Maintenance & Repairs; Replacement Of Seals - VAT 264 Series Installation, Operating, & Maintenance Instructions

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 – . . . . . .
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.
5.1

Replacement of Seals

The item numbers in brackets refer to the drawing on page 9
•
Remove power connector and signal connector
•
Remove screw 27, coil assembly 26 and O-Ring 18
•
Remove 4 bonnet screws, remove bonnet flange 16
•
Withdraw axial conduit 17 with first O-Ring 62
•
Withdraw complete valve insert from body
•
Remove second O-ring 62
•
Stick a needle into the O-ring 61 and pull it out of groove
Attention: Do not damage the sealing surface!
•
Clean all sealing surfaces and contaminated parts
•
Put new O-ring 61 on plate groove and press it crosswise into groove at 4 points
•
Press O-ring 61 uniformly into groove
•
Put new bonnet seal (O-ring, 62) into body
•
Insert complete valve insert with bellows into body.
•
Insert O-Ring 62 and axial conduit 17
•
Insert bonnet flange 16 carefully. Do not cant!
•
Fasten 4 bonnet screws uniformly and crosswise in 2 to 3 steps
•
Attach O-Ring 18 and coil assembly 26
•
Fasten screw 27
•
Attach power connector and signal connector.
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
Installation, Operating & Maintenance Instructions
Series 264, DN 10 - 16 (I.D. 3/8 - 5/8")
. .
Fabrication number
279114EC
8/10
2010-10-06