Installation, Operating, and Maintenance Instructions
Series 01, DN 16 - 50 (5/8" - 2")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 [email protected] www.vatvalve.com
271691EB
2009-03-09
9/15
4
Trouble shooting
Valve does not close/open:
Power available?
Compressed air available?
Solenoid defective?
Check voltage!
Check air pressure!
Leak at gate:
Clean valve seat and gate!
Replace gate if damaged!
Correct air pressure?
Leak at body:
Flanges leaktight?
Replace bonnet seal!
4.1
Global leak at bonnet seal after heating the valve!
Due to a possible settlement of screw and VATSEAL it could happen that after a heat up and cool down procedure the
bonnet seal becomes slight leaky. In this case please check the torque (see below) of bonnet screw (see page 13 item 15)
and tighten the screws if necessary with a torque wrench.
Remark:
Do tighten screws crosswise!
Necessary torque of screws is for DN16 -DN50; 10 Nm / 7.4 lbf
.
ft.
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.
