Danfoss EV260B Data sheet

Data Sheet

Solenoid valve
Type EV260B

Proportional servo operated for water, brine and oil regulation

EV260B is a proportional (modulating) servo­operated 2-way solenoid valve with
connections from 1/4” to 3/4”. Through stepless
regulation of the coil current, the armature can
be placed in any position in the armature tube,
thus setting the valve to any position between
fully closed and fully open. The valve is fully
open when the coil current has reached its
maximum value.

Features and versions

• For water, oil and similar neutral liquids

• Linear characteristic throughout the
regulation range

• Closes on power failure (fail-safe function)

• Clip on coil

• Ambient temperature: Up to 50 °C

• Coil enclosure: Up to IP67

• Standard 4 – 20 mA or 0 – 10 V DC pilot signal

AI178086429374en-000802

Features

EV260B

Body material

Brass

DN [mm]

6-20

DN [inch]

1/4-3/4

Connection G

G3/8'' - G1''

Connection NPT

NPT 1/4-3/4

Sealing material

PTFE

Function

NC

Kv [m3/h]

0.8-5

Cv [Gal/min]

0.9-5.8

Dierential pressure range [bar]

0.5-10

Dierential pressure range [psi]

7-156

Temperature range [°C]

-10-80

Temperature range [°F]

14-176

Solenoid valve, Type EV260B

1 Portfolio overview

Table 1: Portfolio overview

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1.2.3.4.5.6.Coil

Closing spring

Closing spring

Pilot orice

Diaphragm

Terminal box

Solenoid valve, Type EV260B

2 Functions

Proportional regulation of the opening and closing of the EV260B valves is achieved through stepless regulation of
the coil current and thus of the pulling force of the solenoid coil.

PWM (Pulse width Regulation) is recommended, to have the best regulation and avoid hysteresis.

When the coil current is increased, the pulling force of the coil (1) will at a certain point exceed the counteracting
spring force of the closing spring (2). The armature (3) moves up, opening the pilot orice (4) in the diaphragm (5),
which due to the servo eect follows the armature’s movement.

The valve is fully open when the coil current has reached its maximum value.

Through stepless regulation of the coil current the armature can be placed in any position in the armature tube, and
the valve thus set to any position between closed and open.

The eective coil current range for EV260B proportional valves without signal converter is approx. 300 – 600 mA.

The EV260B valves are also available with a signal converter built in the coil’s terminal box (6). The signal converter’s
output terminals are connected to the solenoid coil.

The signal converter regulates the coil current so that it is proportional to the input signal (pilot signal).

• The pilot signal may be a

◦ 0 – 10 V DC voltage signal or a
◦ 4 – 20 mA current signal

 NOTE:

The EV260B is not optimal as shut of valve at low dierential pressures and when PTFE seal can be damaged by
small particles.

Figure 1: Function NC

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Danfoss

32U1460

ON

OFF

24h

Danfoss

32U9100

Solenoid valve, Type EV260B

3 Applications

It is recommended to use a lter in front of the valve. Recommended lter 50 mesh (297 microns).

Figure 2: Filter

In water applications, exercise the valves at least once every 24 hours, meaning change the state of the valve. The
valve exercise will minimize the risk of the valve sticking due to calcium carbonate, zinc or iron oxide build-up.

Figure 3: Exercise: Valve on/o

To minimize scaling, and corrosion attack it is recommended that the water passing the valve have the following
values:

• Hardness 6-18 °dH to avoid scaling (chalk / lime stone build up).

• Conductivity 50 – 800 µS/cm to avoid brass dezincication and corrosion.

• Above 25°C media temperature avoid stagnant water inside the valve to avoid dezincication and corrosion
attack.

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Media

PTFE

For water, oil and similar neutral liquids

Media temperature [°C] [°F]

PTFE

-10-80°C / 14-176°F

Ambient temperature [°C] [°F]

Up to 55°C / 122°F

Kv value [m3/h]

DN6

0.8 m3/h

DN10

1.3 m3/h

DN15

2.1 m3/h

DN20

5 m3/h

Cv value [US gal/min]

1/4 inch

0.9 US gal/min

3/8 inch

1.5 US gal/min

9/16 inch

2.4 US gal/min

3/4 inch

5.8 US gal/min

Min. Opening dierential pressure [bar] [psi]

0.5 bar / 7 psi

Max. Opening dierential pressure [bar] [psi]

10 bar / 145 psi

Max. working pressure [bar] [psi]

10 bar / 145 psi

Max. test pressure [bar] [psi]

15 bar / 217 psi

Viscosity [cSt]

Max. 50 cSt

Rangeability and selection (DN6-DN20)

Since a proportional regulation valve it is recommended that operation dierential pressure is higher than 1 bar
and that average (middle) ow by size (DN 6, 10, 15, 20) is selected to be about 50% of full ow at given dierential
pressure. This will give the best regulation. Regulation in the range 0 – 5% of full ow may shorten the life time or
create noise.

