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lf construction work is still in progress, non--mounted valves
must be protected against dust, sand and building material etc.(cover
with suitable means).
Do not use valve handles and gear handwheels as footholds!
Valves and pipes used for high (> 60 ° C) or low (< 0 ° C)
temperatures must either be fitted with a protective insulation, or there
must be warning signs fitted showing that it is dangerous to touch
these valves.
lf a valve is used as end-valve in a pipe, this valve should be
protected against unauthorized or unintentional opening to prevent
personal injury or damage to property.
7.2.
Installation conditions
7.2.1. Recommended
between the position of the valve and of the
T- -piece or elbow.
1 DN
1
3
5--6 DN
DN
DN
1 DN
2
4
3 DN
DN
DN
7.2.2. Flanging dimensions
Connection to the piping.
Piping flanges must match the following dimensions.
Ø6
Ø2a
Ø3
Ø2a: max. allowable diameter on flange face
Ø2b: external diameter of the pipe when fitting loose plate flange with
lapped pipe end
Ø3:
allowed minimum diameter on flange face
Ø6:
allowed minimum diameter of raised face.
In case of downstream dismantling, the tightening torque must be
limited to the following value :
C1 maxi (mdaN) for body valves type 2
C2 maxi (mdaN) for body valves type 4
minimum
distances
3 DN
1 DN
5
DN
3 DN
1 DN
6
DN
Ø6
Ø2b
DN
NPS
ø2a
ø2b
20
¾
32
27
25
1
37
34
32
1 ¼
46
43
40
1 ½
54
49
50
2
63
61
2 ½
65
80
77
80
3
93
89
100
4
116
115
125
5
141,5
140
150
6
170,5*
169
200
8
222*
220
250
10
276,5*
273
300
12
327,5*
324
350
14
361
356
400
16
412
407
450
18
463
457
500
20
515
508
600
24
617
610
* Please check the body is well centered between the tie--rods
7.3.
Handling
Handling means may be necessary to install valves sizes > 200.
Do not hang the valve by its neck or handle or actuator.
7.4.
Recommendations for installation
Before assembly
-- Verify that pipeline flanges are free from metallic chips and weld
splatter.
-- Verify that pipeline flanges are located on the same centreline and
are parallel.
-- Verify that inside diameter of pipeline flange is in accordance with
the minimum and maximum diameters defined in the table of
subchapter 7.2.2.
-- Verify that nothing hinders the complete moving of the disc during
opening or closing, in particular at the internal weld seams or at the
pipe ends.
-- Pull apart the pipeline flanges to allow valve insertion without
damaging the elastomer liner of the valve.
During assembly
-- Place the disc as spaced apart as possible from the closing position,
but without that disc protrudes past the valve's body.
-- Insert valve between pipeflanges and center using several tie--rods.
-- Screw up progressively the nuts until metal to metal contact is
achieved between the valve body and pipeline flanges, by making
sure the good centering of the body compared with the flange is
maintained.
-- Operate the valve several times to ensure no valve disc obstruction.
ø3
ø6
C1
C2
46
0.4
5
15
55
0.4
5
31
67
0.8
5
32
77
1
5
1.3
5
33
86
55
107
1.6
5
71
121
2.7
5
90
141
3
5
119
171
3.2
5
4.7
10
144
196
196
250
6
10
249
306
8.1
10
297
358
10
10
10
326
399
370
452
16
422
505
24
470
558
566
664
17
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