1. Useful Engineering Data
REFRIGERANT PRESSURE – TEMPERATURE CHART
Pressure in kg/cm2 (g) Pressure in kg/cm2 (g)
Temp. Temp.
R407C R407C
in OC R22 R134a in OC R22 R134a
Bubble Dew Bubble Dew
-14 2.11 0.71 2.50 1.70 24 9.42 5.56 10.60 8.90
-13 2.22 0.78 2.65 1.80 25 9.71 5.76 10.90 9.20
-12 2.34 0.86 2.80 1.90 26 10.00 5.96 11.20 9.50
-11 2.47 0.93 2.90 2.05 27 10.29 6.17 11.55 9.80
-10 2.60 1.01 3.00 2.20 28 10.60 6.39 11.90 10.10
-9 2.73 1.09 3.15 2.30 29 10.93 6.60 12.25 10.40
-8 2.86 1.18 3.30 2.40 30 11.23 6.83 12.60 10.70
-7 3.00 1.27 3.45 2.55 31 11.56 7.06 12.95 11.05
-6 3.14 1.36 3.60 2.70 32 11.89 7.29 13.30 11.40
-5 3.28 1.45 3.80 2.85 33 12.23 7.53 13.65 11.75
-4 3.43 1.54 4.00 3.00 34 12.57 7.77 14.00 12.10
-3 3.58 1.64 4.15 3.15 35 12.91 8.02 14.40 12.45
-2 3.74 1.74 4.30 3.30 36 13.27 8.27 14.80 12.80
-1 3.90 1.85 4.50 3.45 37 13.62 8.53 15.20 13.20
0 4.07 1.95 4.70 3.60 38 13.99 8.80 15.60 13.60
1 4.24 2.06 4.85 3.75 39 14.37 9.07 16.05 14.00
2 4.41 2.18 5.00 3.90 40 14.76 9.34 16.50 14.40
3 4.60 2.29 5.20 4.10 41 15.15 9.62 16.90 14.80
4 4.79 2.41 5.40 4.30 42 15.55 9.91 17.30 15.20
5 4.97 2.53 5.65 4.45 43 15.95 10.22 17.75 15.65
6 5.15 2.66 5.90 4.60 44 16.36 10.50 18.20 16.10
7 5.34 2.79 6.10 4.80 45 16.77 10.80 18.70 16.55
8 5.54 2.92 6.30 5.00 46 17.20 11.11 19.20 17.00
9 5.75 3.06 6.50 5.20 47 17.63 11.43 19.65 17.45
10 5.96 3.20 6.70 5.40 48 18.07 11.75 20.10 17.90
11 6.17 3.34 6.95 5.65 49 18.51 12.08 20.60 18.40
12 6.39 3.49 7.20 5.90 50 18.77 12.42 21.10 18.90
13 6.61 3.64 7.45 6.10 51 19.32 12.76 21.65 19.40
14 6.84 3.79 7.70 6.30 52 19.79 13.10 22.20 19.90
15 7.07 3.95 7.95 6.55 53 20.27 13.46 22.70 20.40
16 7.31 4.11 8.20 6.80 54 20.76 13.82 23.20 20.90
17 7.55 4.28 8.50 7.05 55 21.25 13.91 23.80 21.45
18 7.80 4.45 8.80 7.30 56 21.76 14.56 24.40 22.00
19 8.06 4.62 9.10 7.55 57 22.27 14.94 24.95 22.55
20 8.32 4.80 9.40 7.80 58 22.79 15.33 25.50 23.10
21 8.59 4.98 9.70 8.05 59 23.32 15.72 26.10 23.70
22 8.86 5.17 10.00 8.30 60 23.86 16.13 26.70 24.30
23 9.14 5.36 10.30 8.60 65 26.68 18.24 29.85 27.35

2. PRESSURE CONVERTOR CHART FROM kg/cm2 to psi
kg/cm2
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
↓→
0 0 1.42 2.85 4.27 5.69 7.11 8.53 9.96 11.38 12.80
1 14.22 15.65 17.07 18.49 19.91 21.34 22.76 24.18 25.60 27.02
2 28.45 29.87 31.29 32.71 34.14 35.56 36.98 38.40 39.83 41.25
3 42.67 44.09 45.51 46.94 48.36 49.78 51.20 52.63 54.05 55.47
