Data sheet
Solenoid valve for R410A and R744
Types EVR 2 - EVR 6 and EVRH 10 - EVRH 40
EVRH high pressure range is a direct or
servo operated solenoid valve specially
designed to meet the requirements for high
pressure refrigerants as R410A and R744.
The EVRH valve can be used for liquid,
suction and hot gas lines.
Features
Approvals
y Normally closed
y Wide choice of coils for AC and DC voltage
y Suitable for R410A and R744
y Designed for media temperatures up to 105 °C
y Design pressure 45.2 barg
Low Voltage Directive (LVD) 2006/95/EC
Versions with UL approval can be supplied
on request
y MOPD up to 38 bar (550 psi) with 20 W coil
y Solder connection up to 1 5/8 in.
y Extended ends for soldering
y It is not necessary to dismantle the valve
during soldering.
© Danfoss | DCS (rja) | 2016.11
DKRCC.PD.B00.B9.02 | 1
Data sheet | Solenoid valve for R410A and R744, Types EVR 2 - EVR6 and EVRH 10 - EVRH 40
Technical data
Temperature of medium
-40 – 105 °C for 10 or 12 W coil
Max. 130 °C during defrost
-40 – 80 °C for 20 W coil
Opening differential pressure with standard coil ∆p [bar]
Typ e
Min. 10 W AC 12 W AC 20 W AC 20 W DC
Max. (MOPD) liquid
Refrigerant
R744, R22/R407C, R404A/R507, R410A,
R134a, R407A, R23.
For other refrigerants, please contact Danfoss.
Note: EVR 2-3 and EVRH 25-40 are not suitable for R744
applications with media temperatures constantly below 0 °C.
For other media temperatures, please contact Danfoss.
Max. working
1)
2)
Kv value
[m3/h]
pressure Ps
[barg]
EVR 2 0.0 25 25 38 18 0.16 45.2
EVR 3 0.0 21 25 38 18 0.27 45.2
EVR 6 0.05 21 25 38 18 0.8 45.2
EVRH 10 0.05 21 25 38 18 1.9 45.2
EV RH 15 0.05 21 25 38 18 2.6 45.2
EVRH 20 (AC) 0.05 21 25 38 — 5.0 45.2
EVRH 20 (DC) 0.05 — — — 16 5.0 45. 2
EVRH 25 0.2 21 25 40 18 10. 0 45.2
EVRH 32 0.2 21 25 40 18 16. 0 45.2
EVRH 40 0.2 21 25 40 18 25.0 45.2
1)
The Kv value is the water flow in [m3/h] at a pressure drop
across the valve of 1 bar ρ = 1000 kg/m3.
2)
MOPD (Max. Opening Pressure Differential) for media in gas
form is approx. 1 bar greater.
Ordering
Ambient temperature and enclosure for coil:
see separate brochure “coils for solenoid valve”.
Solenoid valve – Normally closed (NC) – Soldering ODF without manual stem – without coil
Typ e Coil type
EVR 2
AC
AC
Connection size
[in.]
AC / DC
EVR 3
AC / DC
AC / DC
AC / DC
AC / DC
EVR 6
AC / DC
AC / DC
AC / DC
EVRH 10
AC / DC
AC / DC
EV RH 15 AC / DC
EVRH 20 AC
EVRH 20 DC
EVRH 25 AC / DC 1 1/
EVRH 32 AC / DC
EVRH 40
1)
1)
With manual stem
AC / DC 1 5/
1
4
/
—
1
4
/
3
8
/
—
—
1
2
/
3
8
/
—
—
1
2
/
—
5
8
/
7
8
/
7
8
/
8
—
8
Connection size
[mm]
—
6 032F120 2
—
—
6 032F1207
10 032F120 8
—
—
10 032F1213
12 032 F12 36
—
12 032G1055
16 032G1056
22 032G1057
22 032G1058
—
35 032G10 81
—
Code no.
