Installation, Operating & Maintenance Instructions

Series 64, DN 63-400 (I.D. 21/2" - 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