SIGHT GLASSES

model :
Sight Glasses

SGN sight glass is used on the liquid piping of the refrigeration and air conditioning unit to indicate the flow condition of the refrigerant, water cut of the refrigerant and lubricant oil flow condition of the oil return piping on the oil separator.

SGN sight glass is equipped with one moisture indicator, which wil change color to indicate the water cut in the refrigerant.

The modified PTFE sealing is used in SGN sight glass, which is applicable to various refrigerants and oils with perfect sealing performance.

The structure of the SGN sight glass is an explosion-proof press fit and the viewing glass is clear and safety.


Product Description

SGN sight glass is used on the liquid piping of the refrigeration and air conditioning unit to indicate the flow condition of the refrigerant, water cut of the refrigerant and lubricant oil flow condition of the oil return piping on the oil separator.

SGN sight glass is equipped with one moisture indicator, which wil change color to indicate the water cut in the refrigerant.

The modified PTFE sealing is used in SGN sight glass, which is applicable to various refrigerants and oils with perfect sealing performance.

The structure of the SGN sight glass is an explosion-proof press fit and the viewing glass is clear and safety.

 

Features

* Be applicable to HCFC/HFC refrigerants.

* Indicate high water cut in system if any.

* Indicate no overcooling in refrigerant liquid.

* Indicate insufficient charging of refrigerant if any.

* Both welded and threaded connections are available.

 

Technical Parameters :

Applicable Refrigerant                     : HCFC and HFC

Applicable Medium Temperature   : -40C ~ +80C

Max. Operating Pressure                  : 3,5MPa

Max. Allowable Pressure                   : 4,5MPa

Yearly Leakage of Refrigerant        : 2g R22/a

 

Correlation between Water Cut and Color

Water Cut (ppm)
25ºC 43ºC
Green/DRY Medium Color Yellow/WET Green/DRY Medium Color Yellow/WET
R22 / R502 <30 30 ~ 126 >120 <50 50 ~ 200 >200
HFC – 134a <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

 

 Specification

MODEL SIZE
Welded Connection Threaded Connection
SGN – 1/4  ODF SGN – 1/4  SAE 1/4  ( ? 6 )
SGN – 3/8  ODF SGN – 3/8  SAE 3/8  ( ? 10 )
SGN – 1/2  ODF SGN – 1/2  SAE 1/2  ( ? 12 )
SGN – 5/8  ODF SGN – 5/8  SAE 5/8  ( ? 16 )
SGN – 3/4  ODF SGN – 3/4  SAE 3/4  ( ? 19 )
SGN – 7/8  ODF 7/8  ( ? 22 )

 

 Structure

MODEL CONNECTION A ?B C ?D H L1 L THREAD M
(mm) (mm) (mm) (mm) (mm) (mm) (mm)
SGN – 1/4 ODF 10 27 14 6.35 24 8 101
SAE 24 59.5 7/16 – 20UNF
SGN – 3/8 ODF 10 27 14 9.52 24 9 119
SAE 30 70 5/8 – 18UNF
SGN – 1/2 ODF 12 27 17.5 12.7 28.5 12 146
SAE 29 70 3/4 – 16UNF
SGN – 5/8 ODF 12 27 20.5 15.8 29.5 12 146
SAE 31 80 7/8 – 14UNF
SGN – 3/4 ODF 16 32 27 19.05 37 14 173
SGN – 7/8 ODF 16 32 27 22.2 37 19 173

 

lett sight glasses