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REFRIGERATION AND AIR CONDITIONING
Thermostatic Expansion valves,type TUA/TUAE
Technical leafl et
2 RD1AC502 © Danfoss A/S (RC-CMS / HBS), 02 - 2004
Technical leaflet Thermostatic expansion valves, type TUA/TUAE
Contents Page
Introduction .................................................................................................................................................................................3
Features .........................................................................................................................................................................................3
Standard range ...........................................................................................................................................................................3
Technical data .............................................................................................................................................................................4
MOP valves ...................................................................................................................................................................................4
Identification ...............................................................................................................................................................................4
Ordering ........................................................................................................................................................................................5
Capacity - R22 ..............................................................................................................................................................................7
Capacity - R134a .........................................................................................................................................................................9
Capacity - R404A/R507 ......................................................................................................................................................... 10
Capacity - R407C ..................................................................................................................................................................... 12
Capacity - R410A ..................................................................................................................................................................... 14
Design/Function ..................................................................................................................................................................... 15
Dimensions and weight ....................................................................................................................................................... 15
Technical leaflet Thermostatic expansion valves, type TUA/TUAE
© Danfoss A/S (RC-CMS / HBS), 02 - 2004 RD1AC502 3
Introduction TUA/TUAE valves are made of stainless steel and are therefore very suitable for refrigeration systems in the food industry.
TUA/TUAE valves are available with interchangeable orifice assembly in straightway versions.
TUA/TUAE has been specially developed for soldering into hermetic refrigeration systems.
TUA/TUAE valves can be used in many different forms of refrigeration systems, for example:
Traditional refrigeration systems
Heat pump systems
Air conditioning units
Refrigeration appliances
Liquid coolers
Ice cube machines
Mobile refrigeration systems
Features - high connection strength and tightness - capillary tube joints of high strength and vibration resistance
Laser-welded, stainless steel thermostatic diaphragm element - optimum function - long diaphragm life - high pressure resistance
Stainless steel double contact bulb - simple and fast installation - good heat transfer from pipe to bulb
Adjustable superheat - accurate setting - adjustable in operation
Available with MOP (Max. Operating Pressure)
Wide range of valves
Interchangeable filter for easy cleaning
Interchangeable orifice assembly designed for: - Easy mounting - Optimized tightness
Bimetal connections - Simple, fast soldering without the need for wet cloth or refrigeration pliers.
Refrigerants R22, R134a, R404A, R407C, R507, and future refrigerants
Capacities from 0.6 to 16 kW (0.17 to 4.5 TR) for R22 - Large capacity range in small steps
Stable regulation
Biflow function
Compact design - small dimensions and low weight
Stainless steel, solder version
The standard range can be supplied in the following versions:Range N –40 to +10°C, without MOPRange N −40 to +10°C, MOP +15°CRange NM −40 to − 5°C, MOP 0°CRange B −60 to −25°C, without MOPRange B −60 to −25°C, MOP −20°CValves for special temperature ranges can be supplied.
Static superheat (SS) (R22, R134a, R404A and R407C):Valves without MOP 5 KValves with MOP 4 K
Standard range Static superheat (SS) (R507):Valves without MOP 6.4 KValves with MOP 5.4 K
Capillary tube length 1.5 m
Connections:Inlet 1/4 in./6 mm 3/8 in./10 mmOutlet 1/2 in./12 m
4 RD1AC502 © Danfoss A/S (RC-CMS / HBS), 02 - 2004
Technical leaflet Thermostatic expansion valves, type TUA/TUAE
MOP-points
When MOP valves are used, to avoid charge migration the bulb temperature must always be lower than the thermostatic element temperature.
MOP valves
Max. bulb temperature 100°C
Max. valve body temp. 120°C, short-lived peak 150°C
Permissibleworking pressure PS = 34 bar
Max. test pressure p’ = 37.5 bar
Biflow operationWith flow in the opposite direction, the rated capacity is reduced by up to 15%.TUAE with orifice 9, TUA valves (internal equalisation) and valves with MOP cannot be used for biflow operation.
Technical data
Main valve data is given on the element (fig. 1), on the valve body (fig. 2) and on the bottom of the orifice assembly (fig. 3).
Example valve bodyTUAE = Type (E = external pressure equalisation)068U2214 = Code numberR134a = RefrigerantMOP 55 / +15°C = MOP-point in psig / °C−40 / +10°C = Evaporating temperature range in °C−40 / +50°F = Evaporating temperature range in °FPS 34 bar/ MWP 500 psig = Max. working pressure in bar/psig104B = Date marking (week 10, year 2004, weekday B = Tuesday)⇒ = Normal flow directionin. = Connection in inches (mm = millimetres)
Example orifice assemblyTU = Valve type5 = Orifice number068U1035 = Code no., orifice assembly incl. filter and gasket104 = Date marking (Week 10, Year 2004)
Identification
Fig. 1 Power element
Fig. 2 Valve body
Fig. 3 Orifice assembly
Refrigerant
Range N−40 → +10°C
Range NM−40 → −5°C
Range B−60 → −25°C
MOP point for evaporating temperature te and evaporating pressure pe1)
te = +15°C/+60°F te = 0°C/+32°F te = −20°C/−4°F
R22 pe = 100 psig/6.9 bar pe = 60 psig/4.0 bar pe = 20 psig/1.5 bar
R134a pe = 55 psig/3.9 bar pe = 30 psig/1.9 bar
R404A/R507 pe = 120 psig/8.4 bar pe = 75 psig/5.0 bar pe = 30 psig/2.0 bar
R407C pe = 95 psig/6.6 bar pe = 50 psig/3.6bar pe = 20 psig/1.4 bar
1) pe in bar gauge
Technical leaflet Thermostatic expansion valves, type TUA/TUAE
© Danfoss A/S (RC-CMS / HBS), 02 - 2004 RD1AC502 5
Ordering, components with solder x solder connections
Thermostatic element, without orifice and filter, with bulb strap
Refrigerant Valve typePressure
equalization1)
Capillary tubeConnections Code no.
