VAT 64 Series - Installation; Installation into the System; Connections; Tightening Torque for Mounting Screws on Flanges

Installation, Operating & Maintenance Instructions
Series 64, DN 63-400 (I.D. 2
1
/2" - 16")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 CH@vatvalve.com www.vatvalve.com
219034EM
2013-08-27
5/19
2 Installation
2.1 Installation into the system
The valve seat side is indicated by the symbol: on the connection flange.
2.2 Connections
2.2.1 Tightening torque for mounting screws on flanges
1. Mounting with centering ring
Tighten mounting screws of the flanges uniformly in crosswise order. Observe the maximum torque levels in the following
table. Higher tightening torques deform the valve body and can lead to an improper function of the valve.
DN
max. tightening torque
(Nm)
max. tightening torque
(lbs . ft)
mm
inch
ISO-F
JIS
ASA-LP
ISO-F
JIS
ASA-LP
63/100
4
8 – 10
8 – 10
8 – 10
6 – 8
6 – 8
6 – 8
160
6
13 – 15
13 – 15
20 – 30
9 – 11
9 – 11
15 – 22
200
8
13 – 15
13 – 15
20 – 30
9 – 11
9 – 11
15 – 22
250
10
17 – 20
17 – 20
40 – 60
13 – 15
13 – 15
30 – 44
320
350
12
14
17 – 20
17 – 20
40 – 60
13 – 15
13 – 15
30 – 44
400
16
17 – 20
30 – 35
55 – 80
13 – 15
22 – 26
41 – 59
2. Mounting with O-ring in groove
Tighten mounting screws of the flanges uniformly in crosswise order.
Observe the maximum torque according to the grade of screws and depth of
thread you use.