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STF
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Danfoss STF, STF-H Data sheet

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Data Sheet
4-Way Reversing valves Type STF and STF-H
The 4-way valves are used in reversible applications such as heat pumps or reversible air conditioning units and chillers.
The 4-way valve allows an inversion of the refrigeration cycle, changing from cooling mode in summer to heating mode in winter.
Features
• Wide application range
including ammable refrigerants)
◦ many dierent connection diameters and
congurations
• High reliability
◦ unique design ◦ instantaneous changeover at minimum
pressure dierential
◦ mechanism to prevent incomplete
changeover
◦ Minimized leakage
• CE approved
AI356550649035en-000101en-000201
4-Way Reversing valves, Type STF and STF-H
Application
The cycle inversion is initiated by a small solenoid pilot valve, which pilots the movement of a slider, which changes the direction of the refrigerant. The valve is connected to the discharge and suction pipes.
The pilot valve ensures a very reliable changeover from cooling to heating mode, the changeover happens instantaneously with a minimum pressure dierential. The valve design also guarantees a minimum pressure drop and a very low risk of leakage.
Figure 1: HEATING CYCLE (Coil energized) Figure 2: COOLING CYCLE (Coil not energized)
© Danfoss | Climate Solutions | 2021.09 AI356550649035en-000101en-000201 | 2
1
2
3
4
5
6
Danfoss
80Z930
123456Discharge connection
Connection to evaporator/ condenser
Suction connection
Connection to condensor/ evaporator
Valve body
Slider
Parameter
STF and STF-H
Compatibility refrigerants
R22, R134a, R407A, R4070, R404A, R410A, R448A, R449A R32, R290, R454C, R454B, R452B (see safety note be­low)
Min. OPD
3 bar
Max. OPD
31 bar
Max. working pressure (PS/MWP)
45 bar Note! 49 bar for selected models. Please check Table 2: Ordering table for further information.
Refrigerant temperature range
–30 to 130 °C Note! 160 °C for selected models. Please check Table 2: Ordering table for further information.
Ambient temperature
–30 to 55 °C
4-Way Reversing valves, Type STF and STF-H
Product specication
Technical data
Table 1: Technical data
NOTE:
Special safety note for ammable refrigerants!
For countries where safety standards are not an indispensable part of the safety system Danfoss recommends the installer gets a third party approval of any system containing ammable refrigerant
Please refer to separate drawings of the STF and STF-H valves with special disclaimer regarding usage of ammable refrigerants. Please refer to separate document “Important Notice for usage of STF and STF-H valves with ammable refrigerants (No. S-FD001-1).
Design
Figure 3: Design
The valve is composed of three basic components:
• Pilot valve
• Main valve body, including valve slider
• Solenoid coil
© Danfoss | Climate Solutions | 2021.09 AI356550649035en-000101en-000201 | 3
4-Way Reversing valves, Type STF and STF-H
The 4-way valve slider is shifted by changes in dierential pressure in the valve which is actuated by the pilot solenoid valve. The valve slider is specially designed to prevent incomplete changeover and movement with minimum pressure dierential.
Dimension
Refer to separate drawings of models. - Contact danfoss for further information.
© Danfoss | Climate Solutions | 2021.09 AI356550649035en-000101en-000201 | 4
Model
Packing for‐
mat
Danfoss code
Capacity [kW]
(1)
Style
Discharge
Suction
Media tem‐
perature
MWP
R290/R410A
[in]
[in]
[°C]
[bar]
Danfoss
80Z931
STF-H0167
45
061L1348
4.8A5/16
3/8
130
45
STF-H0267
32
061L1349
9.5A3/8
1/2
130
45
STF-H0321
32
061L1350
9.5E1/2
5/8
130
45
STF-H0351
32
061L1351
13.7B1/2
5/8
130
45
STF-H0429
24
061L1352
18.2F1/2
3/4
130
45
STF-H0651
24
061L1353
25.1B1/2
3/4
130
45
STF-H0731
6
061L1354
31.2F3/4
7/8
130
45
STF-H0951
6
061L1355
38.12B3/4
7/8
160
49
STF-H0954
6
061L1356
38.12F7/8
11/8
160
49
STF-2028G
1
061L1357
41.8F11/8
13/8
160
49
STF-2525G
1
061L1358
63.2G11/8
13/8
160
49
STF-3017G
1
061L1362
89.4G11/8
15/8
160
49
STF-4017G
1
061L1359
125.5G15/8
15/8
160
49
STF-5017G
1
061L1360
161.3G15/8
2 1/2
160
49
STF-6009G
1
061L1361
265.8G15/8
2 3/8
160
49
STF and STF-H
coils
Old STF coils
New STF coils Old STF-H coils New STF-H coils
Type
Cable
length
[mm]
Rated voltage [V AC]
Code no.