Inlet x outletRange N
–40 → +10°CRange NM
–40 → –5°CRange B
–60→ –25°C
m in. mm Without MOP MOP +15 °C MOP 0 °C Without MOP MOP –20°C
R22
TUATUATUATUA
Int.Int.Int.Int.
1.51.51.51.5
1/4 x 1/2
3/8 x 1/2
6 x 12
10 x 12
068U2234068U2230068U2235068U2231
068U2242068U2238068U2243068U2239
TUAETUAETUAETUAE
Ext. 1/4 in.Ext. 6 mmExt. 1/4 in.Ext. 6 mm
1.51.51.51.5
1/4 x 1/2
3/8 x 1/2
6 x 12
10 x 12
068U2236068U2232068U2237068U2233
068U2244068U2240068U2245068U2241
R134a
TUATUATUATUA
Int.Int.Int.Int.
1.51.51.51.5
1/4 x 1/2
3/8 x 1/2
6 x 12
10 x 12
068U2204068U2200068U2205068U2201
068U2212068U2208068U2213068U2209
TUAETUAETUAETUAE
Ext. 1/4 in.Ext. 6 mmExt. 1/4 in.Ext. 6 mm
1.51.51.51.5
1/4 x 1/2
3/8 x 1/2
6 x 12
10 x12
068U2206068U2202068U2207068U2203
068U2214068U2210068U2215068U2211
R404AR507
TUATUATUATUA
Int.Int.Int.Int.
1.51.51.51.5
1/4 x 1/2
3/8 x 1/2
6 x 12
10 x 12
068U2284068U2280068U2285068U2281
068U2292068U2288068U2293068U2289
068U2300068U2296068U2301068U2297
068U2308068U2304068U2309068U2305
068U2316068U2312068U2317068U2313
TUAETUAETUAETUAE
Ext. 1/4 in.Ext. 6 mmExt. 1/4 in.Ext. 6 mm
1.51.51.51.5
1/4 x 1/2
3/8 x 1/2
6 x 12
10 x 12
068U2286068U2282068U2287068U2283
068U2294068U2290068U2295068U2291
068U2302068U2298068U2303068U2299
068U2310068U2306068U2311068U2307
068U2318068U2314068U2319068U2315
R407C
TUATUATUATUA
Int.Int.Int.Int.
1.51.51.51.5
1/4 x 1/2
3/8 x 1/2
6 x 12
10 x 12
068U2324068U2320068U2325068U2321
068U2332068U2328068U2333068U2329
TUAETUAETUAETUAE
Ext. 1/4 in.Ext. 6 mmExt. 1/4 in.Ext. 6 mm
1.51.51.51.5
1/4 x 1/2
3/8 x 1/2
6 x 12
10 x 12
068U2326068U2322068U2327068U2323
068U2334068U2330068U2335068U2331
R22, R134a, R404A, R407C, R507
6 RD1AC502 © Danfoss A/S (RC-CMS / HBS), 02 - 2004
Technical leaflet Thermostatic expansion valves, type TUA/TUAE
1) Rated capacity Qnom. is based on: Evaporating temperature te = +5°C for range N and – 30°C for
range B Condensing temperature tc = +32°C Refrigerant liquid temperature tl = +28°C Opening superheat OS = 4 K
Ordering (continued)
Spare partsGasket (24 pcs.): 068U0015Note: to ensure tightness the orifice gasket must be exchanged each time the orifice assembly is unscrewed.Filter (24 pcs.): 068U0016
Range B: –60 → –25°C
Orifice assembly with filter and gasket. Range N: –40 → +10°C
Orifice no.Rated capacity in kW1) Rated capacity in tons (TR)1)
Code no.R22 R134a R404A R407C R507 R22 R134a R404A R407C R507
0 0.60 0.47 0.47 0.63 0.45 0.17 0.13 0.13 0.18 0.13 068U1030
1 0.9 0.7 0.70 0.92 0.66 0.25 0.19 0.19 0.26 0.19 068U1031
2 1.3 1.0 1.0 1.4 1.0 0.36 0.28 0.28 0.38 0.27 068U1032
3 1.8 1.4 1.4 1.9 1.3 0.50 0.39 0.39 0.53 0.38 068U1033
4 2.6 2.1 2.1 2.8 2.0 0.75 0.59 0.60 0.80 0.57 068U1034
5 3.5 2.7 2.8 3.8 2.7 1.00 0.78 0.79 1.1 0.76 068U1035
6 5.3 4.1 4.2 5.7 4.0 1.5 1.2 1.2 1.6 1.1 068U1036
7 7.0 5.5 5.6 7.5 5.3 2.0 1.6 1.6 2.1 1.5 068U1037
8 11.0 8.2 8.4 11.0 8.0 3.0 2.3 2.4 3.2 2.3 068U1038
9 16.0 12.0 12.0 17.0 12.0 4.5 3.5 3.5 4.8 3.4 068U1039
Orifice no.
