Installation, Operating & Maintenance Instructions
Series 612 DN 63-250 (I.D. 2.5“ - 10”), RS485
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 [email protected] www.vatvalve.com
289857EA
2011-07-13
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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
Valve
size
max. tightening torque
(Nm)
max. tightening torque
(lbs . ft)
mm inch
ISO-F ISO-F
63 2½
8-10
6-8
80 3
8-10
6-8
100
4 8-10
6-8
160
6 13-15
9-11
200
8 13-15
9-11
250
10 13-15
9-11
Refer to «Spare parts and accessories» for centering rings ordering numbers.
2.3.2 Mounting with O-ring in grooves
Valve
size
max. tightening torque
(Nm)
max. tightening torque
(lbs . ft)
mm inch
ISO-F JIS ASA ISO-F JIS ASA
63
2½
20-23 35-40 35-40 15-17 26-30 26-30
80
3 20-23 35-40 35-40 15-17 26-30 26-30
100
4 20-23 35-40 35-40 15-17 26-30 26-30
160
6 40-45 35-40 35-40 30-35 26-30 26-30
200
8 40-45 65-70 80-90 30-35 48-52 59-67
250
10 40-45 65-70 80-90 30-35 48-52 59-67
Note: Make sure that screws in use are capable to withstand applied torques.
