, the assembly procedure stays the same for all these variants with the
differences shown in the table below.
ISO_F (DN 63-100)
Edition 10.08.2022
heated ≤ 80 °C
6 months but
max. 2'000'000 cycles
6 months but
max. 250'000 cycles
6 months but
max. 100'000 cycles
Plate with O-ring
Series 616
1)
heated > 80 °C
3 months but
max. 2'000'000 cycles
3 months but
max. 250'000 cycles
3 months but
max. 100'000 cycles
Plate vulcanized
1143687EA
1)