4 56.89 58.32 56.74 61.16 62.58 64.00 65.43 66.85 68.27 69.69
5 71.12 72.54 73.96 75.38 76.81 78.23 79.65 81.07 82.49 83.92
6 85.34 86.76 88.18 89.61 91.03 92.45 93.87 95.60 96.42 98.14
7 99.56 100.98 102.41 103.83 105.25 106.67 108.10 109.52 110.94 112.36
8 113.79 115.21 116.63 118.05 119.47 120.90 122.32 123.74 125.16 126.59
9 128.01 129.43 130.85 132.28 133.70 135.12 136.54 137.86 139.39 140.81
10 142.23 143.65 145.08 146.50 147.92 149.34 150.77 152.19 153.61 155.03
11 156.45 157.88 159.30 160.72 162.14 163.57 164.99 166.41 167.83 169.26
12 170.68 172.10 173.52 174.94 176.37 177.79 179.21 180.63 182.06 183.48
13 184.80 186.32 187.75 189.17 190.59 192.01 193.43 194.86 196.28 197.70
14 199.12 200.55 201.97 203.39 204.81 206.24 207.66 209.08 210.50 211.92
15 213.35 214.77 216.19 217.61 219.04 220.46 221.88 223.30 224.73 226.15
16 227.57 228.99 230.41 231.84 233.26 234.68 236.10 237.53 238.95 240.37
17 241.79 243.22 244.64 246.06 247.48 248.90 250.33 251.75 253.17 254.59
18 256.02 257.44 258.86 260.28 261.71 263.13 264.55 265.97 267.39 268.82
19 270.24 271.66 273.08 274.51 275.93 277.35 278.77 280.20 281.62 283.04
20 284.46 285.88 287.31 288.73 290.15 291.57 293.00 294.42 295.84 297.26
21 298.69 300.11 301.53 302.95 304.37 305.80 307.22 308.64 310.06 311.49
22 312.91 314.33 315.75 317.18 318.60 320.02 321.44 322.86 324.29 325.71
23 327.13 328.55 329.98 331.40 332.82 334.24 335.67 337.00 338.51 339.93
24 341.35 342.78 344.20 335.62 337.04 348.47 349.89 351.31 352.73 354.16
25 355.58 357.00 358.23 359.85 361.27 362.69 364.11 365.58 366.96 368.38
USEFUL CONVERSION FACTORS TABLE
Multiply By To Get Multiply By To Get
mm 0.0393 in m3/s 2119.5 cfm
m 3.2807 ft m3 35.315 cu.ft
kg 2.2046 lb m3/h 16.667 LPM
kcal/h 3.968 BTU/hr m3/h 4.403 GPM
watt 3.412 BTU/hr m3/s 15873 GPM
kcal/h 0.00033 Ref. Ton L/s 15.87 GPM
kW 0.284 Ref. Ton kg/cm2 14.223 psi
m/s 3.2807 fps kPa 0.145 psi
m/s 196.8 fpm kW 1.359 HP metric
m3/h 0.5886 cfm kW 1.341 HP UK
°C = {(5/9) x (°F-32)} °F = {((9/5) x °C) + 32}
1 psi = 0.68948 x 105 N/m2 = 68.948 mbar = 2.0360” Hg = 51.7149 torr (mmHg)
1 bar = 105 Pascal = 105 N/mm2 = 14.504 psi

3. TEMPERATURE CONVERTER
TEMPERATURE CONVERTER
To °C From To °F To °C From To °F To °C From To °F
-40.00 -40 -40.00 -9.44 15 59.00 21.11 70 158.00
-39.44 -39 -38.20 -8.89 16 60.80 21.67 71 159.80
-38.89 -38 -36.40 -8.33 17 62.60 22.22 72 161.60
-38.33 -37 -34.60 -7.78 18 64.40 22.78 73 163.40
-37.78 -36 -32.80 -7.22 19 66.20 23.33 74 165.20