Solenoid valve, Type EV260B

4 Product specication

4.1 Technical data

Table 2: Technical data

Capacity diagram

Example: Capacity for EV260B 6 at dierential pressure of 3 bar: Approx. 1.4 m3/h

Figure 4: Capacity diagram

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100

0 300 600 mA

0

Flow %

Supply voltage: 24 V pulsating d.c.

100

0

0 10 V

Flow %

Supply voltage: 21 – 30 V d.c.

4 20 mA

Flow %

Supply voltage: 21 – 30 V d.c.

Solenoid valve, Type EV260B

Signal ow characteristics

Figure 5: Coil type BK without signal converter

Coil type BK without signal converter

The basic version consists of a valve with a coil for pulsating direct current. The supply voltage of 24 V DC can be
established with full-wave rectied alternating current. The valve begins to open at a coil current of approx. 300 mA
and is fully open at a coil current of approx. 600 mA. The ratio between coil current and ow between the two outer
points is directly proportional.

Figure 6: Coil type BM with signal converter and 0 – 10 V pilot signal

Coil type BM with signal converter and 0 – 10 V pilot signal

The ratio between pilot signal and ow is directly proportional throughout the regulation range.

Figure 7: Coil type BL with signal converter and 4 – 20 mA pilot signal

Coil type BL with signal converter and 4 – 20 mA pilot signal

The ratio between pilot signal and ow is directly proportional throughout the regulation range.

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Components

Materials

Specications

Valve body

Brass

W.no. 2.0402

Armature

Stainless steel

W. no. 1.4105 / AISI 430FR

Armature tube

Stainless steel

W. no. 1.4306 / AISI 304L

Spindle

Stainless steel

W.no. 1.4105/AISI 430FR

Spring

Stainless steel

W.no. 1.4568

O-rings

NBR/ CR

Valve plate

FKM

Diaphragm

PTFE

Seat and guide ring

PTFE

Type

Weight gross

valve body with‐

out signal
converter

Weight gross
valve body with
signal converter

L

L1 with

terminal

box

L1 with signal

converter

L2H1H

2

B

[kg]

[mm]

EV260B 6

1.02

1.2262112

12830137168

EV260B 10

1.02

1.2262112

12830137168

EV260B 15

1.17

1.3781112

12830137168

EV260B 20

1.71

1.9198112

12830137168

Solenoid valve, Type EV260B

Materials

Table 3: Materials

4.2 Dimension and weight

Table 4: Dimension and weight

Figure 8: Dimension

4.3 Mounting

Figure 9: Mounting angle

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ISO228/1
connection

Orice

Kv value

Function

[mm]

[m3/h]

NC

G1/4

6

0.8

032U8052

G3/8

6

0.8

032U8053

G3/8

10

1.3

032U8054

G1/2

10

1.3

032U8055

G1/2

15

2.1

032U8056

G3/4

205032U8057

ISO228/1
connection

Orice

Cv value

Function

[inch]

[US Gal/min]

NC

NPT 1/4

1/4

0.9

032U8062

NPT 3/8

1/4

0.9

032U8063

NPT 1/2

9/16

2.4

032U8066

NPT 3/4

3/4

5.8

032U8067

Coil

Power consumption

Supply voltage

Enclosure

Features

Code no.

20 W DC

24 V full wave rectied

"IP67 only including seal

kit 018Z0090"

Terminal box

018Z6987

20 W DC

21 – 30 V

"IP65 only including seal

kit 018Z0090"

"With signal converter

Pilot signal: 0 – 10 V

2 metre cable"

018Z0290

20 W DC

21 – 30 V

"IP65 only including seal

kit 018Z0090"

"With signal converter

Pilot signal: 4 – 20 mA

2 metre cable"

018Z0291

Type

Voltage

Suitable for coil types

Code no.

[V]

BA024A

24 - 240

AL, AM, AS, AZ, BA, BD, BB

042N0185

Solenoid valve, Type EV260B

5 Ordering

5.1 Parts program

Table 5: Brass, valve body NC with G thread

Table 6: Brass, valve body NC with NPT thread

5.2 Accessories

Coil

Table 7: Below coils can be used with EV260B

Universal electronic multi-timer, Type ET 20 M

Figure 10: Type ET 20 M

Table 8: Type ET 20 M

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1.

2.

3.

4.

5.

6.

7.

Type EV260B 6-20

Spare part kit

Sealing

PTFE

EV260B 6

032U8039

EV260B 10

032U8040

EV260B 15

032U8041

EV260B 20

032U8042

1

2

3

4

5

6

7

Danfoss

80Z837

Locking button
Locking nut
Adjustment screw including o-ring
Complete armature with spring
O-ring
Diaphragm
O-ring

Solenoid valve, Type EV260B

Spare parts kit

Table 9: Spare parts kit

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