Danfoss EV245B Data sheet

Data Sheet

Solenoid valve Type EV245B

Servo piston operated for steam applications

EV245B is a servo piston operated 2/2-way solenoid valve for use in steam applications.

The servo piston operated design with PTFE seal on the main orice and steel valve plate in the armature secures a reliable function and long life in steam applications.

Features and versions

• Specically designed for steam applications, 160 - 185 °C

• Clip on coil

• Ambient temperature: Up to 40 °C

• Coil enclosure: IP65

• EV245B used with BQ coil

◦ AC voltage up to 185 °C

• EV245B used with BN coil

◦ DC voltage up to 160 °C

• EV245B used with BB coil

◦ AC voltage up to 160 °C ◦ DC voltage up to 140 °C

• Connection: ISO 228/1

AI247086497359en-000801

Features

EV245B

Body material

Brass

DN [mm]

15 - 20

Connection

G1/2'' - G3/4''

Sealing material

PTFE

Function

NC

Kv [m3/h]

4.5 - 5.5

Dierential pressure range [bar]

0.1-10

Temperature range [°C]

0-185

Solenoid valve, Type EV245B

1 Portfolio overview

Table 1: Portfolio overview

1.2.3.4.5.6.7.8.Coil

Valve plate

Pilot orice

Armature spring

Equalizing orice

Diaphragm

Main orice

Closing spring

Solenoid valve, Type EV245B

2 Function

2.1 Function NC

Coil voltage disconnected (closed)

When the voltage is disconnected, the valve plate (2) is pressed down against the pilot orice (3) by the armature spring (4). The pressure across the piston (6) is built up via the equalizing orice (5). The piston closes the main orice (7) as soon as the pressure across the piston 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 (1), the pilot orice (3) is opened. As the pilot orice is larger than the equalizing orice (5), the pressure across the piston (6) drops and therefore it is lifted clear of the main orice (7). The valve is

now open for unimpeded ow 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

Danfoss

32U1460

ON

OFF

24h

Danfoss

32U9100

Solenoid valve, Type EV245B

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.

Media

PTFE

Steam

Media temperature [°C]

BQ

0-185°C

BB AC BN DC

0-160°C BB DC

0-140°C

Ambient temperature [°C]

Max. 40 °C at a medium temperature of 185 °C

Kv value [m3/h]

DN15

4.5 m3/h

DN20

5.5 m3/h

Min. Opening dierential pressure [bar]

0.1 bar

Max. Opening dierential pressure [bar]

Up to 10 bar

Max. working pressure [bar]

Up to 10 bar (Equal to max. working pressure)

Max. test pressure [bar]

25 bar

Viscosity [cSt]

Max. 50 cSt

Connection ISO228/1

Coil type BQ AC

Coil type BN DC

Coil type BB AC

Coil type BB DC

[Bar]

G1/2

0.1-10

0.1-5

0.1-3.6

G3/4

0.1-10

0.1-5

0.1-3.6

Solenoid valve, Type EV245B

4 Product specication

4.1 Technical data

Table 2: Technical data

Dierential pressure range

Table 3: Dierential pressure range

Steam capacity diagrams

Example:

Capacity for EV245B 20BD inlet pressure (p1) of 6 bar absolute, at dierential pressure at 1 bar. Approx. 100kg/h/80kW

Main type

EV245B 15 – 20

Time to open [ms]

(1)

200

Time to close [ms]

(1)

2000

Components

Materials

Specications

Valve body/cover

Brass

EN 12165, CW 617N

Armature/armature stop

Stainless steel

W. no. 1.4105 / AISI 430FR

Armature tube

Stainless steel

W. no. 1.4306 / AISI 304L

Springs

Stainless steel

W. no. 1.4310 / AISI 301

Piston seal

PTFE

Piston ring

PTFE with

grate

Valve plate

Stainless steel

W. no. 1.4122

External gasket

PTFE

Solenoid valve, Type EV245B

Figure 4: Steam capacity diagrams

Time to open/close

Table 4: Time to open/close

(1)

The times are indicative. The exact times will depend on the pressure conditions.

