Installation, Operating & Maintenance Instructions
Series 29, DN 25 - 50 (I.D. 1" - 2")
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
257676ED
2006-05-11
5/13
2 Installation
2.1 Unpacking
Before unpacking the valve, make sure that the packaging is in impeccable condition and the valve has not suffered
damage.
Note! The plastic packing material and/or protective covers may only be removed immediately before the valve is
mounted into the system. Unprotected sealing surfaces must be treated with care and kept clean.
2.2 Installation into the system
DN (nom. I.D.)
Axial tensile or
compressive force
«F
A
»
Torque moment
«M»
mm inch N lbf Nm
lbf
.
ft
25 1 70 16 3 2.2
40 1½ 100 22 6 4.5
50 2 150 34 11 8
A combination of both forces «F
A
» and «M» is prohibited. Please contact VAT.
2.3 Connections
2.3.1 Compressed air connection
Connect compressed air only when
- valve is installed into the system
- moving parts cannot be touched
The valve is closed by a spring when compressed air supply fails.
Connection: Internal thread M5 (Optional: R⅛" adapter or other plug connections)
Compressed air pressure (min. – max. overpressure)
DN 25: 4.5 – 7 bar / 65 – 100 psig
DN 40: 4.0 – 8 bar / 60 – 115 psig
DN 50: 4.0 – 8 bar / 60 – 115 psig
Use clean, dry or slightly oiled air only!
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