STF-01AB500A1 600 24
STF-01AB503B1 1200 24
STF-01AJ504F1 1200 208 to 240
STF-01AJ504F1 1200 208 to 240
STF-01AJ504F1 1200 208 to 240
STF-01AJ506B1 600 220 to 240
STF-01AJ512D1 2000 220 to 240
STF-01AJ512D1 2000 220 to 240
STF-H01AJ1709A1(N- HV-83065) STF-H01AJ1736D1(N- HV-83346) STF-H01AJ1738A1(N-
STF-H01AJ1709A1 / 061L2219
-0.6m cable without connector
STF-H01AJ1738A1 / 061L2220
-2m cable without connector
061L2092
061L2038
061L2125
061L2094
061L2016
061L2093
061L2095
061L2074
4-Way Reversing valves, Type STF and STF-H
Ordering
Table 2: Ordering
(1)
(1)
Capacity is indicated for 0.1bar suction pressure drop and condition 54.5 CCT, 7.2 CET and 5K SH
Capacity is indicated for 0.1bar suction pressure drop and condition 54.5 CCT, 7.2 CET and 5K SH
Coils for STF and STF-H valves
Figure 4: Coils for STF and STF-H valves
STF and STF-H coils - Model split:
© Danfoss | Climate Solutions | 2021.09 AI356550649035en-000101en-000201 | 5
0.010
0.100
1.000
0.50 5.00 50.00 500.00
Suction press ure drop [bar]
Capaci ty [kW]
STF capacity chart R134A*
STF-H01**
STF-H02**
STF-H03**
STF-H035*
STF-H04**
STF-H065*
STF-H07**
STF-H09**
STF-20**G
STF-25**G
STF-30**G
STF-40**G
STF-50**G
STF-60**G
0.010
0.100
1.000
0.50 5.00 50.00 500.00
Su
on pre
ss u
re
d
ro
p [b
ar
]
Capacity [kW]
STF capacity chart R404A*
STF-H01**
STF-H02**
STF-H03**
STF-H035*
STF-H04**
STF-H065*
STF-H07**
STF-H09**
STF-20**G
STF-25**G
STF-30**G
STF-40**G
STF-50**G
STF-60**G
4-Way Reversing valves, Type STF and STF-H
• The old and new STF models uses the same coils.
• The old and mew STF-H Models uses the same coils.
• For STF-H models we currently only have 2 coil versions with Danfoss codes.
NOTE:
Refer to drawings of specic models for detailed technical specications and dimensions. Contact Danfoss for more information.
Capacity charts
Figure 5: STF capacity chart R134A
* Capacity calculated for CT 54.4 °C, ET 7.2 °C, SH 5K
Figure 6: STF capacity chart R404A
* Capacity calculated for CT 54.4 °C, ET 7.2 °C, SH 5K
© Danfoss | Climate Solutions | 2021.09 AI356550649035en-000101en-000201 | 6
0.010
0.100
1.000
0.50 5.00 50.00 500.00
Suct ion press ure drop [bar]
Capaci ty [kW]
STF capacity chart R407C*
STF-H01**
STF-H02**
STF-H03**
STF-H035*
STF-H04**
STF-H065*
STF-H07**
STF-H09**
STF-20**G
STF-25**G
STF-30**G
STF-40**G
STF-50**G
STF-60**G
0.010
0.100
1.000
0.50 5.00 50.00 500.00
Su on pressu
re d
ro
p [bar]
Capacity [kW]
STF capacity chart R410A*
STF-H01**
STF-H02**
STF-H03**
STF-H035*
STF-H04**
STF-H065*
STF-H07**
STF-H09**
STF-20**G
STF-25**G
STF-30**G
STF-40**G
STF-50**G
STF-60**G
4-Way Reversing valves, Type STF and STF-H
Figure 7: STF capacity chart R407C
* Capacity calculated for CT 54.4 °C, ET 7.2 °C, SH 5K
Figure 8: STF capacity chart R410A
* Capacity calculated for CT 54.4 °C, ET 7.2 °C, SH SK
© Danfoss | Climate Solutions | 2021.09 AI356550649035en-000101en-000201 | 7
0.010
0.100
1.000
0.50 5.00 50.00 500.00
Su on
p
re
ss u
re
drop
[bar]
Capa ci ty [kW]
STF capacity chart R448A*
STF-H01**
STF-H02**
STF-H03**
STF-H035*
STF-H04**
STF-H065*
STF-H07**
STF-H09**
STF-20**G
STF-25**G
STF-30**G
STF-40**G
