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
5/12
2.3 Connections
2.3.1 Compressed air connection
Connect compressed air only if
- valve has been installed into the vacuum system
- moving parts cannot be touched
Connect compressed air to p (internal thread R
1
/
8
“,
1
/
8
“ NPT for USA)
Compressed air pressure (min. - max. overpressure): 4.5 - 7 bar / 65 - 100 psi
Use only clean, dry or slightly lubricated air!
Commercially available water separators and filters have to be installed.
Compressed air pressure: See „Technical data“ and label attached to valve.
The air lines have to be flushed or even cleaned before they are connected to the valve.
Only clean compressed air may be used for flushing the air lines and for operating the valve.
To avoid malfunctions of the solenoid, we recommend to seal the thread of the compressed air inlet
with liquid plastic (e.g. Loctite) and not by means of Teflon ribbon or similar fibrous material.
