Data sheet Sight glass (Low pressure) s SG, SGI, SGN, SGR, SGRI and SGRN SG is sight glasses for low pressure application (Max Working Pressure 35 bar / 500 psig). SG is available with flare, solder and socket connections, and with and without moisture indicators. SGI / SGN and SGRI / SGRN are equipped with sensitive indicators that reflects a color, which depends on the moisture content in the refrigerant. 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. Features SG / SGR (without indicator) Indicates lack of subcooling Indicates refrigerant deficiency Indicates liquid level in receiver Indicates oil level in compressor Solder / solder connection or socket type SGI / SGRI (with I type indicator) For refrigerants with mineral oil, e.g. R22 Indicates too high water content in the refrigeration system Indicates lack of subcooling Indicates refrigerant deficiency Flare / flare, solder / solder connection or socket type SGN / SGRN (with N type indicator) For refrigerants: R22, R34a, R404A, R407C, R507, R407A, R407F, R448A, R449A, R450A, R452A, R53A Indicates too high water content in the refrigeration system Indicates lack of subcooling Indicates refrigerant deficiency Flare / flare, solder / solder connection or socket type DKRCC.PD.EK0.A8.02
Available types Flare Internal x External Solder version ODF x ODF SGI and SGN with indicator SG without indicator Solder version ODF x ODM Solder version ODF x ODF Flare external x External SGI and SGN with indicator SGI and SGN with indicator SGI and SGN with indicator Socket Socket Saddle SGR without indicator SGRI and SGRN with indicator SGS Choice of sight glass moisture indication 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.) Before choosing a sight glass with moisture indicator, 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 non-flammable refrigerants, e.g. R34a, R404A, R407C react with water in a hydrolysis generating acid and alcohol. The recommended levels of moisture content are usually between 30 and 75 ppm, where hermetic compressors only tolerate very low moisture content, while semi-hermetic and other compressors normally tolerate higher moisture contents in the refrigerant. The colour on the sight glass indicator depends on the moisture content of the refrigerant. The values under green / dry are to be considered as perfect condition meaning full protection against harmful effects from moisture. In other words, the filter drier is working perfectly. If the green color starts to fade, the color change has begun and the indicator should therefore be watched more carefully. If the color changes to yellow it is a clear signal that the capacity of the filter drier is exceeded and must be replaced immediately. REAC requirements Note: All products fulfill the requirements in REAC. One of the obligations in REAC is to inform customers about presence of Candidate list substances if any, we hereby inform you about one substance on the candidate list: A moisture indicator in a sight glass contains a paper which is impregnated with Cobalt Dichloride (CAS no: 7646-79-9) in a concentration above 0.