Danfoss EV220B, EV220BW Data sheet

Data Sheet

Solenoid valve
Type EV220B and EV220BW

EV220B 6-22 and EV220BW 12 NO:

General purpose valves for water, brine, air and oil applications

EV220B 6 - EV220B 22 and EV220BW 12 NO is a
direct servo-operated 2/2-way solenoid valve
program with connections from 1/4” to 1”. This
program is especially for OEM applications
demanding a robust solution and moderate
ow rates.

Features

• For water, oil, compressed air and similar
neutral media

• Clip on coil

• Ambient temperature: Up to 80 °C

• Coil enclosure: Up to IP67

AI236986441887en-001203

Features

EV220B 6 - 22

EV220B 6-10

EV220B 6-12

EV220BW 12

Body material

Brass

DZR Brass

Brass

DZR brass

DN [mm]

6 - 22

6 - 10

6 - 12

12

Connection

G1/4'' - G1''

G3/8'' - G1/2''

G3/8'' - G1/2''

G1/2''

Sealing material

EPDM, FKM

EPDM

EPDM, FKM

EPDM

Function

NCNCNO

NO

Kv [m3/h]

0.7 - 6

0.7 - 1.5

0.7 - 2.5

2.5

Dierential pressure range [bar]

0.1 - 20

0.1 - 20

0.1 - 10

0.3 - 10

Temperature range [°C]

-30 - 100

-30 - 100

-30 - 100

-30 - 100

Solenoid valve, Type EV220B and EV220BW

1 Portfolio overview

Table 1: Portfolio overview

© Danfoss | Climate Solutions | 2022.03 AI236986441887en-001203 | 2

1.2.3.4.5.6.7.8.Armature spring

Armature

Valve plate

Equalizing orice

Main orice

Pilot orice

Diaphragm

Coil

Solenoid valve, Type EV220B and EV220BW

2 Function

2.1 Function NC

Coil voltage disconnected (closed)

When the supply voltage to the coil (8) is disconnected, the valve plate (3) is pressed down against the pilot orice
(6) by the armature spring (1). The pressure across the diaphragm (7) is built up via the equalizing orice (4). The
diaphragm closes the main orice (5) as soon as the pressure across the diaphragm is equivalent to the inlet
pressure. The valve will be closed for as long as the voltage to the coil is disconnected.

Coil voltage connected (open)

When voltage is applied to the coil, the pilot orice (6) is opened. As the pilot orice is larger than the equalizing
orice (4), the pressure across the diaphragm (7) drops and therefore it is lifted clear of the main orice (5). The valve

is now open and will be open for as long as the minimum dierential pressure across the valve is maintained, and
for as long as there is voltage to the coil.

Figure 1: Function NC

2.2 Function NO

Coil voltage disconnected (open)

When the voltage to the coil (8) is disconnected, the pilot orice (6) is open. As the pilot orice is larger than the
equalizing orice (4), the pressure across the diaphragm (7) drops and therefore it is lifted clear of the main orice
(5). The valve will be open for as long as the minimum dierential pressure across the valve is maintained, and for as
long as the voltage to the coil is disconnected.

Coil voltage connected (closed)

When voltage is applied to the coil, the valve plate (3) is pressed down against the pilot orice (6). The pressure
across the diaphragm (7) is built up via the equalizing orice (4). The diaphragm closes the main orice (5) as soon
as the pressure across the diaphragm is equivalent to the inlet pressure. The valve will be closed for as long as there
is voltage to the coil.

© Danfoss | Climate Solutions | 2022.03 AI236986441887en-001203 | 3

1
2

3
4

5

8

6
7

1.2.3.4.5.6.7.8.Armature

Opening spring

Valve plate

Equalizing orice

Main orice

Pilot orice

Diaphragm

Coil

Solenoid valve, Type EV220B and EV220BW

Figure 2: Function NO

© Danfoss | Climate Solutions | 2022.03 AI236986441887en-001203 | 4