Installation, Operating & Maintenance Instructions
Series 75.2, DN 40 (I.D. 1 ½”)
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel ++41 81 771 61 61 Fax ++41 81 771 48 30 Email
www.vatvalve.com
207088EB
2005-04-28
9/12
4 Trouble
shooting
Failure Check Action
Valve does not close/open
Power available?
Check Power supply
Commpressed air available?
Check compressed air
connection/pressure
Leak at the gate
Correct compressed air pressure?
Check compressed air
connection/pressure
Clean
valve
seat
Clean gate seal
Replace
gate
seal
Leak at the valve body
Flange seal leaktight?
Check flange seal
Bonnet seal leaktight?
Check bonnet seal
Screws at bonnet tightened?
Check closing torque of bonnet srews
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
. .
752. . – . . . . – . . . . / . . . .
A – . . . . . .
Fabrication num ber
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.
