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 • Provides fast and easy indication of:
– High system moisture content
– Lack of subcooling or low system charge
– Liquid level in receiver
(vessel mount versions only)
• Oil level in compressor
(vessel mount versions only)
• Two Indicator types:
– 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
indicator, the following should be considered:
• Type of refrigerant
• Water solubility of refrigerant
• The level at which a danger signal is required
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.)
SGI / SGRI for refrigerants with mineral oil
Media temperature 77 °F Media temperature 110 °F
Green / dry Intermed. color Yellow / wet Green / dry Intermed. color Yellow / wet
Refrigerants with
mineral oil, e.g. R22
< 150 150 – 300 > 300 < 250 250 – 500 > 500
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.
Moisture content ppm = parts per million
SGI / SGRI
SGN / SGRN for R22, R134a, R404A, R407C, R507, R407A, R407F, R448A, R449A, R450A, R452A, R513A
Moisture content ppm = parts per million
SGN / SGRN
Media temperature 77 °F Media temperature 110 °F
Green / dry Intermed. color Yellow / wet Green / dry Intermed. color Yellow / wet
R22 < 30 30 – 120 > 120 < 50 50 – 200 > 200
R134a < 30 30 – 100 > 100 < 45 45 – 170 > 170
R404A < 20 20 – 70 > 70 < 25 25 – 100 > 100
R407C < 30 30 – 140 > 140 < 60 60 – 225 > 225
R507 < 15 15 – 60 > 60 < 30 30 – 110 > 110
R407A < 29 29 – 115 > 115 < 48 48 – 192 > 192
R407F < 30 30 – 168 >168 < 60 60 – 240 > 240
R448A < 28 28 – 110 > 110 < 70 70 – 227 > 227
R449A < 29 29 – 105 > 105 < 53 53 – 200 > 200
R450A < 23 23 – 148 > 148 < 46 46 – 245 > 245
R452A < 20 20 – 79 > 79 < 30 30 – 143 > 143
R513A < 22 22 – 75 > 75 < 22 22 – 123 > 123
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
Data sheet | Sight Glass, Types SG, SGI, SGN, SGR, SGRI and SGRN
Ordering
SG without indicator
Valve type Connection type
SG 22s Solder ODF x ODF
SGR NPT
SGI with I type indicator
Valve type Connection type
SGI 6
SGI 10
SGI 6s Solder ODF x ODF
SGI 10s Solder ODF x ODF
SGI 12s Solder ODF x ODF
SGI 16s Solder ODF x ODF
SGI 22s
SGRI NPT
1
) Can be screwed directly onto the Danfoss filter drier
Flare int. x ext. 1)
Solder ODF x ODF
Connection
[in.]
7
⁄8 014-1207
1
⁄2 014-0002
Connection
[in.]
1
⁄4 014-0063
3
⁄8 014-0064
1
⁄4 014-0066
3
⁄8 014-0067
1
⁄2 014-0068
5
⁄8 014-0069
7
⁄8 014-0070
1
⁄2 014-0131
Code no.
Code no.
Note: for other connection SG
codes, please contact
Danfoss manufacture factory
Metric conversions
1 in. = 25.4 mm
SGN with N type indicator
Valve type Connection type
SGN 6
SGN 10
SGN 6
SGN 10
SGN 12
SGN 6s
SGN 10s
SGN 12s
SGN 16s
SGN 22s
SGN 6s
SGN 12s
SGRN NPT
1
) Can be screwed directly onto the Danfoss filter drier
Flare int. x ext.
Flare int. x ext. 1)
Solder ODF x ODF
Solder ODF x ODM
Connection
[in.]
1
⁄4 014-0132
3
⁄8 014-0133
1
⁄4 014-0137
3
⁄8 014-0138
1
⁄2 014-0139
1
⁄4 014-0142
3
⁄8 014-0143
1
⁄2 014-0144
5
⁄8 014-0145
7
⁄8 014-0147
1
⁄4 014-0151
5
⁄16 014-0155
1
⁄2 014-0006
Code no.
© Danfoss | DCS (jmn) | 2018.06
DKRCC.PD.EK0.B4.22 | 3
Data sheet | Sight Glass, Types SG, SGI, SGN, SGR, SGRI and SGRN
Dimensions and weights
SGI, SGN flare, int. × ext. SGI, SGN flare, ext. × ext.
D
1
H
D
H
L
1
B
L
SGI, SGN solder ODF × ODF SGI, SGN solder ODF × ODM
D D
1
H
H
1
H
H
1
B
1
H
H
Metric conversions
1 in. = 25.4 mm
1 lb = 0.454 kg
L
1
L
Type
SGI / SGN 6
SGI / SGN 10 3.228 — 1.102 0.630 0.748 1.260 0.44
SGI / SGN 6
SGI / SGN 10 2.244 — 1.181 0.669 0.866 1.260 1.260
SGI / SGN 12 2.323 — 1.181 1.181 0.945 1.260 0.66
Connection
type
Flare
ext. × ext.
Flare
int. × ext
SGI / SGN 6s
SGI / SGN 10s 4.685 0.354 0.945 0.551 0.551 1.063 0.22
SGI / SGN 12s 5.748 0.394 1.102 0.630 0.748 1.063 0.44
SGI / SGN 16s 5.748 0.472 1.181 0.709 0.866 1.063 0.44
ODF × ODF
solder
L L
[in.] [in.] [in.] [in.] [in.] [in.] [lbs]
2.638 — 0.945 0.551 0.551 1.063 0.22
1.811 — 0.945 0.551 0.630 1.063 0.22
3.976 0.276 0.945 0.551 0.551 1.063 0.22
L
1
1
B
L
1
1
B
L
1
H H
1
B
1
øD
Net
weight
SGI / SGN 22s 6.811 0.699 1.457 0.827 1.063 1.260 0.66
SGI / SGN 6s
SGI / SGN 12s 5.748 0.394 1.102 0.630 0.748 1.063 0.44
ODF × ODM
solder
3.976 0.276 0.945 0.551 0.551 1.063 0.22
© Danfoss | DCS (jmn) | 2018.06
DKRCC.PD.EK0.B4.22 | 4
Danf
already on order pro
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Dimensions and weights
(continued)
SG socket
H
1
H
1
B
Metric conversions
1 in. = 25.4 mm
1 lb = 0.454 kg
Type
Connection
type
L L
1
H H
1
B
1
øD
[in.] [in.] [in.] [in.] [in.] [in.] [lbs]
Net
weight
SGR 1⁄2 NPT – – 1.181 0.709 1.063 – 0.22
SGRI / SGRN 1⁄2 NPT – – 1.181 0.709 1.063 – 0.22
oss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products
vided that such alterations can be made without subsequential changes being necessary eady agreed.
© Danfoss | DCS (jmn) | 2018.06
tive companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
DKRCC.PD.EK0.B4.22 | 5
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