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Danfoss : Sign Glass : SGI 6s 1/4" : ODF Solder Connection

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  • ใช้กับการทำความเย็นชนิด HCFC :  ( Refrigerant : HCFC )

  • ใช้ร่วมกับสารหลือลื่นที่สกัดจากธรรมชาติ

  • ใช้ตรวจระดับความชื้นในระบบ

  • การติดตั้งและนำไปใช้งานเป็นแบบเชื่อม

  • ขนาด 1/4" ทั้ง 2 ด้าน

Danfoss : Sign Glass : SGI 6s  1/4" : ODF Solder Connection

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  • Danfoss : Sign Glass : SGI 6s  1/4" : ODF Solder Connection

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Sight Glass

SGI ( Refrigerant : HCFC  , mineral oil , R22)

Sight glasses are used to indicate:

The SGI/N and SGRI/N are equipped with sensitive indicators that reflects a colour,
depending on the moisture content in the refrigerant.

Type SGI / SGRI
* Refrigerants where lubrication is by mineral oil e.g. HCFC
* Indicates too high water content in the refrigeration system
* Indicates lack of subcooling
* Indicates refrigerant deficiency
* Flare/solder connection or socket type

HCFC
Type Version Connection [in.] Connection [mm] Code no.
SGI 6s ODF × ODF
solder
¼ x ¼ 014-0034
SGI 10s ODF × ODF
solder
3/8 x 3/8 014-0035
SGI 12s ODF × ODF
solder
½ x ½ 014-0036
SGI 16s ODF × ODF
solder
5/8 x 5/8 16 × 16 014-0044
SGI 19s ODF × ODF
solder
¾ x ¾ 19 × 19 014-0047
SGI 22s ODF × ODF
solder
7/8 x 7/8 22 × 22 014-0039

  
Dimensions [mm] and weights [kg]
Type Version L L1 H H1 B1 øD Net weight
SGI / SGN 6s ODF × ODF
solder
101 7 24 14 14 27 0.1
SGI / SGN 10s ODF × ODF
solder
119 9 24 14 14 27 0.1
SGI / SGN 12s ODF × ODF
solder
146 10 28 16 19 27 0.2
SGI / SGN 16s ODF × ODF
solder
146 12 30 18 22 27 0.2
SGI / SGN 18s ODF × ODF
solder
173 14 37 21 27 37 0.3
SGI / SGN 22s ODF × ODF
solder
173 17 37 21 27 27 0.3
SGI / SGN 22s ODF × ODF
solder
173 22 37 21 27 27 0.3
Choice of sight glass
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 HFC refrigerants, e.g. R134a, 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 color 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 should be replaced as soon as possible.
SGI / SGRI for mineral oil e.g. HCFC refrigerants
Mineral oil e.g. R22 Moisture content ppm = parts per million
SGI / SGRI
25 °C 43 °C
Green/ dry Intermed. color Yellow/ wet Green/ dry Intermed. color Yellow/ wet
< 150 150 – 300 > 300 < 250 250 – 500 > 500

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