STF-50**G
STF-60**G
0.010
0.100
1.000
0.50 5.00 50.00 500.00
Su
on
pressu
re
d
rop
[b
ar]
Capa ci ty [kW]
STF capacity chart R449A*
STF-H01**
STF-H02**
STF-H03**
STF-H035*
STF-H04**
STF-H065*
STF-H07**
STF-H09**
STF-20**G
STF-25**G
STF-30**G
STF-40**G
STF-50**G
4-Way Reversing valves, Type STF and STF-H
Figure 9: STF capacity chart R448A
* Capacity calculated for CT 54.4 °C, ET 7.2 °C, SH SK
Figure 10: STF capacity chart R449A
* Capacity calculated for CT 54.4 °C, ET 7.2 °C, SH SK
© Danfoss | Climate Solutions | 2021.09 AI356550649035en-000101en-000201 | 8
0.010
0.100
1.000
0.50 5.00 50.00 500.00
Suct ion press ure drop [bar]
Capaci ty [kW]
STF capacity chart R449A*
STF-H01**
STF-H02**
STF-H03**
STF-H035*
STF-H04**
STF-H065*
STF-H07**
STF-H09**
STF-20**G
STF-25**G
STF-30**G
STF-40**G
STF-50**G
STF-60**G
0.010
0.100
1.000
0.50 5.00 50.00 500.00
Suct ion press ure drop [bar]
Capacity [kW]
STF capacity chart R290*
STF-H01**
STF-H02**
STF-H03**
STF-H035*
STF-H04**
STF-H065*
STF-H07**
STF-H09**
STF-20**G
STF-25**G
STF-30**G
STF-40**G
STF-50**G
STF-60**G
4-Way Reversing valves, Type STF and STF-H
Figure 11: STF capacity chart R32
* Capacity calculated for CT 54.4 °C, ET 7.2 °C, SH SK
Figure 12: STF capacity chart R290
* Capacity calculated for CT 54.4 °C, ET 7.2 °C, SH SK
© Danfoss | Climate Solutions | 2021.09 AI356550649035en-000101en-000201 | 9
0.010
0.100
1.000
0.50 5.00 50.00 500.00
Suct ion press ure drop [bar]
Capacity [kW]
STF capacity chart R452B*
STF-H01**
STF-H02**
STF-H03**
STF-H035*
STF-H04**
STF-H065*
STF-H07**
STF-H09**
STF-20**G
STF-25**G
STF-30**G
STF-40**G
STF-50**G
STF-60**G
0.010
0.100
1.000
0.50 5.00 50.00 500.00
Suct ion press ure drop [ba r]
Capaci ty [kW]
STF capacity chart R454B*
STF-H01**
STF-H02**
STF-H03**
STF-H035*
STF-H04**
STF-H065*
STF-H07**
STF-H09**
STF-20**G
STF-25**G
STF-30**G
STF-40**G
STF-50**G
STF-60**G
4-Way Reversing valves, Type STF and STF-H
Figure 13: STF capacity chart R452B
* Capacity calculated for CT 54.4 °C, ET 7.2 °C, SH SK
Figure 14: STF capacity chart R454B
* Capacity calculated for CT 54.4 °C, ET 7.2 °C, SH SK
© Danfoss | Climate Solutions | 2021.09 AI356550649035en-000101en-000201 | 10
0.010
0.100
1.000
0.50 5.00 50.00 500.00
Suct ion press ure drop [ba r]
Capaci ty [kW]
STF capacity chart R454B*
STF-H01**
STF-H02**
STF-H03**
STF-H035*
STF-H04**
STF-H065*
STF-H07**
STF-H09**
STF-20**G
STF-25**G
STF-30**G
STF-40**G
STF-50**G
STF-60**G
0.010
0.100
1.000
0.50 5.00 50.00 500.00
Suct ion press ure drop [bar]
Capaci ty [kW]
STF capacity chart R454C*
STF-H01**
STF-H02**
STF-H03**
STF-H035*
STF-H04**
STF-H065*
STF-H07**
STF-H09**
STF-20**G
STF-25**G
STF-30**G
STF-40**G
STF-50**G
STF-60**G
4-Way Reversing valves, Type STF and STF-H
Figure 15: STF capacity chart R454B
* Capacity calculated for CT 54.4 °C, ET 7.2 °C, SH SK
Figure 16: STF capacity chart R454C
* Capacity calculated for CT 54.4 °C, ET 7.2 °C, SH SK
NOTE:
For capacity charts for other refrigerants, please contact Danfoss.
© Danfoss | Climate Solutions | 2021.09 AI356550649035en-000101en-000201 | 11
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