Danfoss SG, SGI, SGN, SGR, SGRI Data sheet
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Data sheet
Sight glass (Low pressure)
Types SG, SGI, SGN, SGR, SGRI and SGRN
SG is sight glasses for low pressure application (Max Working Pressure 500 psig).
SG is available with flare, solder and socket connections, and with and without moisture indicators.
SG and SGR, without moisture indicator, are mainly used to indicate the condition of the refrigerant in the liquid line or the flow in the oil return line from the oil separator.
SGI / SGN and SGRI / SGRN are equipped with sensitive indicators that reflects a color,
which depends on the moisture content in the refrigerant.
Features |
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Provides fast and easy indication of: |
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–– High system moisture content |
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–– Lack of subcooling or low system charge |
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–– Liquid level in receiver |
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(vessel mount versions only) |
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• Oil level in compressor |
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(vessel mount versions only) |
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Two Indicator types: |
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–– Type “I” – provides optimal moisture |
indication for refrigerants with mineral oil, e.g. R22
–– Type “N” – provides optimal moisture indication for refrigerants: R22, R134a, R404A, R407C, R507, R407A, R407F, R448A, R449A, R450A, R452A, R513A
•All indicators are dirt resistant
•Available in both inline and vessel mount versions
•Hermetically sealed, tempered glass for easy viewing
•Available in flare / flare, solder / solder connection or socket type
© Danfoss | DCS (jmn) | 2018.06 |
DKRCC.PD.EK0.B4.22 | 1 |
Data sheet | Sight Glass, Types SG, SGI, SGN, SGR, SGRI and SGRN
Approvals
Technical data
Media temperature |
-58 – 175 °F |
Maximum working pressure |
PS / MWP = 500 psig |
Refrigerant oil |
All mineral oils and ester oils |
Selection |
Prior to selecting a sightglass with moisture |
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indicator, the following should be considered: |
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• Type of refrigerant |
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• Water solubility of refrigerant |
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• The level at which a danger signal is required |
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to prevent the formation of harmful acids |
Note: when storing, transporting or installing the Sight Glass, avoid the chemical indicator to get in contact with non-refrigerant medium or fluid (like water, oil, ect.)
The following tables indicate moisture content levels at which the sightglass indicator will register a dry or wet system for various refrigerants.
The values under “green / dry” are to be taken as the maximum permissible moisture content for the system. When the green color begins to fade indicating an increase in moisture levels, the sightglass should be checked more frequently. If the moisture levels increase enough to change the indicator to “yellow” indicating a wet system, the filter drier must be changed immediately.
SGI / SGRI for refrigerants with mineral oil
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Moisture content ppm = parts per million |
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SGI / SGRI |
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Media temperature 77 °F |
Media temperature 110 °F |
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Green / dry |
Intermed. color |
Yellow / wet |
Green / dry |
Intermed. color |
Yellow / wet |
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Refrigerants with |
< 150 |
150 – 300 |
> 300 |
< 250 |
250 – 500 |
> 500 |
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mineral oil, e.g. R22 |
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SGN / SGRN for R22, R134a, R404A, R407C, R507, R407A, R407F, R448A, R449A, R450A, R452A, R513A
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Moisture content ppm = parts per million |
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SGN / SGRN |
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Media temperature 77 °F |
Media temperature 110 °F |
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Green / dry |
Intermed. color |
Yellow / wet |
Green / dry |
Intermed. color |
Yellow / wet |
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R22 |
< 30 |
30 – 120 |
> 120 |
< 50 |
50 – 200 |
> 200 |
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R134a |
< 30 |
30 – 100 |
> 100 |
< 45 |
45 – 170 |
> 170 |
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R404A |
< 20 |
20 – 70 |
> 70 |
< 25 |
25 – 100 |
> 100 |
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R407C |
< 30 |
30 – 140 |
> 140 |
< 60 |
60 – 225 |
> 225 |
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R507 |
< 15 |
15 – 60 |
> 60 |
< 30 |
30 – 110 |
> 110 |
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R407A |
< 29 |
29 – 115 |
> 115 |
< 48 |
48 – 192 |
> 192 |
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R407F |
< 30 |
30 – 168 |
>168 |
< 60 |
60 – 240 |
> 240 |
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R448A |
< 28 |
28 – 110 |
> 110 |
< 70 |
70 – 227 |
> 227 |
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R449A |
< 29 |
29 – 105 |
> 105 |
< 53 |
53 – 200 |
> 200 |
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R450A |
< 23 |
23 – 148 |
> 148 |
< 46 |
46 – 245 |
> 245 |
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R452A |
< 20 |
20 – 79 |
> 79 |
< 30 |
30 – 143 |
> 143 |
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R513A |
< 22 |
22 – 75 |
> 75 |
< 22 |
22 – 123 |
> 123 |
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Notes:
––For colours reflecting moisture values of other refrigerants, please contact Danfoss
––For a fully updated list of approved refrigerants, visit www.products.danfoss.com and search for individual code numbers, where refrigerants are listed as part of product specifications.
© Danfoss | DCS (jmn) | 2018.06 |
DKRCC.PD.EK0.B4.22 | 2 |
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