Installation, Operating & Maintenance Instructions
Series 651 DN 320-400 (I.D. 12“ - 16”), 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
267736ED
2008-02-26
9/53
2.3.2 Mounting with O-ring in grooves
ISO-F
JIS
ASA-LP
ISO-F
JIS
ASA-LP
Valve size
max. tightening torque
(Nm)
max. tightening torque
(lbs . ft)
DN320 / 12“
(65150 - . . . . - . . . . )
65-70
65-70 80-90 48-52 48-52 59-67
DN350 / 14“
(65151 - . . . . - . . . . )
– 65-70 –
– 48-52 –
DN400 / 16“
(65152 - . . . . - . . . . )
65-70
115-120 230-240
48-52 85-89
170-178
hole depth (mm)
hole depth (inch)
DN320 / 12“
(65150 - . . . . - . . . . )
18 18 18
0.71
0.71
0.71
DN350 / 14“
(65151 - . . . . - . . . . )
– 18 – – 0.71 –
DN400 / 16“
(65152 - . . . . - . . . . )
20 25 25
0.79
0.98
0.98
Caution: Make sure that screws are not too long otherwise the valve body may be damaged.
Note: These torques are valid if depth of the mounting screws is min. 1 x thread diameter. Make sure that screws in use
are capable to withstand applied torques. Lubricate screws slightly.
2.4 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 moment «M»
Valve size
N
lb.
Nm
lbf.
DN320 / 12“
(65150 - . . . . - . . . . )
3000 660 120 90
DN350 / 14“
(65151 - . . . . - . . . . )
3500 770 140 105
DN400 / 16“
(65152 - . . . . - . . . . )
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. 1 x thread diameter.
Please contact VAT for more information.
F
A
M
