Installation, Operating & Maintenance Instructions
Series 284, DN 16, 25, 40, 63
(ID 5/8”, 1”, 1½”, 2½”)
Series 285, DN 16, 25, 40, 63
(ID 5/8”, 1”, 1½”, 2½”)
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 [email protected] www.vatvalve.com
268249EF
2011-07-14
6/8
4
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!
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.
4.1 Replacement of vacuum seals
The item numbers in brackets refer to the drawing on page 7
4.1.1 Dismantling of "actuator/plate assembly"
•
Untighten and remove screws (60) uniformly and crosswise
•
Carefully withdraw "actuator/plate assembly" from valve body
•
Remove bonnet seal (62) from groove
