sight glass and moisture indicator (ss)
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Sight glasses - SG+, type SGM+,SGN+,SGI+
and SGRM+, SGRN+, SGRI+
REFRIGERATION AND
AIR CONDITIONING Technical leaflet
MAKING MODERN LIVING POSSIBLE
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Technical leaflet Sight glasses - SG+, type SGM+, SGN+, SGI+ and SGRM+, SGRN+, SGRI+
2 DKRCC.PD.EK0.B1.02 / 520H2659 © Danfoss A/S (AC-AKC / frz), 06 - 2008
Introduction
Sight glasses are used to indicate:
1. The condition of the refrigerant in
the liquid line of the plant.
2. The flow in the oil return line fromthe oil separator.
3. The moisture content in the refrigerant.
Features
The SGM+ and SGRM+ are mainly used toindicate the condition of the refrigerant as wellas the liquid level in the receiver or the oil level in
the compressor.
The SGI+/N+ and SGRI+/N+ are equippedwith sensitive indicators that reflects a colour,depending on the moisture content in therefrigerant.
Available types
Type SGM+ / SGRM+
For CFC / HCFC / HFC
Indicates lack of subcooling
Indicates refrigerant deficiency
Indicates liquid level in receiver
Indicates oil level in compressor
Flare /solder connection or socket type
Type SGI+ / SGRI+
For CFC and HCFC refrigerants
Indicates too high water content in therefrigeration system
Indicates lack of subcooling
Indicates refrigerant deficiency
Flare /solder connection or socket type
Type SGN+ / SGRN+
For HCFC/HFC refrigerants
Indicates too high water content in therefrigeration system
Indicates lack of subcooling
Indicates refrigerant deficiency
Flare / solder connection or socket type
SGM+:Without moistureindicator
Solder version
Flare version
SGI+:With CFC/HCFCmoisture indicator
SGN+:With HCFC/HFCmoisture indicator
Solder version
Flare version
SGRM+:Socket type withoutmoisture indicator
Socket
SGRI+:Saddle sight glasswith CFC/HCFCmoisture indicator
SGRN+:Saddle sight glasswith HCFC/HFCmoisture indicator
Socket
Saddle
Approvals
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Technical leaflet Sight glasses - SG+, type SGM+, SGN+, SGI+ and SGRM+, SGRN+, SGRI+
© Danfoss A/S (AC-AKC / frz), 06 - 2008 DKRCC.PD.EK0.B1.02 / 520H2659 3
Technical data Ambient temperature
–50°C → +80°C / -58oF → +175oF
Max. working pressureSGM+ PS/MWP = 46 bar / 667 psiSGI+ / SGN+ PS/MWP = 46 bar / 667 psiSGRM+ / SGRI+ / SGRN+ PS/MWP = 46 bar / 667 psi
Note: For moisture values of otherrefrigerants, please contact Danfoss.
SGN+ / SGRN+ for HFC and HCFC refrigerants
Moisture content ppm = parts per million
SGN+ / SGRN+
25°C / 77°F 43°C / 109°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
R410A < 66 66 - 266 >266 < 135 135 - 540 >540
SGI+ / SGRI+ for CFC and HCFC refrigerants
Moisture content ppm = parts per million
SGI+ / SGRI+
25°C / 77°F 43°C / 109°F
Green/
dry
Intermed.
color
Yellow/
wet
Green/
dry
Intermed.
color
Yellow/
wetR22 < 150 150 - 300 >300 < 250 250 - 500 > 500
Choice of sight glass Before choosing a sight glass with moistureindicator, the following should be considered:– type of refrigerant– water solubility of refrigerant– the level on which a danger signal is
required.
Be aware that polyester oil for HFC refrigerants,e.g. R134a, R404A, R407C and R410A react withwater in a hydrolysis generating acid and alcohol.