Materials

Table 5: Materials

Type

LBH

H1H

2

Weight gross

valve body with

coil BQ, BB

Weight gross

valve body with

coil BN

[mm]

[kg]

EV245B 15B

80.55712424100

0.75

1.03

EV245B 20B

80.55712424100

0.72

1.00

67

65

Danfoss

32U1702.11

Coil type BQ, BB

32U1701.eps,32U1702_11.eps

Danfoss

32U1778.10

Solenoid valve, Type EV245B

4.2 Dimension and weight

Table 6: Dimension and weight

Table 7: Dimension

4.3 Mounting

Figure 5: Mounting angle

ISO228/1 connection

Orice

Kv value

Function

[mm]

[m3/h]

NC

G1/2

15

4.5

032U3833

G3/4

20

5.5

032U3853

Type

Tambient

Supply voltage

Voltage

variation

Frequency

Power consumption

Approval

Code no.

[°C]

[V]

[Hz]

[W]

[VA]

BQ024CS

-40 – 40 24

-15%, 10%5010

17

018F4517

24

-15%, 10%

60

9.0

16

BQ120BS

40 – 40

110 / 120

-15%, 6%6013.5

19

018F4519

BQ240CS

-40 – 40

230

-15%, 6%5010

17

018F4511

208 / 240

-6%, 6%609.5

16

Type

Tambient

Supply voltage

Voltage

variation

Frequency

Power consumption

Approval

Code no.

[°C]

[V]

[Hz]

[W]

[VA]

BN024DS

-40 – 5024±10%DC20

018F6968

Solenoid valve, Type EV245B

5 Ordering

5.1 Parts program

Table 8: Brass, valve body NC

5.2 Accessories

Coil

Coil type BQ AC Steam coil to 185 °C

Figure 6: Coil type BQ AC

Table 9: Coil type BQ AC Steam coil to 185 °C

Coil type BN DC Steam coils to 160 °C

Figure 7: Coil type BN DC

Table 10: Coil type BN DC Steam coils to 160 °C

Type

Tambient [°C]

Supply voltage

[V]

Voltage variation

Frequency [Hz]

Power consumption

Code no.

[W]

[VA]

BB024AS

-40 – 80

24

-15%, 10%501119018F7358

BB115AS

-40 – 80

115

-15%, 10%501119018F7361

BB230AS

-40 – 80

220 / 230

-15%, 10%501119018F7351

BB240AS

-40 – 80

240

-15%, 10%501119018F7352

BB440CS

-40 – 80 400

±10%5014

24

018F7353

440

±10%601524BB024BS

-40 – 80

24

-15%, 10%601423018F7365

BB110CS

-40 – 50 110

±10%5015

28

018F7360

110

±10%6013

22

BB230CS

-40 – 50

220 / 230

±10%6013

24

018F7363 220 / 230

±10%5016

31

Type

Tambient [°C]

Supply voltage

[V]

Voltage variation

Frequency [Hz]

Power consumption

Code no.

[W]

[VA]

BB012DS

-40 – 5012±10%DC14

018F7396

BB024DS

-40 – 5024±10%DC16

018F7397

Cable plug size

Description

Code no.

DIN 18

Cable plug IP67

042N1256

Solenoid valve, Type EV245B

Coil type BB AC Steam coils to 160 °C

Figure 8: Coil type BB AC

Table 11: Coil type BB AC Steam coils

Coil type BB DC Steam coils to 140 °C

Table 12: Coil type BB DC Steam coils

Cable plug

Figure 9: Cable plug

Table 13: Cable plug

1.

2.

3.

Type

Voltage

Suitable for coil types

Code no.

[v]

BA024A

24 - 240

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

042N0185

Type

Seal material

PTFE

EV245B (Coil: BQ, BN, BB, BR)

032U3121

1

2

3

Spring Assembled armature tted on piston Gasket PTFE

Solenoid valve, Type EV245B

Universal electronic multi-timer, Type ET 20 M

Figure 10: Type ET 20 M

Table 14: Universal electronic multi-timer, Type ET 20 M

Spare part

Table 15: Spare part kits for EV245B 15-20

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