-37.22 -35 -31.00 -6.67 20 68.00 23.89 75 167.00
-36.67 -34 -29.20 -6.11 21 69.80 24.44 76 168.80
-36.11 -33 -27.40 -5.56 22 71.60 25.00 77 170.60
-35.56 -32 -25.60 -5.00 23 73.40 25.56 78 172.40
-35.00 -31 -23.80 -4.44 24 75.20 26.11 79 174.20
-34.44 -30 -22.00 -3.89 25 77.00 26.67 80 176.00
-33.89 -29 -20.20 -3.33 26 78.80 27.22 81 177.80
-33.33 -28 -18.40 -2.78 27 80.60 27.78 82 179.60
-32.78 -27 -16.60 -2.22 28 82.40 28.33 83 181.40
-32.22 -26 -14.80 -1.67 29 84.20 28.89 84 183.20
-31.67 -25 -13.00 -1.11 30 86.00 29.44 85 185.00
-31.11 -24 -11.20 -0.56 31 87.80 30.00 86 186.80
-30.56 -23 -9.40 0.00 32 89.60 30.56 87 188.60
-30.00 -22 -7.60 0.56 33 91.40 31.11 88 190.40
-29.44 -21 -5.80 1.11 34 93.20 31.67 89 192.20
-28.89 -20 -4.00 1.67 35 95.00 32.22 90 194.00
-28.33 -19 -2.20 2.22 36 96.80 32.78 91 195.80
-27.78 -18 -0.40 2.78 37 98.60 33.33 92 197.60
-27.22 -17 1.40 3.33 38 100.40 33.89 93 199.40
-26.67 -16 3.20 3.89 39 102.20 34.44 94 201.20
-26.11 -15 5.00 4.44 40 104.00 35.00 95 203.00
-25.56 -14 6.80 5.00 41 105.80 35.56 96 204.80
-25.00 -13 8.60 5.56 42 107.60 36.11 97 206.60
-24.44 -12 10.40 6.11 43 109.40 36.67 98 208.40
-23.89 -11 12.20 6.67 44 111.20 37.22 99 210.20
-23.33 -10 14.00 7.22 45 113.00 37.78 100 212.00
-22.78 -9 15.80 7.78 46 114.80 38.33 101 213.80
-22.22 -8 17.60 8.33 47 116.60 38.89 102 215.60
-21.67 -7 19.40 8.89 48 118.40 39.44 103 217.40
-21.11 -6 21.20 9.44 49 120.20 40.00 104 219.20
-20.56 -5 23.00 10.00 50 122.00 40.56 105 221.00
-20.00 -4 24.80 10.56 51 123.80 41.11 106 222.80
-19.44 -3 26.60 11.11 52 125.60 41.67 107 224.60
-18.89 -2 28.40 11.67 53 127.40 42.22 108 226.40
-18.33 -1 30.20 12.22 54 129.20 42.78 109 228.20
-17.78 0 32.00 12.78 55 131.00 43.33 110 230.00
-17.22 1 33.80 13.33 56 132.80 43.89 111 231.80
-16.67 2 35.60 13.89 57 134.60 44.44 112 233.60
-16.11 3 37.40 14.44 58 136.40 45.00 113 235.40
-15.56 4 39.20 15.00 59 138.20 45.56 114 237.20
-15.00 5 41.00 15.56 60 140.00 46.11 115 239.00
-14.44 6 42.80 16.11 61 141.80 46.67 116 240.80
-13.89 7 44.60 16.67 62 143.60 47.22 117 242.60
-13.33 8 46.40 17.22 63 145.40 47.78 118 244.40
-12.78 9 48.20 17.78 64 147.20 48.33 119 246.20
-12.22 10 50.00 18.33 65 149.00 48.89 120 248.00
-11.67 11 51.80 18.89 66 150.80 49.44 121 249.80
-11.11 12 53.60 19.44 67 152.60 50.00 122 251.60
-10.56 13 55.40 20.00 68 154.40 50.56 123 253.40
10.00 14 57.20 20.56 69 156.20 51.11 124 255.20