The recommended levels of moisture contentare usually between 30 and 75 ppm, wherehermetic compressors only tolerate very lowmoisture content, while semi-hermetic and othercompressors normally tolerate higher moisturecontents in the refrigerant.
The color on the sight glass indicator depends onthe moisture content of the refrigerant.
The values under “green/dry” are to be consideredas perfect condition meaning full protectionagainst harmful effects from moisture. In other
words, the filter drier is working perfectly.
If the green color starts to fade, the color changehas begun and the indicator should therefore bewatched more carefully. If the color changes toyellow it is a clear signal, that the capacity of thefilter drier is exceeded and should be replaced assoon as possible.
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Technical leaflet Sight glasses - SG+, type SGM+, SGN+, SGI+ and SGRM+, SGRN+, SGRI+
4 DKRCC.PD.EK0.B1.02 / 520H2659 © Danfoss A/S (AC-AKC / frz), 06 - 2008
Ordering
(continued...)
1) Can be screwed directly into the filter drier.
Monitor
Type VersionConnection
in.
Connection
mm
Code no.
(Multiple Pack)
Code no.
(Industrial Pack
for OEM)SGM+ 10 Flare ext. × ext. 3 /8 ×
3 /8 10 × 10 014F0080
SGM+ 12s
SGM+ 16sODF × ODF
solder
1 /2 ×1 /2
5 /8 ×5 /8 16 × 16
014F0086
014F0087
CFC/HCFC
Type VersionConnection
in.
Connection
mm
Code no.
(Multiple Pack)
Code no.
(Industrial Pack
for OEM)SGI+ 6
SGI+ 10
SGI+ 12
SGI+ 16
SGI+ 19
Flare ext. × ext. 1 /4 ×1 /4
3 /8 ×3 /8
1 /2 ×1 /2
5 /8 ×5 /8
3 /4 ×3 /4
6 × 6
10 × 10
12 × 12
16 × 16
19 × 19
014F0007
014F0008
014F0009
014F0024
014F0028
014F0105
SGI+ 6
SGI+ 10
SGI+ 12
SGI+ 16
SGI+ 19
Flare int. × ext. 1) 1 /4 ×1 /4
3 /8 ×3 /8
1 /2 ×1 /2
5
/8 ×
5
/83 /4 ×3 /4
6 × 6
10 × 10
12 × 12
16×
1619 × 19
014F0021
014F0022
014F0025
014F0026014F0043
014F0100
014F0075
014F0265
SGI+ 6s
SGI+ 10s
SGI+ 12s
SGI+ 16s
SGI+ 19s
SGI+ 22s
ODF × ODF solder
1 /4 ×1 /4
3 /8 ×3 /8
1 /2 ×1 /2
5 /8 ×5 /8
3 /4 ×3 /4
7 /8 ×7 /8
16 × 16
19 × 19
22 × 22
014F0034
014F0035
014F0036
014F0044
014F0047
014F0039
014F0109
014F0115
014F0104
014F0167
014F0168
014F0169
SGI+ 6s
SGI+ 10s
SGI+ 12s
SGI+ 18s
ODF × ODF solder
6 × 6
10 × 10
12 × 12
18 × 18
014F0040
014F0041
014F0042
014F0045
SGI+ 6s
SGI+ 10s
SGI+ 12s
SGI+ 16s
SGI+ 22s
ODF × ODM
solder
1
/4 ×
1
/43 /8 ×3 /8
1 /2 ×1 /2
5 /8 ×5 /8
7 /8 ×7 /8
16 × 16
22 × 22
014F0125014F0126
014F0127
014F0128
014F0130 014F1080
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Technical leaflet Sight glasses - SG+, type SGM+, SGN+, SGI+ and SGRM+, SGRN+, SGRI+
© Danfoss A/S (AC-AKC / frz), 06 - 2008 DKRCC.PD.EK0.B1.02 / 520H2659 5
Ordering (cont.)HFC/HCFC
Type VersionConnection
in.
