Danfoss EVT Data sheet

Data Sheet
Solenoid Valve Type EVT
EVT high pressure range is a direct or servo operated solenoid valve specially designed to t into CO2 transcritical refrigeration systems.
They can be applied in following applications:
• EVT 1.2 direct operated for oil return, pressure equalization/relief control, high pressure hot gas bypass/dump and hot gas defrost.
• EVT 2.0 and 3.0 servo operated for high pressure hot gas bypass/dump and hot gas defrost application.
EVT valves and coils are sold separately.
Features
• Direct and servo operated mini piston solenoid valve with compact construction
• Simple and fast mounting of Danfoss Clip-on coil
• Designed for media temperature up to 150°C
• Working pressure up to 140 bar with standard coils
• Copper solder connections for brazing
• Stainless steel connections for Swagelok
ttings
• Body material in ECO brass (lead free < 0.1%)
• Robust design ensures long lifetime
• Supplied in version normally closed (NC)
• In accordance with
RoHS IIREACHLVD and PED
AI383432144920en-000101
Features
EVT
EVT
Connection
Copper
Stainless steel
DN [mm]
1.2 – 3.0
1.2 – 3.0
Connection
ODF 3/8”
ODM 6mm
Max. working pressure [bar]
140
140
Function
NC
NC
Solenoid Valve, Type EVT
Portfolio overview
Table 1: Portfolio overview
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Valve housing
Cover
Armature assembly
Gasket
Armature spring
Seat plate
Coil O-ring
Solenoid Valve, Type EVT
Functions
Normally closed (NC)
Direct operated
EVT 1.2 is direct operated. This means that the valve can operate at 0bar dierential pressure.
Coil voltage disconnected (closed):
When the voltage to the coil is disconnected, the armature (3) with the seat plate (6) is pressed down against the valve orice by the closing spring (5) and inlet pressure. The valve will be closed for as long as the coil is disconnected.
Coil voltage connected (open):
The valve opens directly for full ow when the voltage is applied to coil, the armature (3) with seat plate is lifted clear of the valve orice. The valve will be open for as long as there is voltage to the coil.
Figure 1: Direct operated
Servo operated
EVT 2.0 and 3.0 is servo operated piston solenoid valves. The servo piston principle results in a fast operating and compact valve that can open against a high dierential pressure.
Coil voltage disconnected (closed):
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Valve housing
Cover
Armature assembly
Gasket
Armature spring
Seat plate
Piston assembly
Guide pin
Coil O-ring
Solenoid Valve, Type EVT
When the coil is disconnected, the armature (3) with seat plate (6) is pressed down against the pilot orice by the armature spring (8). Via the equalization orice in the piston (5), the pressure above the piston rises to the same value as the inlet pressure and the piston closes the main orice. The valve will be closed for as long as the coil is disconnected.
Coil voltage connected (open):
When current is applied to the coil, the armature (3) is drawn up into the magnetic eld and opens the pilot orice. This relieves the pressure above the piston (7), i.e. the space above the piston becomes connected to the outlet side of the valve. The dierential pressure between inlet and outlet sides then presses the piston away from the main orice and now the main orice opens for full ow. Therefore, a minimum dierential pressure of 2 bar is necessary to open the valve and 0.4 bar to keep it open.
Figure 2: Servo operated
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Refrigerants
R744 (CO2)
Oil
POE 60cST, 85cST (piston compressors); PAG 68cST, 100cST (piston and rotary compressors)
Media temperature range
-40 - 150 °C / -40 - 302 °F
Max. working pressure (PS/MWP)
140 bar / 2030.5 psi
Solenoid Valve, Type EVT
Media
Table 2: Media
NOTE:
• Media temperature of 0°C or higher when operating the valve for oil management lines.
• Danfoss recommends that a suitable lter or lter drier (< 40 microns) should be installed ahead of each solenoid valve to keep scale, solder material and other foreign dirt and particles out of the valve.
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A
1
2
3
4
5
6
7
1
2
3
4
5
6
7
MOPD and MWP
Country of origin
Point of contact
Serial number
Code number
Media temperature
Ambient temperature
068F0611 Max. media TEMP 150 °C / 302 °C Max. AMB TEMp 50 °C / 122°F MOPD 110 bar / 1595, 4psi PS 140 / SWP 2030, 5 MADE IN DENMARK Danfoss A/S 6430 Nordborg Denmark 068F0611F171D00001
A (2 : 1)
Type
Opening dierential pressure with standard coil ΔP [bar]
Min.
