Series 670
INSTALLATION
943070EA
Edition 2018-06-19
15/39
4.3
Tightening torque
NOTICE
Physical overstraining at valve flange.
Physical overstraining may cause in damage of valve flange.
Do force (fasten) the screws more as specified by the screw manufacturer.
4.4
Admissible forces
Forces from evacuating the system, from the weight of other components, and from
baking can lead to deformation and malfunctioning of the valve. Stress has to be
relieved by suitable means, e.g. bellows sections.
Axial tensile or
compressive force
«F
A
»
Bending mo ment «M»
N
lb.
Nm
lbf.
4000
880
160
120
For a combination of both forces (F
A
and M) the values are invalid.
Verify that the depth of the mounting screws is min. 1x thread diameter.
Please contact VAT for more information.
M
F
A
