Danfoss EV210B How To Use Manual page 26

Opening and closing times
Changing opening and
closing times
Orifice EV220B 5
Open Close
[mm]
0.5 1 0.04 0.35
0.8 2 0.04 0.3
1.2 3 0.04 0.12
1.4 4 0.04 0.1
1 Number of grooves
24
Please note for high performance type.
EV220B 15-50 closing times can be changed by
replacing the equalising orifice at the inlet side
of the valve (see "Water hammer", page 15, and
"Spare parts", page 34). To decrease water hammer,
choose a smaller equalising orifice.
The table shows the opening and closing times
depending on the equalising orifice chosen
(standard times marked in bold). The times stated
cover water as a medium, and are for guidance
only. Tube dimensions / lengths and operating
conditions, for example differential pressure, may
influence the values.
EV220B 20 EV220B 25
Open Close Open
0.04 1.0 0.11
0.04 0.5 0.3
0.04 0.25 0.30
0.06 0.18 0.30
EV220B 2
Close Open Close
[s]
3.0 1.6 6.0
1.0 1.0 2.5
0.5 1.2 1.0
0.4 1.0 0.8
EV220B 40 EV220B 50
Open Close Open Close
1.3 8.0 3.4
1.5 4.0 3.6
1.5 2.0 5.0
2.0 1.5 5.2
IC.PS.600.A4.02 / 520B2809 IC.PS.600.A4.02 / 520B2809
40.0
11.0
10.0
6.5