032F1201
032F120 6
032F120 4
032F120 9
032F1212
032G105 4
032G1059
032G1062
© Danfoss | DCS (rja) | 2016.11
DKRCC.PD.B00.B9.02 | 2
Data sheet | Solenoid valve for R410A and R744, Types EVR 2 - EVR6 and EVRH 10 - EVRH 40
Capacity R410A
Capacities are based on:
Liquid temperature tl = 25 °C
ahead of the valve
Evaporating
temperature te = -10 °C
Superheat 0 K
Liquid capacity Qc [kW]
Typ e
0.1 0.2 0.3 0.4 0.5
Liquid capacity Qc at pressure drop across valve ∆p [bar]
R410A
EVR 2 2.58 3.64 4.46 5.15 5.76
EVR 3 4.35 6.15 7.53 8.69 9.72
EVR 6 12. 88 18. 21 22.30 25.76 28.80
EVRH 10 30.58 43.25 52.97 61.17 68.39
EV RH 15 41.85 59 .19 72.49 83.70 93.58
EVRH 20
EVRH 25 160.97 2 27. 6 4 278.81 321.94 359.94
EVRH 32 2 57.55 364.23 446.09 515.10 575.90
EVRH 40 402.42 5 69 .11 69 7.02 804.85 899.85
Correction factors
When sizing valves, the plant capacity must
be multiplied by a correction factor
depending on liquid temperature tl ahead
of the valve / evaporator.
80.48 113 . 82 139.4 0 160.97 17 9.9 7
When the corrected capacity is known,
the selection can be made from the table.
Correction factors for liquid temperature t
tf [°C] -10 0 10 15 20 25 30 35 40 45 50
R410A 0.73 0.79 0.86 0.9 0.95 1 1.06 1.14 1.23 1.33 1.47
l
© Danfoss | DCS (rja) | 2016.11
DKRCC.PD.B00.B9.02 | 3
Data sheet | Solenoid valve for R410A and R744, Types EVR 2 - EVR6 and EVRH 10 - EVRH 40
Capacity R410A
(continued)
Capacities are based on liquid
temperature tl = 25 °C ahead
of evaporator.
The table values refer to the
evaporator capacity and are
given as a function of
evaporating temperature te
and pressure drop ∆p across
the valve.
Capacities are based on dry,
satuated vapour ahead
of the valve.
During operation with
superheated vapour ahead of
the valve, the capacities are
reduced by 4% for each 10 K
superheat.
Suction vapour capacity Q
Typ e
Pressure
drop
∆ [bar]
R410A
0.07 0 .16 0.20 0.25 0.31 0.37 0.44
EVR 2
EVR 3
EVR 6
EVRH 10
EV RH 15
EVRH 20
EVRH 25
EVRH 32
EVRH 40
0.15 0.23 0.29 0.36 0.45 0.54 0.64
0.20 0.26 0.33 0.42 0.51 0.62 0 .74
0.07 0.27 0.34 0.42 0.52 0.63 0.75
0.15 0.38 0.49 0.61 0.75 0.91 1. 09
0.20 0.43 0.56 0.70 0. 87 1.05 1.25
0.07 0.79 1.01 1.26 1.54 1. 86 2.21
0.15 1.13 1. 45 1.82 2.24 2.70 3.22
0.20 1.28 1.66 2.09 2.57 3.11 3.71
0.07 1.88 2.40 2.99 3.66 4. 41 5.25
0.15 2.68 3.45 4.32 5.31 6.42 7.6 5
0.20 3.03 3.94 4.96 6.10 7. 39 8.81
0.07 2.57 3.28 4.09 5.01 6.03 7.18
0.15 3.66 4.72 5.92 7.27 8.78 10.47
0.20 4.15 5.38 6.78 8.35 10.11 12. 06
0.07 4.95 6 .31 7.87 9.63 11. 6 0 13. 80
0.15 7.0 4 9.07 11. 38 13.9 8 16.8 9 20.13
0.20 7.9 8 10 .36 13. 04 16.06 19.43 23.18
0.07 9.90 12. 63 15.74 19.26 23. 21 2 7. 61
0.15 14.0 8 18.15 22.76 2 7.96 33.78 40.25
0.20 15 .95 20.71 26.08 32 .12 38 .87 46. 37
0.07 15.85 20.20 25.18 30.81 37.13 44.17
0.15 22.53 29.04 36.42 44.74 54.05 64.41
0.20 25.52 33.14 41.74 51.40 62.19 74.19
0.07 24.76 31.56 39.34 48 .14 58 .01 69.02
0.15 35.20 45.37 56.90 69.90 84.45 100.64
0.20 39.88 51.78 65. 21 80.31 9 7.17 115. 92
c
Suction vapour capacity Qc [kW] at evaporating temperature te [°C]
-40 -30 -20 -10 0 10
© Danfoss | DCS (rja) | 2016.11
Correction factors
When sizing valves, the evaporator capacity
must be multiplied by a correction factor
When the corrected capacity is known,
the selection can be made from the table.
