Page 70 - Bürkert

Envelope Dimensions [mm]

Brass body Stainless steel body

7 7
23.88 23.88
12 10
64 64 12 10 6024
125.4 D SW 22 C
24.5 125 24.5 D SW 22 C
C
50.5 C
A A A A 50.5
B B B B
24 31 SW 32
58 SW 32 65

Power consumption A B C D Coil size
G 1/2” 14 49 53 8 (49 mm coil)
NPT 1/2 (on request) 14 49 53 8 (49 mm coil)
G 3/4” 16 49 53 8 (49 mm coil)
NPT 3/4 (on request) 16 49 53 8 (49 mm coil)

Characteristics of a proportional valve Advice for valve sizing

In continuous flow applications, the choice of an appropriate
K 1,0
V valve size is much more important than with on/off valves. The
K
Vs
0,9 optimum size should be selected such that the resulting flow in
0,8 the system is not unnecessarily reduced by the valve. However,
a sufficient part of the pressure drop should be taken across the
0,7
valve even when it is fully opened.
0,6
0,5 Recommended value: ∆p > 30% of total pressure
valve
0,4 drop within the system
0,3
Otherwise, the ideal, linear valve curve characteristic is changed.
0,2
If the differential pressure (difference between inlet and outlet
0,1 pressure) exceeds half the value of the nominal pressure, the
0,0 characteristics may change.
0 5 10 [V] For that reason take advantage of Bürkert competent engineer-
4 12 20 [mA]
0 10 20 [mA] ing services during the planning phase!

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