Installation, Operating & Maintenance Instructions 
Series 650 DN 100-250 (I.D. 4“ - 10”), CC-Link 
 
 
 
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 
280672EB 
2010-12-15 
76/94 
 
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
. .
. . . . . – . . . . – . . . . / . . . .
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. 
 
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! 
 
 
Products returned to VAT must be free of harmful substances such as e.g. toxical, caustic or micro-biological 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.