Rated capacity in kW1) Rated capacity in tons (TR)1)
Code no.R22 R404A R407C R507 R22 R404A R407C R507
0 0.52 0.36 0.46 0.39 0.15 0.10 0.13 0.11 068U1030
1 0.68 0.50 0.58 0.53 0.19 0.14 0.16 0.15 068U1031
2 0.85 0.64 0.70 0.70 0.24 0.18 0.20 0.20 068U1032
3 1.2 0.89 1.0 1.0 0.34 0.25 0.28 0.28 068U1033
4 1.8 1.3 1.4 1.4 0.50 0.37 0.41 0.41 068U1034
5 2.3 1.8 1.9 1.9 0.66 0.50 0.55 0.55 068U1035
6 3.5 2.7 2.9 2.9 1.0 0.75 0.82 0.82 068U1036
7 4.7 3.5 3.9 3.9 1.3 1.0 1.1 1.1 068U1037
8 7.1 5.3 5.8 5.8 2.0 1.5 1.6 1.7 068U1038
9 10.4 7.8 8.5 8.6 2.9 2.2 2.4 2.4 068U1039
Technical leaflet Thermostatic expansion valves, type TUA/TUAE
© Danfoss A/S (RC-CMS / HBS), 02 - 2004 RD1AC502 7
Capacity
Correction factor for subcooling ∆tsub
Note:Insufficient subcooling can produce flash gas.
Correction for subcooling ∆tsub
The evaporator capacity used must be corrected if subcooling deviates from 4 K.The corrected capacity can be obtained by dividing the evaporator capacity by the correction factor given below.
Since the expansion valve capacity must be equal to or slightly more than the corrected evaporator capacity of 2.7 kW, a TUB/TUBE with orifice 5 and a table capacity of 2.8 kW would be a suitable choice.
Refrigerant = R22Evaporating temperature te = −10°CPressure drop in valve ∆p = 10 barSubcooling ∆tsub = 15 KEvaporator capacity = 3 kWCorrection value (table) = 1.11The corrected evaporator capacity thus becomes 3 divided by 1.11 = 2.7 kW
Selection example
R22Capacity in kW for range N = −40 → +10°C and opening superheat OS = 4 K
Valve typeOrifice
no.Pressure drop across valve ∆p bar Pressure drop across valve ∆p bar
2 4 6 8 10 12 14 16 2 4 6 8 10 12 14 16
Evaporating temperature +10°C Evaporating temperature 0°C
TU
0123456789
0.420.610.91.21.82.43.74.97.3
10.9
0.530.791.21.62.43.24.96.59.6
14.5
0.600.891.31.82.83.75.67.5
11.216.7
0.651.01.52.03.14.16.18.2
12.218.2
0.681.01.62.13.24.36.58.6
12.919.3
0.701.01.62.23.44.56.79.0
13.420.0
0.711.11.72.33.54.66.99.2
13.720.5
0.721.11.72.33.54.77.19.4
13.920.9
0.400.550.731.01.52.03.14.16.19.1
0.500.711.01.32.02.74.05.48.0
12.1
0.560.801.11.52.33.14.66.29.2
13.8
0.600.861.21.72.53.45.06.7
10.115.0
0.630.911.31.82.73.55.37.1
10.615.9
0.650.931.31.82.83.75.57.4
11.016.4
0.670.951.41.92.83.85.77.6
11.316.8
0.670.961.41.92.83.85.87.7
11.517.1
Evaporating temperature –10°C Evaporating temperature –20°C
TU
0123456789
0.360.470.600.81.21.72.53.35.07.4
0.460.620.781.11.62.23.24.36.59.7
0.510.700.891.31.92.53.75.07.5
11.1
0.550.751.01.42.02.74.05.48.1
12.0
0.570.791.01.42.12.84.35.78.5
12.6
0.590.811.11.52.22.94.45.98.8
13.1
0.600.821.11.52.23.04.56.09.0
13.3
0.610.831.11.52.33.04.66.19.1
13.5
0.400.510.610.91.31.72.53.45.17.6
0.450.570.701.01.51.92.93.95.88.6
0.480.620.761.11.62.13.14.26.39.3
0.500.650.791.11.62.23.34.46.69.7
0.520.670.821.21.72.33.44.56.8
10.1
0.530.680.841.21.72.33.54.67.0
10.3
0.530.690.851.21.82.33.54.77.1
10.4
Evaporating temperature –30°C Evaporating temperature –40°C
TU
0123456789
0.340.390.470.661.01.31.92.63.95.7
0.380.450.530.741.11.52.22.94.46.5
0.400.480.570.801.21.62.43.24.87.0
0.420.510.600.841.21.72.53.35.07.3
0.440.520.620.871.31.72.53.45.17.5
0.440.530.630.881.31.72.63.55.27.7
0.450.540.630.891.31.82.63.55.37.7
0.310.330.390.550.801.11.62.13.24.7
0.330.360.420.590.861.21.72.33.55.1
0.340.380.440.610.901.21.82.43.65.3
0.350.390.450.630.921.21.82.53.75.5
0.360.390.460.640.941.31.92.53.85.5
0.360.400.460.650.951.31.92.53.85.6
∆tsub 4 K 10 K 15 K 20 K 25 K 30 K 35 K 40 K 45 K 50 K
Correction factor
1.00 1.06 1.11 1.15 1.2 1.25 1.3 1.35 1.39 1.44
8 RD1AC502 © Danfoss A/S (RC-CMS / HBS), 02 - 2004
Technical leaflet Thermostatic expansion valves, type TUA/TUAE
Capacity (continued)
Capacity in kW for range B = −60 → −25°C and opening superheat OS = 4 K R22Valve type
Orificeno.