Max. (=MOPD) liquid
220V-230V 50Hz / 018F6176
EVT 1.2 NC
0
110
EVT 2.0 NC
2
110
EVT 3.0 NC
2
110
Pos. no.
Descriptions
Materials
1
Valve housing
ECO Brass
2
Cover
Stainless steel
3
Armature assembly
Stainless steel
4
Gasket
Copper
5
Spring
Stainless steel
6
Seat plate
PEEK7Piston
ECO Brass
8
Guide pin
Stainless steel
Solenoid Valve, Type EVT
Product specication
Technical data
Ambient temperature
-40°C to 50°C
Max. working pressure
140 bar with copper connections and stainless steel connections.
Flow capacity
• For Kv values please refer to the tables in Ordering.
• The Kv value of the water ow in [m3/h] at a pressure drop across valve of 1 bar, ρ = 1000 kg/m3.
Opening dierential pressure range
Table 3: MOPD
NOTE:
EVT 2.0 and 3.0 need 0.4 bar to keep open and can’t be used as relief valve if the dierential pressure is lower than
0.4 bar.
Valve selection based on capacity calculation
As for extended capacity calculations and valve selection based on capacities and refrigerants, please refer to Coolselector®2. Rated and extended capacities are calculated with Coolselector®2 calculation engine to ARI standards with the ASEREP equations based on laboratory measurements of selected valves.
Identication
Figure 3: Identication
Figure 4: Identication
Materials
Table 4: Materials
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8
0
m
m
[
3
,
2
i
n
]
4
3
m
m
[
1
,
7
i
n
]
15Ø mm
[0,6 in]
51 mm
[2 in]
1
3 Ø
m
m
[
1
/
2
i
n
]
6
5
m
m
[
2
,
6
i
n
]
17 mm
[0,7 in]
15 mm
[0,6 in]
6
5
m
m
[
2
,
9
i
n
]
51 mm
[2 in]
15 mm
[0,6 in]
6
m
m
[
1
/
4
i
n
]
8
0
m
m
[
3
,
2
i
n
]
17 mm [0,7 in]
4
3
m
m
[
1
,
7
i
n
]
15 mm
[0,6 in]
Type
Net weight without coil
[kg]
EVT 1.2
0.22 kg
EVT 2.0
0.24 kg
EVT 3.0
0.24 kg
Solenoid Valve, Type EVT
Dimension and Weight
Figure 5: EVT ODF
Figure 6: EVT ODM
Table 5: Dimension and weight
NOTE:
Net weight of coil 018F6176 is approx. 0.27 kg.
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Type
Connection size
Kv value [m3/h]
Code no.
Packing
ODF [in]
ODM [mm]
Copper
Stainless Steel
EVT 1.2
3/8
-
0.05
068F0600
Multi-pack
068F0625
I-pack
-
6
068F0622
Multi-pack
068F0626
I-pack
EVT 2.0
3/8
-
0.1
068F0601
Multi-pack
068F0627
I-pack
-
6
068F0621
Multi-pack
068F0628
I-pack
EVT 3.0
3/8
-
0.23
068F0611
Multi-pack
068F0629
I-pack
-
6
068F0620
Multi-pack
068F0630
I-pack
Type
Tambient
Supply voltage
Voltage variation
Frequency
Power consumption
Code no.
[°C]
[V]
[Hz]
BE230AS
-40T50 220
-15%, +10%
50
11 W
018F6176
230
-15%, +10%
50
12 W
Solenoid Valve, Type EVT
Ordering
Parts program
Coils
Table 6: Coils
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1.
2.
A B
1.
2.
A B C D E
Type
EVT 1.2
EVT 2.0 & 3.0
Seal Kit
068F0697
068F0697
Service Kit
068F0698
068F0699
1
2
B
A
Danfoss
068F0600_EX
1
2
A
B
C
D
E
Danfoss
068F0611_EX
Seal kit contains:
Coil O-ring Gasket
Service kit contains:
Spring Armature
Seal kit contains:
Coil O-ring Gasket
Service kit contains:
Spring Spring Guided pins Armature Piston
Solenoid Valve, Type EVT
Accessories
Spare parts kits
Table 7: Spare part kits
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File name
Document type
Document topic
Approval authority
033F0688
EU declaration
LVD, EMC
Danfoss
033F1035
EU declaration
PED
Danfoss
Solenoid Valve, Type EVT
Certicates, declarations and approvals
The list contains all certicates, declarations, and approvals for this product type. Individual code number may have some or all of these approvals, and certain local approvals may not appear on the list.
Some approvals may change over time. You can check the most current status at danfoss.com or contact your local Danfoss representative if you have any questions.
Valid approvals
Table 8: Valid approvals
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