Danfoss EV220A Data sheet

Data Sheet

Solenoid valve
Type EV220A

Indirect servo operated for compact installation in various applications

EV220A is a compact servo-operated 2/2-way
solenoid valve program, especially designed for
use in machines and equipment with limited
space.

Features

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

• Screw on coil

• Ambient temperatures: Up to 50 °C

• Enclosure: Up to IP65

• Low power consumption

• Liquid hammer damped

AI204086427956en-001101

Features

EV220A NC

EV220A NO

Body material

Brass

Brass

DN [mm]

6-50

6-22

Connection

G1/4'' - G2''

G1/4'' - G1''

Sealing material

EPDM, NBR, FKM

NBR

Kv [m3/h]

1 - 32

1 - 7

Dierential pressure range [bar]

0.2 - 16

0.2 - 16

Temperature range [°C]

-30 - 100

-10 - 90

Solenoid valve, Type EV220A

1 Portfolio overview

Table 1: Portfolio overview

© Danfoss | Climate Solutions | 2021.06 AI204086427956en-001101 | 2

1

2

3

4

5

7

6

Danfoss

80Z826

1.2.3.4.5.6.7.

Coil

Armature spring

Armature

Pilot orice

Diaphragm

Main orice

Equalizing orice

Solenoid valve, Type EV220A

2 Functions

2.1 Function, NC

Coil voltage disconnected

When voltage is disconnected, the armature spring (2) presses the armature (3) down against the pilot orice (4).
Pressure builds up over the diaphragm (5) via the equalizing orice (7). The diaphragm closes the main orice (6) as
soon as the pressure over the diaphragm equals the inlet pressure. The valve stays closed for as long as voltage
remains disconnected.

Coil voltage connected (open)

When voltage is applied to the coil (1), the pilot orice (4) is opened. Since the pilot orice is larger than the
equalizing orice (7), pressure over the diaphragm (5) falls and the diaphragm is lifted clear of the main orice (6).
The valve stays open for as long as the required least dierential pressure is present and voltage is applied to the
coil.

Figure 1: Function, NC

2.2 Function, NO

Coil voltage disconnected (Open)

When voltage is disconnected, the pilot orice (4) is opened. Since the pilot orice is larger than the equalizing
orice (6), pressure over the diaphragm (5) falls and the diaphragm is lifted clear of the main orice (7). The valve
stays open for as long as the required minimum dierential pressure is present and voltage is applied to the coil.

Coil voltage connected (Close)

When voltage is applied to the coil (1), the armature spring (2) presses the armature (3) down against the pilot

orice (4). Pressure builds up over the diaphragm (5) via the equalizing orice (6). The diaphragm closes the main
orice (7) as soon as the pressure over the diaphragm equals the inlet pressure. The valve stays closed for as long as

voltage remains disconnected.

© Danfoss | Climate Solutions | 2021.06 AI204086427956en-001101 | 3

1

2

3

4

5

7

6

Danfoss

80Z827

1.2.3.4.5.6.7.

Coil

Armature spring

Armature

Pilot orice

Diaphragm

Main orice

Equalizing orice

Solenoid valve, Type EV220A

Figure 2: Function, NO

© Danfoss | Climate Solutions | 2021.06 AI204086427956en-001101 | 4