Pressure drop across valve ∆p bar Pressure drop across valve ∆p bar
2 4 6 8 10 12 14 16 2 4 6 8 10 12 14 16
Evaporating temperature –25°C Evaporating temperature –30°C
TU
0123456789
0.360.480.610.851.31.72.53.45.17.6
0.450.620.791.101.62.23.34.46.69.7
0.500.690.891.251.92.53.75.07.5
11.0
0.540.740.961.342.02.74.05.48.0
11.9
0.560.771.011.412.12.84.25.68.4
12.4
0.580.791.041.452.12.94.35.88.7
12.8
0.590.811.061.482.22.94.45.98.9
13.1
0.590.811.071.502.23.04.56.08.9
13.2
0.330.420.520.731.11.42.12.94.36.4
0.420.540.670.931.41.92.83.75.68.2
0.460.610.751.11.62.13.14.26.39.3
0.490.660.811.11.72.23.44.56.8
10.0
0.520.680.851.21.82.43.54.77.1
10.4
0.530.700.881.21.82.43.64.97.3
10.7
0.540.710.891.31.82.53.74.97.4
10.9
0.540.720.901.31.92.53.75.07.5
11.0
Evaporating temperature –40°C Evaporating temperature –50°C
TU
0123456789
0.270.310.360.510.751.01.52.03.04.5
0.340.390.460.650.961.31.92.63.95.7
0.370.440.520.731.11.42.22.94.46.4
0.400.470.560.791.21.62.33.14.76.8
0.420.500.590.821.21.62.43.24.97.1
0.430.510.600.851.21.72.53.35.07.3
0.430.520.610.861.31.72.53.45.17.5
0.440.520.620.871.31.72.63.45.27.5
0.200.210.250.350.510.681.01.42.13.0
0.250.270.310.440.650.871.31.72.63.8
0.280.300.350.500.720.971.41.92.94.3
0.300.320.380.530.771.01.52.13.14.6
0.310.340.390.550.811.11.62.23.34.8
0.320.350.400.570.831.11.72.23.44.9
0.330.350.410.580.841.11.72.33.45.0
0.330.350.410.580.851.11.72.33.45.0
Evaporating temperature –60°C
TU
0123456789
0.140.140.160.230.340.450.670.911.42.0
0.170.180.210.290.430.570.851.11.72.5
0.190.200.230.330.480.640.951.31.92.8
0.210.220.250.350.510.681.011.42.13.0
0.210.220.260.360.530.711.051.42.13.1
0.220.230.260.370.540.731.081.52.23.2
0.220.230.270.380.550.741.091.52.23.2
0.220.230.270.380.550.741.101.52.23.2
Correction factor for subcooling ∆tsub
Note:Insufficient subcooling can produce flash gas.
Correction for subcooling ∆tsub
The evaporator capacity used must be corrected if subcooling deviates from 4 K.The corrected capacity can be obtained by dividing the evaporator capacity by the correction factor given below.
∆tsub 4 K 10 K 15 K 20 K 25 K 30 K 35 K 40 K 45 K 50 K
Correction factor
1.00 1.06 1.11 1.15 1.2 1.25 1.3 1.35 1.39 1.44
Technical leaflet Thermostatic expansion valves, type TUA/TUAE
© Danfoss A/S (RC-CMS / HBS), 02 - 2004 RD1AC502 9
Capacity (continued)
Correction factor for subcooling ∆tsub
Note:Insufficient subcooling can produce flash gas.
Correction for subcooling ∆tsub
The evaporator capacity used must be corrected if subcooling deviates from 4 K.The corrected capacity can be obtained by dividing the evaporator capacity by the correction factor given below.
∆tsub 4 K 10 K 15 K 20 K 25 K 30 K 35 K 40 K 45 K 50 K
Correction factor
1.00 1.08 1.13 1.19 1.25 1.31 1.37 1.42 1.48 1.54
Capacity in kW for range N = −40 → +10°C and opening superheat OS = 4 K R134aValve type
Orificeno.