% w/w. If the valve has been damaged or dismantled: - Avoid skin contact with the paper - Do not inhale the dust from the paper - The paper must be disposed as hazardous waste DKRCC.PD.EK0.A8.02 2
Technical data Media temperature: -50 80 C / -58 75 F Max. working pressure (PS / MWP): 35 bar / 500 psig Refrigerant oil: All mineral oils and ester oils SGI / SGRI for refrigerants with mineral oil Refrigerants with mineral oil, e.g. R22 Moisture content ppm = parts per million SGI / SGRI Media temperature 25 C Media temperature 43 C Green / dry Intermed. color Yellow / wet Green / dry Intermed. color Yellow / wet < 50 50 300 > 300 < 250 250 500 > 500 SGN / SGRN for R22, R34a, R404A, R407C, R507, R407A, R407F, R448A, R449A, R450A, R452A, R53A Moisture content ppm = parts per million SGN / SGRN Media temperature 25 C Media temperature 43 C Green / dry Intermed. color Yellow / wet Green / dry Intermed. color Yellow / wet R22 < 30 30 20 > 20 < 50 50 200 > 200 R34a < 30 30 00 > 00 < 45 45 70 > 70 R404A < 20 20 70 > 70 < 25 25 00 > 00 R407C < 30 30 40 > 40 < 60 60 225 > 225 R507 < 5 5 60 > 60 < 30 30 0 > 0 R407A < 29 29 5 > 5 < 48 48 92 > 92 R407F < 30 30 68 >68 < 60 60 240 > 240 R448A < 28 28 0 > 0 < 70 70 227 > 227 R449A < 29 29 05 > 05 < 53 53 200 > 200 R450A < 23 23 48 > 48 < 46 46 245 > 245 R452A < 20 20 79 > 79 < 30 30 43 > 43 R53A < 22 22 75 > 75 < 22 22 23 > 23 Notes: For colours reflecting moisture values of other refrigerants, please contact 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 DKRCC.PD.EK0.A8.02 3
Ordering SG without indicator [inch] [mm] SG 0s Solder ODF ODF 3 8-04-0037 SG 22s Solder ODF ODF 7 8 22 04-207 SGI with I type indicator [inch] [mm] SGI 6 Flare ext. ext. 4 6 04-0007 SGI 0 Flare ext. ext. 3 8 0 04-0008 SGI 2 Flare ext. ext. 2 2 04-0009 SGI 6 Flare ext. ext. 5 8 6 04-0024 SGI 9 Flare ext. ext. 3 4 9 04-0028 SGI 6 Flare int. ext. ) 4 6 04-002 SGI 0 Flare int. ext. ) 3 8 0 04-0022 SGI 2 Flare int. ext. ) 2 2 04-0025 SGI 6 Flare int. ext. ) 5 8 6 04-0026 SGI 9 Flare int. ext. ) 3 4 9 04-0043 Solder ODF ODF 4-04-0034 SGI 6s Solder ODF ODF - 6 04-0040 Solder ODF ODF 3 8-04-0035 SGI 0s Solder ODF ODF - 0 04-004 Solder ODF ODF 2-04-0036 SGI 2s Solder ODF ODF - 2 04-0042 SGI 6s Solder ODF ODF 5 8 6 04-0044 SGI 8s Solder ODF ODF - 8 04-0045 SGI 9s Solder ODF ODF 3 4 9 04-0047 SGI 22s Solder ODF ODF 7 8 22 04-0039 SGI 6s Solder ODF ODM 4-04-025 SGI 0s Solder ODF ODM 3 8-04-026 SGI 2s Solder ODF ODM 2-04-027 SGI 6s Solder ODF ODM 5 8 6 04-028 SGI 22s Solder ODF ODM 7 8 22 04-030 ) Can be screwed directly into the filter drier DKRCC.PD.EK0.A8.02 4
