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

13/19

4

Trouble shooting

Failure

Check

Action

Valve does not close/open/control

Compressed air?

Electrical connection?

Differential pressure

Mechanical parts

blocked?

Check compressed air at solenoids

Is differential pressure < 30 mbar?

Do not operate valve, while differential pressure

is > 30 mbar. Equalize pressure first.

Is valve cable connected properly?

Mechanical parts blocked? (cleaning)

Leak at gate

Sealing surface gate

Gate

O-ring

Clean valve seat and gate!

Check surface of seat and O-ring

Change O-ring, if necessary

Leak at body

Leak check

Flange seals leaktight?

Bonnet seal leaktight?

Screws at bonnet tightened properly?

If you need any further information, please contact one of our service centers. You can find the addresses on our website:

http://www.vat.ch

5

Maintenance & repairs

Under clean operating conditions, the valve does not require any maintenance during the specified cycle life.

Contamination from the process may influence the function and requires more frequent maintenance.

Before carrying out any maintenance or repairs, please contact VAT. It has to be individually decided whether the

maintenance/repair can be performed by the customer or has to be carried out by VAT. The fabrication number on the

valve

made in Switzerland

Fabrication No.:

patented

. .

. . . . . – . . . . – . . . . / . . . .

A

– . . . . . .

Fabrication number

has always to be specified.

All supplies (e. g. compressed air, electrical power) must be disconnected for removal/installation of the valve from/into the

system and for maintenance work.

Even with disconnected supply, loaded springs and/or air cushions in cylinders can be potential hazards.

Keep fingers and objects away from the valve opening!