Pressure drop across valve ∆p bar Pressure drop across valve ∆p bar
2 4 6 8 10 12 14 16 2 4 6 8 10 12 14 16
Evaporating temperature +10°C Evaporating temperature 0°C
TU
0123456789
0.380.570.821.11.72.33.44.66.8
10.2
0.460.691.11.42.22.94.45.98.7
13.1
0.500.761.21.62.53.34.96.69.8
14.6
0.530.791.21.72.63.55.27.0
10.315.5
0.540.811.31.82.73.65.47.2
10.615.9
0.540.811.31.82.73.65.57.2
10.816.0
0.350.500.660.921.41.82.83.75.58.3
0.420.610.841.21.82.33.54.77.0
10.4
0.460.660.931.31.92.63.95.27.8
11.5
0.480.690.981.42.02.74.15.58.2
12.2
0.490.701.01.42.12.84.25.68.4
12.4
0.490.711.01.42.12.84.35.78.5
12.5
Evaporating temperature –10°C Evaporating temperature –20°C
TU
0123456789
0.310.410.510.711.11.42.12.84.36.3
0.370.510.640.891.31.82.73.55.37.9
0.400.550.700.981.52.02.93.95.98.7
0.420.580.741.01.52.13.14.16.29.1
0.430.580.751.11.62.13.14.26.39.3
0.430.580.761.11.62.13.24.26.39.3
0.310.390.470.650.961.31.92.63.95.7
0.340.430.510.721.051.42.12.84.36.2
0.350.440.530.751.101.52.23.04.46.5
0.350.450.540.761.121.52.23.04.56.6
0.350.450.540.761.11.52.23.04.56.6
Evaporating temperature –30°C Evaporating temperature –40°C
TU
0123456789
0.250.280.320.460.670.901.31.82.74.0
0.270.300.350.500.730.981.52.03.04.3
0.280.320.370.520.761.021.52.03.14.5
0.280.320.370.530.771.031.52.13.14.5
0.280.320.370.520.761.01.52.13.14.5
0.180.190.220.310.450.610.901.21.82.7
0.190.210.240.340.490.660.971.32.02.9
0.200.210.250.350.500.681.01.42.13.0
0.200.210.250.350.510.681.01.42.13.0
0.200.210.250.350.510.681.01.42.13.0
10 RD1AC502 © Danfoss A/S (RC-CMS / HBS), 02 - 2004
Technical leaflet Thermostatic expansion valves, type TUA/TUAE
Capacity (continued)
Correction factor for subcooling ∆tsub
Note:Insufficient subcooling can produce flash gas.
Correction for subcooling ∆tsub
The evaporator capacity used must be corrected if subcooling deviates from 4 K.The corrected capacity can be obtained by dividing the evaporator capacity by the correction factor given below.
∆tsub 4 K 10 K 15 K 20 K 25 K 30 K 35 K 40 K 45 K 50 K
Correction factor
1.00 1.1 1.2 1.29 1.37 1.46 1.54 1.63 1.7 1.78
Capacity in kW for range N = −40 → +10°C and opening superheat OS = 4 K R404A/R507Valve type
Orificeno.
Pressure drop across valve ∆p bar Pressure drop across valve ∆p bar
2 4 6 8 10 12 14 16 2 4 6 8 10 12 14 16
Evaporating temperature +10°C Evaporating temperature 0°C
TU
0123456789
0.320.470.700.961.52.02.93.95.88.8
0.400.600.911.21.92.53.85.17.5
11.3
0.440.681.01.42.12.84.35.78.4
12.7
0.460.691.11.52.33.04.56.09.0
13.5
0.460.701.11.52.33.14.76.29.2
13.8
0.460.701.11.52.33.14.76.29.2
13.9
0.450.681.11.52.33.14.66.19.1
13.7
0.440.661.11.52.23.04.56.08.9
13.39
0.310.440.600.831.31.72.53.45.07.5
0.390.560.771.11.62.23.24.36.59.6
0.420.610.871.21.82.43.64.87.2
10.8
0.440.640.921.31.92.63.85.17.6
11.4
0.440.640.941.32.02.63.95.27.8
11.7
0.440.640.941.52.02.63.95.37.8
11.7
0.430.630.931.31.92.63.95.27.7
11.5
0.420.610.901.31.92.53.85.07.5
11.2
Evaporating temperature –10°C Evaporating temperature –20°C
TU
0123456789
0.290.390.500.701.01.42.12.84.26.2
0.360.500.640.891.31.82.73.65.37.9
0.390.540.710.991.52.03.04.05.98.8
0.400.570.751.01.62.13.14.26.39.3
0.410.570.761.11.62.13.24.36.49.5
0.410.570.761.11.62.13.24.36.49.5
0.400.560.751.11.62.13.14.26.39.3
0.390.540.731.01.52.03.14.16.19.0
0.320.410.510.711.11.42.12.84.36.3
0.350.460.560.791.21.62.33.14.76.9
0.360.480.590.831.21.62.43.34.97.3
0.360.480.600.841.21.72.53.35.07.4
0.360.480.600.841.21.72.53.35.07.4
0.350.470.590.821.21.62.43.34.97.2
0.340.450.570.801.21.62.43.24.87.0
Evaporating temperature –30°C Evaporating temperature –40°C
TU
0123456789
0.30.360.430.600.891.21.82.43.65.3
0.310.380.450.630.931.21.92.53.75.5
0.310.380.450.640.941.31.92.53.85.5
0.310.380.450.630.931.21.92.53.85.5
0.30.370.440.620.911.21.82.43.75.4
0.290.360.430.600.881.21.82.43.65.2
0.240.270.320.450.650.881.31.82.63.9
0.250.280.330.460.680.911.41.82.74.0
0.250.280.330.470.680.911.41.82.84.0
0.250.280.330.460.670.901.31.82.74.0
0.240.270.320.450.660.881.31.82.73.9
0.230.260.310.430.630.851.31.72.63.7
Technical leaflet Thermostatic expansion valves, type TUA/TUAE
© Danfoss A/S (RC-CMS / HBS), 02 - 2004 RD1AC502 11
Capacity (continued)
Correction factor for subcooling ∆tsub
Note:Insufficient subcooling can produce flash gas.
