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Danfoss : Sign Glass : SGI 10 3/8" : Flare Connection

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  • ใช้กับการทำความเย็นชนิด HCFC :  ( Refrigerant : HCFC )

  • ใช้ร่วมกับสารหลือลื่นที่สกัดจากธรรมชาติ

  • ใช้ตรวจระดับความชื้นในระบบ

  • การติดตั้งและนำไปใช้งานเป็นแบบ Flare

  • ขนาด 3/8" ทั้งสองด้าน

Danfoss : Sign Glass : SGI 10  3/8" : Flare Connection

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  • Danfoss : Sign Glass : SGI 10  3/8" : Flare 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 :  Flare ext. × ext. Connection
Type Version Connection [in.] Connection [mm] Code no.
SGI 6 Flare ext. × ext. ¼ x ¼ 6 × 6 014-0007
SGI 10 Flare ext. × ext. 3/8 x 3/8 10 × 10 014-0008
SGI 12 Flare ext. × ext. ½ x ½ 12 × 12 014-0075
SGI 16 Flare ext. × ext. 5/8 x 5/8 16 × 16 014-0024
SGI 19 Flare ext. × ext. ¾ x ¾ 19 × 19 014-0028

  
Dimensions [mm] and weights [kg]
Type Version L H H1 B1 øD Net weight
SGI / SGN 6 Flare ext. × ext. 67 24 14 14 27 0.1
SGI / SGN 10 Flare ext. × ext. 82 28 16 19 32 0.2
SGI / SGN 12 Flare ext. × ext. 88 30 18 22 32 0.3
SGI / SGN 16 Flare ext. × ext. 104 37 21 27 37 0.4
SGI / SGN 19 Flare ext. × ext. 110 41 22 32 37 0.5
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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