ICPS600A402_1_oms - page 25

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© Danfoss A/S (IA-MC/mhe) 05-2007 / 520B2809
With the larger valves, very short closing times can
cause water hammer.
The EV220B servo-operated valves have damped
closing and fulfil EN 60730-2-8 specifications.
The table give the opening/closing times of the
various types, but it must be emphasised that
tube dimensions / lengths and differences in
operating conditions - especially pressure
- can cause deviations from the values given.
Opening and closing times
Closing times and water
hammer
Type
Opening [ms]
Closing [ms]
EV210B 1.5
EV210B 3
EV210B 6
10
20
20
20
20
20
EV250B 12
EV250B 18
EV250B 22
100
150
150
100
100
100
EV220B 10
EV220B 12
50
60
300
300
EV220B 15
EV220B 20
EV220B 25
EV220B 32
EV220B 40
EV220B 50
40
40
300
1000
1500
5000
350
1000
1000
2500
4000
10000
EV310B
10 - 20
10 - 20
High performance (blue)
range
Compact (black) range
Type
Opening [ms]
Closing [ms]
EV210A
7 - 10
7 - 10
EV220A 6
EV220A 10
EV220A 12
EV220A 14
EV220A 18
EV220A 22
EV220A 32
EV220A 40
EV220A 50
40
50
60
100
200
200
2500
4000
5000
250
300
300
400
500
500
4000
6000
10000
EV310A
7 - 10
7 - 10
1...,15,16,17,18,19,20,21,22,23,24 26,27,28,29,30,31,32,33,34,35,...44
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