depending on liquid temperature tl ahead
of expansion valve.
Correction factors
tf [°C] -10 0 10 15 20 25 30 35 40 45 50
R410A 0.76 0.80 0.89 0.92 0.96 1.0 1.05 1.11 1.18 1. 26 1.37
DKRCC.PD.B00.B9.02 | 4
Data sheet | Solenoid valve for R410A and R744, Types EVR 2 - EVR6 and EVRH 10 - EVRH 40
Capacity R410A
(continued)
An increase in hot gas
temperature th of 10 K, based
on th = tc 25 °C reduces valve
capacity approx. 2% and
vice versa.
A change in evaporating
temperature te changes valve
capacity: see correction factor
table below.
Hot gas capacity Qh [kW]
Typ e
Pressure drop
∆p [bar]
R410A (EVR 2 – 6, EVRH 10 – 20)
0.1 0.59 0.62 0.63 0.64 0 .61
0.2 0.83 0.87 0.89 0.90 0.86
EVR 2
EVR 3
EVR 6
EVRH 10
EV RH 15
EVRH 20
0.4 1.16 1.2 2 1.26 1.26 1.22
0.8 1.62 1.71 1.77 1.78 1.72
1.6 2.21 2.36 2.45 2.48 2.40
0.1 0.99 1. 04 1. 07 1.07 1.03
0.2 1.4 0 1.47 1. 51 1. 51 1.4 6
0.4 1.96 2.06 2 .13 2.13 2.06
0.8 2.73 2.88 2.98 3.00 2.90
1.6 3.73 3.98 4 .14 4 .18 4.06
0.1 2.94 3.08 3.17 3.18 3.06
0.2 4.14 4.35 4.47 4.49 4.32
0.4 5.81 6 .11 6.30 6.32 6 .10
0.8 8.08 8.54 8.83 8.88 8.58
1.6 11. 0 4 11. 78 12.26 12.39 12. 02
0.1 6.98 7. 32 7. 53 7. 54 7.27
0.2 9.83 10. 33 10. 62 10. 65 10.27
0.4 13 . 8 0 14.52 14.96 15.01 14.49
0.8 19.19 20.28 20.97 21.09 20.38
1.6 26.23 27.98 29.11 29.43 28.54
0.1 9.55 10. 02 10.3 0 10. 32 9.95
0.2 13 .46 14 .13 14. 54 14. 58 14. 05
0.4 18.88 19.87 20.47 20.55 19. 82
0.8 26.27 2 7.76 28.69 28.86 27.9 0
1.6 35.89 38.29 39.84 40.27 39.05
0.1 18.37 19.27 19.81 19. 85 19.13
0.2 25.88 27.17 27.96 28.03 2 7. 02
0.4 36.31 38.20 39.36 39.51 3 8.12
0.8 50.51 53.38 55.17 55.51 53.64
1.6 69.03 73.64 76.61 77. 4 4 75 .10
Evaporating temp. te -10 °C, hot gas temp. th = tc 25 °C,
Subcooling ∆t
Condensing temperataure tc [°C]
20 30 40 50 60
sub
= 4 K
© Danfoss | DCS (rja) | 2016.11
Correction factors
When sizing valves, the table value must be
multiplied by a correction factor depending
on evaporting temperature te.
