VAT 64 Series - Preventive Maintenance

Installation, Operating & Maintenance Instructions
Series 64, DN 63-400 (I.D. 2
1
/2" - 16")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 CH@vatvalve.com www.vatvalve.com
219034EM
2013-08-27
14/19
Products returned to VAT must be free of harmful substances such as e.g. toxical, caustic or microbiological ones. If
products are radioactively contaminated, fill in the VAT form «Contamination and Radiation Report» and send it with the
product. The form is available at VAT. The maximum values indicated in the form must not be exceeded.
5.1 Preventive maintenance
The numbers in brackets refer to the drawing on page 17.
Note! The process environment of your application (i.e. corrosive gases, deposition on parts inside valve body) may
suggest shorter preventive maintenance intervals than suggested below.
Baking of the valve is highly recommended for contaminating processes. VAT offers customized heater box for
series 64 valves.
For quick maintenance, VAT recommends to exchange the complete gate assembly in order to reduce the
downtime of the system.
Warning! DN 160 – 400: Never remove the striking plate (22) of the ball guidance (18)!
Recommended maintenance after every 100'000 cycles (after 50'000 cycles for DN 400)
Clean gate O-ring (or to replace it, if necessary), clean the inside surfaces
Inspect the bonnet seal and inspect ball bearings and crank bolt
Replace all parts witch are per process caused corrosion or material pollution (recommended spare parts kit 'C')
Recommended maintenance after every 200'000 cycles (after 100'000 cycles for DN 400)
Additional to the 100'000 cycles maintenance interval, VAT recommends to clean and lubricate the ball bearings (replace it,
if necessary), replace the locking balls, replace the crank bolt, inspect, clean and re-lubricate the ball guide plate (replace it
if the balls have seized in the bushings), inspect, clean and re-lubricate the feedthrough O-ring (replace it if necessary)
The following table refers to the procedures in the following chapter and the spare parts list on page 17.
Cycles *)
Procedures
Recommended spare parts kits
Every 100’000
1., 2., 3.
A, E
For individual items see spare parts list on page 8
Every 200’000
1., 2., 3., 4., 5., 6., 7.
B, C, E
For individual items see spare parts list on page 8
*) Definition of a cycle: Movement of the gate from open into closed or control position and back into open position