Correction for subcooling ∆tsub
The evaporator capacity used must be corrected if subcooling deviates from 4 K.The corrected capacity can be obtained by dividing the evaporator capacity by the correction factor given below.
Capacity in kW for range B = −60 → −25°C and opening superheat OS = 4 K R404A/R507Valve type
Orificeno.
Pressure drop across valve ∆p bar Pressure drop across valve ∆p bar
2 4 6 8 10 12 14 16 2 4 6 8 10 12 14 16
Evaporating temperature –25°C Evaporating temperature –30°C
TU
0123456789
0.300.410.530.741.11.52.22.94.46.5
0.360.510.660.921.41.82.83.75.58.2
0.390.550.731.011.52.03.04.16.19.0
0.400.560.761.061.62.13.24.26.39.4
0.400.570.771.071.62.13.24.36.49.5
0.400.560.771.071.62.13.24.36.49.4
0.390.550.751.041.62.13.14.26.39.2
0.380.530.731.011.52.03.04.06.18.9
0.280.360.450.641.01.31.92.53.85.6
0.330.450.570.791.21.62.43.24.77.0
0.360.490.620.871.31.72.63.55.27.7
0.370.510.650.911.31.82.73.65.48.0
0.370.510.650.911.41.82.73.65.58.1
0.370.500.650.911.31.82.73.65.48.0
0.360.480.640.891.31.82.63.55.37.8
0.350.470.610.861.31.72.63.45.17.5
Evaporating temperature –40°C Evaporating temperature –50°C
TU
0123456789
0.280.340.400.570.831.11.72.23.44.9
0.300.370.440.620.911.21.82.43.75.4
0.300.380.450.640.941.31.92.53.85.6
0.310.380.460.640.941.31.92.53.85.6
0.300.380.450.630.931.31.92.53.85.5
0.290.370.440.620.911.21.82.43.75.4
0.280.350.420.590.871.21.82.43.55.2
0.220.240.270.390.570.761.11.52.33.3
0.230.250.300.420.610.821.21.62.53.6
0.240.260.310.430.630.841.31.72.63.7
0.240.260.310.430.630.841.31.72.63.7
0.230.260.300.420.620.831.21.72.53.7
0.220.250.290.410.600.811.21.62.43.5
0.210.240.280.390.570.771.21.52.33.4
Evaporating temperature –60°C
TU
0123456789
0.160.170.190.270.400.530.791.11.62.3
0.160.170.200.280.410.550.811.11.72.4
0.160.170.200.280.410.550.811.11.72.4
0.160.170.190.270.400.530.791.11.62.3
0.150.160.190.260.380.510.761.01.62.3
0.150.150.180.250.360.490.731.01.52.1
∆tsub 4 K 10 K 15 K 20 K 25 K 30 K 35 K 40 K 45 K 50 K
Correction factor
1.00 1.1 1.2 1.29 1.37 1.46 1.54 1.63 1.7 1.78
12 RD1AC502 © Danfoss A/S (RC-CMS / HBS), 02 - 2004
Technical leaflet Thermostatic expansion valves, type TUA/TUAE
Capacity (continued)
Correction factor for subcooling ∆tsub
Note:Insufficient subcooling can produce flash gas.
Correction for subcooling ∆tsub
The evaporator capacity used must be corrected if subcooling deviates from 4 K.The corrected capacity can be obtained by dividing the evaporator capacity by the correction factor given below.
∆tsub 4 K 10 K 15 K 20 K 25 K 30 K 35 K 40 K 45 K 50 K
Correction factor
1.00 1.08 1.14 1.21 1.27 1.33 1.39 1.45 1.51 1.57
Capacity in kW for range N = −40 → +10°C and opening superheat OS = 4 K R407CValve type
Orificeno.