Correction factors for liquid temperature t
tf [°C] -40 -30 -20 -10 0 10
R410A 0.92 0.95 0.98 1.0 1.02 1.03
l
An increase in hot gas temperature th of 10 K
reduces valve capacity approx 2% and vice versa.
DKRCC.PD.B00.B9.02 | 5
Data sheet | Solenoid valve for R410A and R744, Types EVR 2 - EVR6 and EVRH 10 - EVRH 40
Capacity R410A
(continued)
An increase in hot gas
temperature th of 10 K, based
on th = tc 25 °C reduces valve
capacity approx. 2% and
vice versa.
A change in evaporating
temperature te changes valve
capacity: see correction factor
table below.
Hot gas capacity Qh [kW]
Typ e
Pressure drop
∆p [bar]
R410A (EVRH 25 – 40)
0.1 36. 74 38.54 39.62 39.71 38.26
0.2 51.76 54.35 55.91 56.06 54.05
EVRH 25
EVRH 32
EVRH 40
0.4 7 2.61 76.40 78.72 79.02 76.24
0.8 101.02 106. 76 110 .3 5 111. 0 2 10 7. 29
1.6 13 8 .05 147. 2 8 15 3.22 15 4.8 8 150.20
0.1 58.79 61. 67 63.40 63.53 61. 2 2
0.2 82.81 86.95 89.46 89.70 86.47
0.4 116.1 8 122.25 125. 9 6 126 .4 4 121. 9 9
0.8 161.63 17 0 . 82 176.55 177. 63 171.66
1.6 220.88 235.6 4 245.15 247. 80 240.32
0.1 91.85 96.35 99.06 99. 27 95.66
0.2 129. 39 13 5.86 139.7 8 14 0.16 135 .11
0.4 181.53 191.01 196.81 19 7.56 19 0.61
0.8 252.55 266.91 275.86 2 77. 5 4 268.22
1.6 345.13 36 8.19 383.04 38 7.19 375.50
Evaporating temp. te -10 °C, hot gas temp. th = tc 25 °C,
Subcooling ∆t
Condensing temperataure tc [°C]
20 30 40 50 60
sub
= 4 K
Correction factors
When sizing valves, the table value must be
multiplied by a correction factor depending
on evaporting temperature te.
Correction factors for liquid temperature t
tf [°C] -40 -30 -20 -10 0 10
R410A 0.92 0.95 0.98 1.0 1.02 1. 03
l
An increase in hot gas temperature th of 10 K
reduces valve capacity approx 2% and vice versa.
Capacity R744
Due to the fact that EVRH only can be used for
sub critical R744 application, capacity tables are
not illustrated in this catalog. For capacity
dimension please refer to the Danfoss Cool
selector® or contact your local Danfoss office.
Note: EVR 2-3 and EVRH 25-40 are not suitable for R744
applications with media temperatures constantly below 0 °C.
For other media temperatures, please contact Danfoss.