Connection
mm
Code no.
(Multiple Pack)
Code no.
(Industrial Pack
for OEM)
SGN+ 6SGN+ 10
SGN+ 12
SGN+ 16
SGN+ 19
Flare ext. × ext.
1 /4 × 1 /43 /8 ×
3 /81 /2 ×
1 /25 /8 ×
5 /83 /4 ×
3 /4
6 × 610 × 10
12 × 12
16 × 16
19 × 19
014F0161014F0162
014F0163
014F0165
014F0166
014F1131014F0250
SGN+ 6
SGN+ 10
SGN+ 12
SGN+ 16
SGN+ 19
Flare int. × ext. 2)
1 /4 ×1 /4
3 /8 ×3 /8
1 /2 ×1 /2
5 /8 ×5 /8
3 /4 ×3 /4
6 × 6
10 × 10
12 × 12
16 × 16
19 × 19
014F0171
014F0172
014F0173
014F0174
014F0175
014F1132
014F0124
014F1128
014F1129
SGN+ 6s
SGN+ 10s
SGN+ 12s
SGN+ 16sSGN+ 19s
SGN+ 22s
SGN+ 22s
ODF×
ODFsolder
1 /4 ×1 /4
3 /8 ×3 /8
1 /2 ×1 /2
5 /8 × 5 /83 /4 ×
3 /47 /8 ×
7 /811 /8 × 1
1 /8
16 × 1619 × 19
22 × 22
014F0181
014F0182
014F0183
014F0184014F0185
014F0186
014F0187
014F0148
014F1224
014F0117
014F0199
014F0200
014F1133
SGN+ 6s
SGN+ 10s
SGN+ 12s
SGN+ 18s
ODF × ODF
solder
6 × 6
10 × 10
12 × 12
18 × 18
014F0191
014F0192
014F0193
014F0195
014F1020
014F0197
014F1130
SGN+ 6s
SGN+ 10s
SGN+ 12s
SGN+ 16s
SGN+ 22s
ODF × ODM
solder
1 /4 ×1 /4
3 /8 ×3 /8
1 /2 ×1 /2
5 /8 ×5 /8
7 /8 ×7 /8
16 × 16
22 × 22
014F0201
014F0202
014F0203
014F0204
014F0206
014F1201
014F1202
014F1203
014F1204
014F1206
(continued...)
2) Can be screwed directly into the filter drier.
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Technical leaflet Sight glasses - SG+, type SGM+, SGN+, SGI+ and SGRM+, SGRN+, SGRI+
6 DKRCC.PD.EK0.B1.02 / 520H2659 © Danfoss A/S (AC-AKC / frz), 06 - 2008
Ordering (cont.)
Socket
Type Version
ConnectionCode no.
(Multiple Pack)
Code no.
(IndustrialPack for OEM)
1 2
SGRM+ ¾SGRM+ ¾SGRM+ ½SGRM+
Pipe threadNPTNPTSGRM+ for saddle
G ¾ A2)
¾ NPT½ NPTM24x1
014F0004014F0005014F0002
014F0076
014F0178014F1066
1
SGRI+SGRI+
SGRI+SGRI+ for saddle
½ - 14 NPTM24 x 1
014F0131014F1154
014F0177014F1054
SGRN+SGRN+
SGRN+
SGRN+SGRN+ for saddle
SGRN+ for saddle
½ NPTM24 x 1
M20 x 1.5
014F0006014F1155
014F1601
014F0093014F1055
014F1602
SGSSGSSGSSGSSGSSGSSGSSGS
Tube fitting Tube fitting Tube fitting Tube fitting Tube fitting Tube fitting Tube fitting Tube fitting
M20 × 1.5M24 × 1M24 × 1M24 × 1M24 × 1M24 × 1M24 × 1M24 × 1
31 /87 /8
11 /813 /815 /821 /831 /841 /8
014-1072014-1059014-1056014-1057014-1058014-1067014-1068014-1069
1
2
1
2)ISO 228/1
Accessories Cap Cover
Sight glasses Code no.
