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
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2.3 Tightening
torque
Tighten mounting screws of the flanges uniformly in crosswise order. Observe the maximum torque levels in the following
table. Higher tightening torques deforms the valve body and may lead to malfunction of the valve.
2.3.1 Mounting with centering rings
ISO-F
ISO-F
Valve size
max. tightening torque
(Nm)
max. tightening torque
(lbs . ft)
DN320 / 12“
(65150 - . . . . - . . . . )
17-20 13-15
DN350 / 14“
(65151 - . . . . - . . . . )
–
–
DN400 / 16“
(65152 - . . . . - . . . . )
17-20 13-15
hole depth (mm)
hole depth (inch)
DN320 / 12“
(65150 - . . . . - . . . . )
18 0.71
DN350 / 14“
(65151 - . . . . - . . . . )
– –
DN400 / 16“
(65152 - . . . . - . . . . )
20 0.79
Caution: Make sure that screws are not too long otherwise the valve body may be damaged.
Note: Use slightly lubricated screws.
Refer to «Spare parts and accessories» for centering rings ordering numbers.