Samson 42-34 Mounting And Operating Instructions page 22

Design and principle of operation
Table 3-3: Materials · Material numbers according to DIN EN
Type 2423 Valve
Pressure rating
Valve body
Type 2423 Valve · Balanced by a bellows
Seat
Up to DN 100
Plug
DN 125 to 250
Plug stem
Metal bellows
Bottom section
Body gasket
Type 2423 Valve · Balanced by a diaphragm
Seat
Plug
Pressure balancing
Type 2424 and Type 2428 Actuators
Diaphragm cases
Diaphragm
Guide bushing
Seals
Optionally with soft seal with standard K
1)
Special version in 1.4409
2)
Table 3-4: Flow rate set point ranges for water · Type 2423 Valve, balanced by a bellows
∆p
∆p ∆p restric-
set point plant
tion
0.2 bar 0.1 bar 0.1 bar V Max. 1.4
0.5 bar 0.3 bar 0.2 bar V Max. 2
1.0 bar 0.5 bar 0.5 bar V Max. 3
Max. perm. diff. pressure ∆p
3-8
PN 16
Cast iron EN-GJL-250
DN 15 to 100: 1.4571 · DN 125 to 250: 1.4404
CC499K
Balancing cases made of sheet steel DD11 · Diaphragm plate EN-JS1030 · EPDM
1.0332
DU bushing
coefficients
VS
DN 15 20 25
.
V Min. 0.05 0.15 0.25 0.4
.
2.1 2.4
.
3 3.5
.
4.5 5.3
25 bar
PN 16, 25
Spheroidal graphite iron
EN-GJS-400-18-LT
1.4404, 1.4006
1.4404 or 1.4006
1.4301, 1.4404 with PTFE soft seal
1.4301
P265GH
Graphite on metal core
CC499K
2)
· With EPDM or PTFE soft seal, max. 150 °C
2)
balancing diaphragm, max. 150 °C
EPDM with fabric reinforcement
EPDM/PTFE
32 40 50 65
0.6 0.9 2
4.9 7.7 11.2 19
7 11 16 28
9.5 16 24 40
20 bar
PN 16, 25, 40
Cast steel 1.0619
1)
1.4301
PTFE
80 100 125 150 200 250
3.5 6.5 11 18
28 44 56 84
40 63 80 120 180 220
58 90 120 180 260 300
16 bar
12 bar
EB 3013 EN
–
20 26
126 154
10 bar