Samson EB 2111 - Page 22

3-8 EB2111/2121/2123 EN
Design and principle of operation
Table 3-4: K
VS
coefcients, x
FZ
values and max. permissible differential pressures ∆p
Type2111 Valve·Unbalanced
Valve size DN 15 20 25 32 40 50
K
VS
coefcient 4.0 6.3 8.0 16 20 32
Max. perm. differential
pressureΔp
25bar
1)
16bar
1)
14bar 6bar 6bar
2)
4bar
Reduced K
VS
coefcient 0.1·0.4·1.0·2.5
0.1·0.4
1.0·4.0
1)
6.3
1)
8.0 16
Max. permissible differential
pressure∆p
25bar 16
14
6
Type2422 Valve · Balanced by a bellows
Valve size DN
15 20 25 32 40 50 65 80 100 125 150
Valve travel 10mm 16mm 22mm
K
VS
coefcient 4.0 6.3 8.0 16 20 32 50 80 125 190 280
Max. permissible differential
pressure∆p
25bar 20bar 16bar 12bar
Reduced K
VS
coefcient 2.5·4.0·6.3 6.3 8.0 16 32 80 125
Max. permissible differential
pressure∆p
25bar 20bar 16bar
x
FZ
value 0.65 0.6 0.55 0.45 0.4 0.35
Type 2422 Valve · Balanced by a diaphragm
Valve size DN 65 80 100
Valve travel 16mm
K
VS
coefcient 50 80 125
Max. permissible differential
pressure∆p
10bar
x
FZ
value 0.4 0.35
1)
WithEN-GJS-400-18-LT:Δpmax.=14bar
2)
IncombinationwithType2212STL:4bar