Installation, Operating & Maintenance Instructions

Series 64, DN 63-400 (I.D. 21/2" - 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.