size 6 - 10
size 12 - 22
014F5481
014F5480
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Technical leaflet Sight glasses - SG+, type SGM+, SGN+, SGI+ and SGRM+, SGRN+, SGRI+
© Danfoss A/S (AC-AKC / frz), 06 - 2008 DKRCC.PD.EK0.B1.02 / 520H2659 7
Dimensions and weights
SGI+ / SGN+ flare, int. × ext. SGI+ / SGN+ solder ODF × ODF SGRM+
SGI+ / SGN+ solder ODF × ODM SGRI+ / N+
Type VersionL L1 H H1 B1 Ø D Weight
mm in mm in mm in mm in mm in mm in kg lb
SGI+/SGN+ 6
SGI+/SGN+ 10
SGI+/SGN+ 12
SGI+/SGN+ 16SGI+/SGN+ 19
Flareext. × ext.
67
82
88
104110
2,6
3,2
3,5
4,1
4,3
25
27
32
3539
1,01,11,31,41,5
17
18
21
2325
0,70,70,80,91,0
10
14
17
2024
0,40,50,60,80,9
24
24
29
2929
0,90,91,21,21,2
0,06
0,10
0,15
0,210,27
0,130,220,330,460,60
SGI+/SGN+ 6
SGI+/SGN+ 10
SGI+/SGN+ 12
SGI+/SGN+ 16
SGI+/SGN+ 19
Flare
int. × ext.
46
57
59
71
75
1,82,22,32,83,0
25
27
32
35
39
1,0
1,1
1,3
1,4
1,5
17
18
21
23
25
0,70,70,80,91,0
10
15
17
20
24
0,4
0,6
0,6
0,8
0,9
24
24
29
29
29
0,9
0,9
1,2
1,2
1,2
0,07
0,08
0,15
0,16
0,26
0,15
0,18
0,33
0,35
0,57
SGI+/SGN+ 6s
SGI+/SGN+ 10s
SGI+/SGN+ 12sSGI+/SGN+ 16s
SGI+/SGN+ 18s
SGI+/SGN+ 22s
ODF × ODFsolder
101
119
146146
173
173
4,0
4,7
5,75,7
6,8
6,8
7
9
1012
14
17
0,3
0,4
0,40,5
0,6
0,7
25
25
3232
42
42
1,0
1,0
1,31,3
1,7
1,7
17
17
2020
25
25
0,7
0,7
0,80,8
1,0
1,0
24
24
2929
29
29
0,9
0,9
1,21,2
1,2
1,2
0,04
0,05
0,090,11
0,15
0,19
0,09
0,11
0,200,24
0,33
0,42
SGI+/SGN+ 6s
SGI+/SGN+ 10sSGI+/SGN+ 12sSGI+/SGN+ 16s
ODF × ODMsolder
101
119146146
4,04,75,75,7
7
91012
0,30,40,40,5
25
253232
1,01,01,31,3
17
172020
0,70,70,80,8
24
242929
0,90,91,21,2
0,04
0,050,090,11
0,090,110,200,24
SGRM+ ½ NPT 30 1,2 18 0,7 27 1,1 0,10 0,22
SGRM+ ¾ Pipe thread 23 0,9 10 0,4 32 1,3 0,10 0,22
SGRM+ ¾ NPT 31 1,2 18 0,7 32 1,3 0,10 0,22
SGRN+ ½ NPT 30 1,2 18 0,7 27 1,1 0,10 0,22
SGI+ / SGN+ flare, ext. × ext.
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Technical leaflet Sight glasses - SG+, type SGM+, SGN+, SGI+ and SGRM+, SGRN+, SGRI+
8 DKRCC.PD.EK0.B1.02 / 520H2659 © Danfoss A/S (AC-AKC / frz), 06 - 2008
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