Danfoss EV220W Data sheet

Data Sheet

Solenoid valve
Type EV220W

Indirect servo operated for compact installation in various applications

EV220W is a range of compact indirect servo­operated 2/2 way solenoid valves with
connections from 3/8” to 2”, especially
designed for use within a limited space. This
range has been designed for use within various
markets, such as, the Industrial and HVAC
markets, which demand an easy and reliable
valve that is easy to setup and use.

Features and versions

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

• NBR for air and oil

• WRAS approved with EPDM sealing; 0 – 90 °C
NC version 0 – 50 °C NO version

• Standard equipped with clip on coil for dry
and humid environments

• Enclosure: IP65

AI236986440888en-001101

Features

EV220W

Body material

Brass

DN [mm]

10-50

Connection

G3/8'' - G2''

Sealing material

EPDM, NBR

Function

NC, NO

Kv [m3/h]

1.6-32

Dierential pressure range [bar]

0.2-10

Temperature range [°C]

-30-100

Solenoid valve, Type EV220W

1 Portfolio overview

Table 1: Portfolio overview

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Coil

Armature spring

Armature

Pilot orice

Diaphragm

Equalizing orice

Main orice

Solenoid valve, Type EV220W

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 (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.

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 (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.

Figure 1: Function, NC

© Danfoss | Climate Solutions | 2021.11 AI236986440888en-001101 | 3

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Coil

Armature spring

Armature

Pilot orice

Diaphragm

Equalizing orice

Main orice

Solenoid valve, Type EV220W

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.

Figure 2: Function, NO

© Danfoss | Climate Solutions | 2021.11 AI236986440888en-001101 | 4