© Danfoss | DCS (rja) | 2016.11
DKRCC.PD.B00.B9.02 | 6
Data sheet | Solenoid valve for R410A and R744, Types EVR 2 - EVR6 and EVRH 10 - EVRH 40
Design / Function
EVR 2 – 6 and EVRH 10 – 20
EVRH 25
50
16
18
29
43
Danfoss
32G1059 FW
4. Coil
16. Armature
18. Valve plate
/ Pilot valve plate
24. Connection for flexible
steel hose
28. Gasket
29. Pilot orifice
37. DIN socket (to DIN 43650)
40. Protective cap
/ Terminal box
43. Valve cover
44. O-ring
45. Valve cover gasket
49. Valve body
50. Gasket
73. Equalization hole
80. Diaphragm / Servo piston
83. Valve seat
90. Mounting hole
EVRH 32 – 40
50
16
18
29
49
43
49
Danfoss
32G1081 FW
43
50
16
18
29
49
Danfoss
32G1062 FW
© Danfoss | DCS (rja) | 2016.11
DKRCC.PD.B00.B9.02 | 7
Data sheet | Solenoid valve for R410A and R744, Types EVR 2 - EVR6 and EVRH 10 - EVRH 40
Design / Function
(continued)
EVRH solenoid valves are designed on two different principles:
1. Direct operation
2. Servo operation
1. Direct operation
EVR 2 and EVR 3 are direct operated. The valves
open directly for full flow when the armature (16)
moves up into the magnetic field of the coil. This
means that the valves operate with a min.
differential pressure of 0 bar. The valve plate (18)
is fitted directly on the armature (16). Inlet
pressure acts from above on the armature and
the valve plate. Thus, inlet pressure, and spring
force act to close the valve when the coil is
currentless.
2. Servo operation
EVR 6 and EVRH 10 – 20 are servo operated with
a “floating” diaphragm (80). The pilot orifice (29)
is placed in the centre of the diaphragm. The
pilot valve plate (18) is fitted direct to the
armature (16). When the coil is currentless, the
main orifice and pilot orifice are closed. The pilot
orifice and main orifice are held closed by the
armature spring force and the differential
pressure between inlet and outlet sides. When
current is applied to the coil the armature is
drawn up into the magnetic field and opens the
pilot orifice. This relieves the pressure above the
diaphragm, i.e. the space above the diaphragm
becomes connected to the outlet side of
the valve.
The differential pressure between inlet and
outlet sides then presses the diaphragm away
from the main orifice and opens it for full flow.
Therefore a certain minimum differential
pressure is necessary to open the valve and keep
it open. For EVR 6 and EVRH 10 – 20 valves this
differential pressure is 0.05 bar. When current is
switched off, the pilot orifice closes. Via the
equalization holes (73) in the diaphragm, the
pressure above the diaphragm then rises to the
same value as the inlet pressure and the
diaphragm closes the main orifice.
EVRH 25 – 40 are servo operated piston valves.
The valves are closed with currentless coil. The
servo piston (80) with main valve plate (84)
closes against the valve seat (83) by means of the
differential pressure between inlet and outlet
side of the valve and the force of the
compression spring (76).
When current to the coil is switched on, the pilot
orifice (29) opens. This relieves the pressure on
the piston spring side of the valve. The
differential pressure will then open the valve. The
minimum differential pressure needed for full
opening of the valves is 0.2 bar.
© Danfoss | DCS (rja) | 2016.11
DKRCC.PD.B00.B9.02 | 8
32F665.10.20FW
Data sheet | Solenoid valve for R410A and R744, Types EVR 2 - EVR6 and EVRH 10 - EVRH 40
Material specifications EVR 2 – 6 and EVRH 10 – 25
3
8
2
5
1
7
Danfoss
No. Description
1 Valve body
2 Cover
3 Armature tube
4 Armature tube nut EVRH 25 Stainless steel X8 CrNiS 18-9 — 1.4305 — 10 088
5 Gasket
6 Gasket EVRH 25 Al. gasket Al 99.5 — 3.0255 — 10210
7 Solder tube
8 Screws
Spindle for man.
9
operat.