Ordering (continued) SGN with N type indicator [inch] [mm] SGN 6 Flare ext. ext. 4 6 04-06 SGN 0 Flare ext. ext. 3 8 0 04-062 SGN 2 Flare ext. ext. 2 2 04-063 SGN 6 Flare ext. ext. 5 8 6 04-065 SGN 9 Flare ext. ext. 3 4 9 04-066 SGN 6 Flare int. ext. ) 4 6 04-07 SGN 0 Flare int. ext. ) 3 8 0 04-072 SGN 2 Flare int. ext. ) 2 2 04-073 SGN 6 Flare int. ext. ) 5 8 6 04-074 SGN 9 Flare int. ext. ) 3 4 9 04-075 SGN 6s SGN 0s SGN 2s Solder ODF ODF 4-04-08 Solder ODF ODF - 6 04-09 Solder ODF ODF 3 8-04-082 Solder ODF ODF - 0 04-092 Solder ODF ODF 2-04-083 Solder ODF ODF - 2 04-093 SGN 6s Solder ODF ODF 5 8 6 04-084 SGN 8s Solder ODF ODF - 8 04-095 SGN 9s Solder ODF ODF 3 4 9 04-085 SGN 22s Solder ODF ODF 7 8 22 04-086 SGN 22s 2 ) Solder ODF ODF 8-04-087 SGN 6s Solder ODF ODM 4-04-020 SGN 0s Solder ODF ODM 3 8-04-0202 SGN 2s Solder ODF ODM 2-04-0203 SGN 6s Solder ODF ODM 5 8 6 04-0204 SGN 22s Solder ODF ODM 7 8 22 04-0206 ) Can be screwed directly into the filter drier 2 ) Oversize connections DKRCC.PD.EK0.A8.02 5
Ordering (continued) Socket sight glass without indicator Valve type Indicator type Floating ball [pc] O-ring Multi pack SGR No G thread G 3 4 A ) No 04-0004 SGR No NPT 3 4 4 NPT 2 ) No 04-0005 SGR No NPT 2 4 NPT 2 ) 3 No 04-0002 Socket sight glass with indicator SGRI I type NPT 2 4 NPT 2 ) 3 No 04-03 SGRI I type M thread M24 No Yes 04-54 SGRN N type NPT 2 4 NPT 2 ) 3 No 04-0006 SGRN N type M thread M24 No Yes 04-55 ) ISO 228-2 ) ANSI/ASME B.20. Sight glass saddle Valve type SGS type Tube connection [inch] Industrial pack [pcs] Tube fitting M20.5 8 80 04-07 Tube fitting M20.5 3 8 80 04-074 Tube fitting M24 7 8 80 04-059 Tube fitting M24 8 80 04-056 Tube fitting M24 3 8 80 04-057 Tube fitting M24 5 8 80 04-058 Tube fitting M24 2 8 80 04-067 DKRCC.PD.EK0.A8.02 6
Dimensions and weights SGI / SGN flare, int. ext. SGI / SGN flare, ext. ext. 4-206.0 D 4-205.0 D MWP 35 bar/pb 500 psig-max.70 C/60 F WET SGN DANFOSS CINA L B L MWP 35 bar/pb 500 psig-max.70 C/60 F WET SGN DANFOSS CINA B SI Units SGI / SGN 6 L B ød Net weight [mm] [mm] [mm] [mm] [mm] [Kg] 67 23 4 4 27 0. SGI / SGN 0 82 28 5 9 32 0.2 SGI / SGN 2 Flare ext. ext. 88 30 7 22 32 0.3 SGI / SGN 6 04 37 2 27 37 0.4 SGI / SGN 9 0 4 22 32 37 0.5 SGI / SGN 6 46 23 4 6 27 0. SGI / SGN 0 57 30 7 22 32 0.2 SGI / SGN 2 Flare int. ext. 59 30 7 24 32 0.3 SGI / SGN 6 7 37 2 27 37 0.4 SGI / SGN 9 75 4 22 32 37 0.5 US Units SGI / SGN 6 L B ød Net weight [inch] [inch] [inch] [inch] [inch] [lbs] 2.64 0.9 0.55 0.55.06 0.22 SGI / SGN 0 3.23.0 0.59 0.75.26 0.44 SGI / SGN 2 Flare ext. ext. 3.46.8 0.67 0.87.26 0.66 SGI / SGN 6 4.09.46 0.83.06.46 0.88 SGI / SGN 9 4.33.6 0.87.26.46.0 SGI / SGN 6.8 0.9 0.55 0.63.06 0.22 SGI / SGN 0 2.24.8 0.67 0.87.26 0.44 SGI / SGN 2 Flare int. ext. 2.32.8 0.67 0.94.26 0.66 SGI / SGN 6 2.80.46 0.83.06.46 0.88 SGI / SGN 9 2.95.6 0.87.26.46.0 DKRCC.PD.EK0.A8.02 7
