Installation, Operating & Maintenance Instructions
Series 612 DN 40-50 (I.D. 1.5“ - 2”), Logic
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 [email protected] www.vatvalve.com
289419EB
2011-12-12
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2.3 Tightening
torque
2.3.1 Mounting of ISO-KF flanges
Tightening torques for ISO-KF flange connections depends on the type of seal which is used. Follow recommendations of
seal manufacturer.
2.4 Admissible
forces
Forces from the weight of other components can lead to deformation of the valve body and to malfunction of the valve.
The stress has to be relieved by suitable means. The following forces are admissible:
Valve size
Axial tensile or
compressive force «F
A
»
Bending moment «M»
mm inch
N lb. Nm lbf.
40 1½
100
22
6
4.5
50 2
150
34
11
8
M
F
A