10 Gasket EVRH 25 Rubber Cr — — — —
Solenoid
valves Type
EVR 2 – 6
EVRH 10 – 25
EVR 2 – 6 Stainless steel X5 CrNi18-10 — 1.4301 — 1008 8
EVRH 10 – 20 Brass CuZn40Pb2 CW 617 N 2.0402 17672-1 1216 5
EVRH 25 Cast iron EN-GJS-400-18-LT E N-JS1025 — — 15 63
EVR 2 – 6
EVRH 10 – 25
EVR 2 – 6
EVRH 10 – 25
EVR 2 – 6
EVRH 10 – 25
EVR 2 – 6
EVRH 10 – 25
EVRH 25 Stainless steel X8 CrNiS 18-9 — 1.4305 — 10088
Material Analysis Mat.no. W.no.
Brass CuZn40Pb2 CW617N 2.0402 17672 -1 12165
Stainless steel X2 CrNi19-11 — 1.4306 — 1008 8
Rubber Cr — — — —
Copper SF-Cu CW024A 2.0090 1787 124 49
Stainless steel A2-70 — — 3506 —
Standard
DIN EN
© Danfoss | DCS (rja) | 2016.11
DKRCC.PD.B00.B9.02 | 9
32G1081 FW
32G1062 FW
Data sheet | Solenoid valve for R410A and R744, Types EVR 2 - EVR6 and EVRH 10 - EVRH 40
Material specifications
(continued)
EVRH 32 – 40
4
3
6
5
6
9
8
Danfoss
2
1
56 4
3
6
2
Danfoss
8
9
1
No. Description Material Analysis Mat.no. W. no.
1 Valve body Cast Iron EN-GJS-400-18-LT EN-JS1025 — — 1563
2 Cover Brass CuZn40Pb2 C W617N 2.0402 — 12165
3 Armature tube Stainless steel X2 CrNi19-11 — 1.4306 — 1008 8
4 Armature tube nut Stainless steel X8 CrNiS 18-9 — 1.4305 — 10088
5 Gasket Rubber Cr — — — —
6 Gasket Al. gasket Al 99.5 — 3.0255 — 10210
7 Solder tube Bi-metallic tube Stainless steel/ Cu CW024A 2.0090 1787 124 49
8 Screws Stainless steel A 2-70 — — 3506 —
Spindle for. man.
9
operation
Stainless steel X8 CrNiS 18-9 — 1.4305 — 1008 8
Standard
DIN EN
© Danfoss | DCS (rja) | 2016.11
DKRCC.PD.B00.B9.02 | 10
Data sheet | Solenoid valve for R410A and R744, Types EVR 2 - EVR6 and EVRH 10 - EVRH 40
Dimensions and weights
EVR 2 – 6 and EVRH 10 – 20
Danfoss
EVRH 25
© Danfoss | DCS (rja) | 2016.11
EVRH 32
Danfoss
DKRCC.PD.B00.B9.02 | 11
.FW
.FW
Dimensions and weights
(continued)
EVRH 40
Danfoss
Coil with cable Coil with DIN plugs
Net weight of coil 10 W: approx. 0.3 kg
12 and 20 W: approx. 0.5 kg
EVRH 25, EVRH 32 – 40, solder connection
Typ e
Connection solder H
1
[in.] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [kg]
1
EVR 2, EVR 3
EVR 6
EVRH 10
EV RH 15
EVRH 20
EVRH 25 1 1/
4
/
3
8
/
1
2
/
5
8
/
7
8
/
8
6 14 64 9 102 7 33 0.2
10 14 75 10 111 9 36 0.3
12 16 76 10 127 10 46 0.5
16 19 83 — 176 12 56 0.8
22 20 87 — 191 17 72 1. 0
— 38.5 130 . 5 — 206 22 82 3.0
EVRH 32 — 35 50 10 4 — 242 18 80 4.3
EVRH 40 1 5/
8
— 53 104 — 260 29 80 4.3
2
H
3
H
L L
2
B Net weight
© Danfoss | DCS (rja) | 2016.11
DKRCC.PD.B00.B9.02 | 12
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