Dimensions and weights (continued) SG socket MWP 35 bar/pb 500 psig-max.70 C/60 F WET SGRN DANFOSS CINA B 4-203.0 SI Units B Net weight [mm] [mm] [mm] [kg] SGR Pipe thread G 3 4 A ) 23 0 32 0. SGR NPT 2 4 NPT 2 ) 30 8 27 0. SGR NPT 3 4 4 NPT 2 ) 3 8 32 0. SGRI / SGRN NPT 2 4 NPT 2 ) 30 8 27 0. SGRI / SGRN M thread M24 28 5 32 0. ) ISO 228-2 ) ANSI/ASME B.20. US Units B Net weight [inch] [inch] [inch] [lbs] SGR Pipe thread G 3 4 A ) 0.9 0.39.26 0.22 SGR NPT 2 4 NPT 2 ).8 0.7.06 0.22 SGR NPT 3 4 4 NPT 2 ).22 0.7.26 0.22 SGRI / SGRN NPT 2 4 NPT 2 ).8 0.7.06 0.22 SGRI / SGRN M thread M24.0 0.59.26 0.22 ) ISO 228-2 ) ANSI/ASME B.20. DKRCC.PD.EK0.A8.02 8
Dimensions and weights (continued) SGI / SGN solder ODF ODF 4-202.0 D MWP 35 bar/pb 500 psig-max.70 C/60 F WET SGN DANFOSS CINA L B SGI / SGN solder ODF ODM 4-20.0 D MWP 35 bar/pb 500 psig-max.70 C/60 F WET SGRN DANFOSS CINA L B L L SI Units SGI / SGN 6s L L B ød Net weight [mm] [mm] [mm] [mm] [mm] [mm] [kg] 0 7 23 4 4 27 0. SGI / SGN 0s 9 9 23 4 4 27 0. SGI / SGN 2s 46 0 28 5 9 27 0.2 SGI / SGN 6s Solder ODF 46 2 30 7 22 27 0.2 SGI / SGN 8s ODF 73 4 37 2 27 37 0.3 SGI / SGN 9s 73 4 37 2 27 37 0.3 SGI / SGN 22s 73 7 37 2 27 32 0.3 SGI / SGN 22s ) 73 22 37 2 27 32 0.3 SGI / SGN 6s 0 7 23 4 4 27 0. SGI / SGN 0s 9 9 23 4 4 27 0. SGI / SGN 2s Solder ODF ODM 46 0 28 5 9 27 0.2 SGI / SGN 6s 46 2 30 7 22 27 0.2 SGI / SGN 22s 73 7 37 2 27 32 0.3 ) Oversize connections US Units SGI / SGN 6s L L B ød Net weight [in.] [in.] [in.] [in.] [in.] [in.] [lbs] 3.98 0.28 0.9 0.55 0.55.06 0.22 SGI / SGN 0s 4.69 0.35 0.9 0.55 0.55.06 0.22 SGI / SGN 2s 5.75 0.39.0 0.59 0.75.06 0.44 SGI / SGN 6s Solder ODF 5.75 0.47.8 0.67 0.87.06 0.44 SGI / SGN 8s ODF 6.8 0.55.46 0.83.06.46 0.66 SGI / SGN 9s 6.8 0.55.46 0.83.06.46 0.66 SGI / SGN 22s 6.8 0.67.46 0.83.06.26 0.66 SGI / SGN 22s ) 6.8 0.87.46 0.83.06.26 0.66 SGI / SGN 6s 3.98 0.28 0.9 0.55 0.55.06 0.22 SGI / SGN 0s 4.69 0.35 0.9 0.55 0.55.06 0.22 SGI / SGN 2s Solder ODF ODM 5.75 0.39.0 0.59 0.75.06 0.44 SGI / SGN 6s 5.75 0.47.8 0.67 0.87.06 0.44 SGI / SGN 22s 6.8 0.67.46 0.83.06.26 0.66 ) Oversize connections can accept no responsibility for possible errors in catalogues, brochures and other printed material. reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary eady agreed. All trademarks in this material are property of the respective companies. and the logotype are trademarks of A/S. All rights reserved. DKRCC.PD.EK0.A8.02 9