Pressure drop across valve ∆p bar Pressure drop across valve ∆p bar
2 4 6 8 10 12 14 16 2 4 6 8 10 12 14 16
Evaporating temperature +10°C Evaporating temperature 0°C
TU
0123456789
0.430.630.901.21.92.53.85.07.5
11.3
0.540.811.21.62.53.35.06.69.9
14.8
0.600.901.41.92.83.85.77.6
11.216.9
0.640.961.52.03.14.16.18.2
12.218.2
0.670.991.52.13.24.26.48.6
12.719.0
0.681.011.62.23.34.46.68.8
13.019.5
0.681.021.62.23.34.46.78.9
13.219.7
0.681.011.62.23.34.46.78.9
13.219.7
0.410.560.81.01.62.13.14.26.39.3
0.510.731.01.42.12.74.15.48.2
12.2
0.560.811.11.52.33.14.66.29.3
13.8
0.600.861.21.72.53.35.06.79.9
14.8
0.620.891.21.72.63.55.26.9
10.415.4
0.630.901.31.82.73.55.37.1
10.615.8
0.630.911.31.82.73.65.47.2
10.715.9
0.630.901.31.82.73.65.47.2
10.715.9
Evaporating temperature –10°C Evaporating temperature –20°C
TU
0123456789
0.370.480.600.841.31.72.53.45.07.5
0.460.620.781.11.62.23.24.36.59.6
0.510.700.881.21.82.43.74.97.4
10.9
0.540.740.941.32.02.63.95.27.9
11.6
0.550.760.981.42.02.74.15.58.2
12.1
0.560.771.001.42.12.84.25.68.4
12.3
0.570.771.011.42.12.84.25.68.4
12.4
0.560.771.011.42.12.84.25.68.4
12.4
0.330.390.470.660.981.31.92.63.95.8
0.400.500.600.841.31.72.53.35.07.4
0.440.560.680.951.41.92.83.75.78.3
0.470.600.721.01.52.03.04.06.08.9
0.480.620.751.11.62.13.14.16.29.2
0.490.630.761.11.62.13.24.26.49.3
0.490.630.771.11.62.13.24.26.49.4
0.490.630.761.11.62.13.24.26.49.3
Evaporating temperature –30°C Evaporating temperature –40°C
TU
0123456789
0.260.380.450.630.931.31.92.53.85.5
0.290.430.500.711.01.42.12.84.26.2
0.310.450.530.751.11.52.23.04.56.5
0.320.470.550.781.11.52.33.14.66.7
0.320.480.560.791.21.62.33.14.76.8
0.320.480.560.791.21.62.33.14.76.9
0.310.470.560.791.21.52.33.14.76.8
0.290.310.360.510.751.01.52.03.04.4
0.310.330.380.540.791.11.62.13.24.7
0.320.340.400.560.811.11.62.23.34.8
0.320.340.400.560.821.11.62.23.34.9
0.320.350.400.560.821.11.62.23.34.9
0.310.340.400.560.821.11.62.23.34.8
Technical leaflet Thermostatic expansion valves, type TUA/TUAE
© Danfoss A/S (RC-CMS / HBS), 02 - 2004 RD1AC502 13
Capacity (continued)
Correction factor for subcooling ∆tsub
Note:Insufficient subcooling can produce flash gas.
Correction for subcooling ∆tsub
The evaporator capacity used must be corrected if subcooling deviates from 4 K.The corrected capacity can be obtained by dividing the evaporator capacity by the correction factor given below.
∆tsub 4 K 10 K 15 K 20 K 25 K 30 K 35 K 40 K 45 K 50 K
Correction factor
1.00 1.08 1.14 1.21 1.27 1.33 1.39 1.45 1.51 1.57
Capacity in kW for range B = −60 → −25°C and opening superheat OS = 4 K R407CValve type
Orificeno.
Pressure drop across valve ∆p bar Pressure drop across valve ∆p bar
2 4 6 8 10 12 14 16 2 4 6 8 10 12 14 16
Evaporating temperature –25°C Evaporating temperature –30°C
TU
0123456789
0.340.430.520.731.11.52.22.94.46.5
0.420.540.670.931.41.82.83.75.68.2
0.460.610.751.01.52.13.14.16.29.2
0.490.650.791.11.62.23.34.46.69.7
0.500.660.821.21.72.33.44.56.8
10.1
0.510.670.831.21.72.33.54.67.0
10.2
0.510.670.841.21.72.33.54.67.0
10.3
0.500.670.831.21.72.33.54.66.9
10.2
0.310.370.450.620.921.21.82.53.75.5
0.380.470.560.791.21.62.33.14.76.9
0.420.520.630.881.31.72.63.55.37.7
0.440.560.670.941.41.82.83.75.68.2
0.450.570.690.971.41.92.93.85.88.4
0.460.580.700.981.41.92.93.95.88.6
0.460.590.700.981.51.92.93.95.98.6
0.460.580.700.981.41.92.93.95.88.5
Evaporating temperature –40°C Evaporating temperature –50°C
TU
0123456789
0.240.270.310.440.650.861.31.72.63.8
0.300.340.390.550.811.11.62.23.34.8
0.330.370.440.610.901.21.82.43.65.3
0.350.390.460.650.951.31.92.53.95.6
0.360.410.470.670.981.32.02.64.05.8
0.360.410.480.680.991.32.02.74.05.8
0.360.410.480.680.991.32.02.74.05.8
0.360.410.480.670.981.32.02.64.05.8
0.170.180.210.300.440.590.871.21.82.6
0.220.230.270.370.550.731.11.52.23.2
0.240.250.290.410.600.811.21.62.43.5
0.250.270.310.440.630.851.31.72.63.7
0.260.270.320.450.650.881.31.72.63.8
0.260.280.320.450.660.881.31.82.73.9
0.260.280.320.450.660.881.31.82.73.9
0.260.270.320.450.650.871.31.72.63.8
Evaporating temperature –60°C
TU
0123456789
0.120.120.140.200.290.390.580.781.21.7
0.150.150.170.250.360.480.710.961.52.1
0.160.170.190.270.390.530.791.11.62.3
0.180.180.200.290.410.560.831.11.72.4
0.170.180.210.290.420.570.851.11.72.5
0.170.180.210.290.430.570.851.11.72.5
0.170.180.210.290.420.570.851.11.72.5
0.170.180.200.290.420.560.831.11.72.5
14 RD1AC502 © Danfoss A/S (RC-CMS / HBS), 02 - 2004
Technical leaflet Thermostatic expansion valves, type TUA/TUAE
Correction factor for subcooling ∆tsub
Note:Insufficient subcooling can produce flash gas.
Correction for subcooling ∆tsub
The evaporator capacity used must be corrected if subcooling deviates from 4 K.The corrected capacity can be obtained by dividing the evaporator capacity by the correction factor given below.
∆tsub 4 K 10 K 15 K 20 K 25 K 30 K 35 K 40 K 45 K 50 K
Correction factor
1.00 1.08 1.15 1.21 1.27 1.33 1.39 1.45 1.50 1.56
Capacity (continued)
Capacity in kW for range N = −40 → +10°C and opening superheat OS = 4 K R410AValve type
Orificeno.
Pressure drop across valve ∆p bar Pressure drop across valve ∆p bar
3 6 9 12 15 18 21 24 3 6 9 12 15 18 21 24
Evaporating temperature +10°C Evaporating temperature 0°C
TU
0123456789
0.560.891.451.983.14.16.28.2
12.118.3
0.721.131.902.64.15.38.1
10.715.824.0
0.801.262.23.04.66.19.2
12.718.027.2
0.851.302.33.24.96.59.9
13.119.329.1
0.871.372.43.35.16.7
10.313.620.030.2
0.881.382.53.35.26.8
10.513.820.330.6
0.871.362.43.35.16.8
10.413.820.230.5
0.851.332.43.35.06.7
10.213.519.929.9
0.560.841.251.722.63.55.37.0
10.415.7
0.701.061.642.33.54.66.99.2
13.720.5
0.781.181.862.63.95.27.9
10.415.523.3
0.831.241.992.74.25.68.4
11.116.624.9
0.851.292.12.94.35.88.7
11.617.225.8
0.861.302.12.94.45.98.9
11.817.526.2
0.851.292.12.94.45.88.9
11.817.526.2
0.841.272.12.94.35.88.8
11.617.225.7
Evaporating temperature –10°C Evaporating temperature –20°C
TU
0123456789
0.530.761.041.442.22.94.35.88.6
12.9
0.670.961.351.862.83.75.67.5
11.216.8
0.741.071.522.13.24.26.48.5
12.719.0
0.781.131.632.33.44.56.89.1
13.620.3
0.801.161.692.33.54.77.19.4
14.121.0
0.811.171.722.43.64.87.29.6
14.321.3
0.811.171.722.43.64.87.29.6
14.321.3
0.791.151.702.43.54.87.19.5
14.121.0
0.600.831.061.482.23.04.45.98.9
13.2
0.670.921.201.672.53.35.06.6
10.014.8
0.700.971.281.782.73.55.37.1
10.715.8
0.721.001.321.842.73.75.57.4
11.016.4
0.731.011.341.872.83.75.67.5
11.216.6
0.731.001.341.872.83.75.67.5
11.216.6
0.720.991.331.852.83.75.57.4
11.116.4
Evaporating temperature –30°C Evaporating temperature –40°C
TU
0123456789
0.520.660.811.131.672.23.34.56.79.9
0.580.740.901.271.872.53.75.07.6
11.1
0.610.790.961.352.02.74.05.48.0
11.8
0.630.821.001.402.12.84.15.58.3
12.2
0.630.821.011.412.12.84.25.68.4
12.4
0.630.821.011.412.12.84.25.68.4
12.4
0.620.811.001.402.12.84.15.58.3
12.2
0.480.560.660.931.361.822.73.65.58.1
0.500.590.700.981.451.92.93.95.88.6
0.520.610.721.021.492.03.04.06.08.8
0.520.620.731.031.512.03.04.06.18.9
0.520.620.731.031.502.03.04.06.18.9
0.510.610.721.011.482.03.04.06.08.8
Technical leaflet Thermostatic expansion valves, type TUA/TUAE
© Danfoss A/S (RC-CMS / HBS), 02 - 2004 RD1AC502 15
Connection dimensions, see ordering tableFig. 6. Straightway
Weight0,16 kg
Dimensions and weight
Design/Function
1. Bulb with capillary tube2. Thermostatic element with
diaphragm3. Setting spindle for adjustment of
static superheat SS4. Orifice assembly5. Filter
Fig. 5. Superheat
SuperheatSee fig. 5SS = static superheatOS = opening superheatSH = SS + OS = total superheatQnom = rated capacityQmax = maximum capacity
Static superheat SS can be adjusted with setting spindle 3, see fig. 4.
The standard superheat setting SS is 5 K for valves without MOP and 4 K for valves with MOP (except R507).The opening superheat OS is 4 K from when opening begins to where the valve gives its rated capacity Qnom..
ExampleStatic superheat SS = 5 KOpening superheat OS = 4 KTotal superheat SH = 5 + 4 = 9 K
Fig. 4
16 RD1AC502 © Danfoss A/S (RC-CMS / HBS), 02 - 2004
Technical leaflet Thermostatic expansion valves, type TUA/TUAE