Brief introduction
1,SGN/SGS type sight glass is used for liquid channel of refrigeration and air conditioning equipment .Used for showing the flow condition and water content of refrigerant, the oil flow condition in the oil returning channel of the oil separator.
2, SGN/SGS type sight glass has a moistindicator indicate the water content in refrigerant through changeing color.
3, SGR type sight glass is used for the refrigerant's liquid level of the liquid reservior and the oil's liquid level of the compressor crankcase.
4, SGN/SGR type sight glass all use modified PTFE sealing ,material, is suitable for various refrigerant and lubricant, with good sealability.
5, SGN/SGR type sight glass adopt anti-explosion crimping structure, the observation window is clear and safe.
6, SGS type sight glass adopt the traditional glass burn-back O-Ring sealing and independent sight glass structure.
Function and characteristics
SGN/SGS type: SGR type:
1, Used for HCFC/HFC refrigerant. 1, CFC/HFC refrigerant
2, Showing exorbitant moisture content. 2, Have liquid level in reservior
3, Without condensate depression indication for refrigerant liquid. 3, Liquid level in compressor crankcase
4 Showing the refrigerant charge not enough. 4, NPT screw connection
5, Two connectors of welded junction and screw type.
The relationship between the moisture content and color
Moisture content (‰) | ||||||
25°C | 43°C | |||||
Green | Intermediate color | Yellow | Green | Intermediate color | Yellow | |
R22/R502 | <30 | 30-120 | >120 | <50 | 50-200 | >200 |
HFC-134A | <30 | 30-100 | >100 | <45 | 45-170 | >170 |
R404A | <20 | 20-70 | >70 | <25 | 20-100 | >100 |
R407A | <30 | 30-140 | >140 | <60 | 60-225 | >225 |
R507 | <15 | 15-60 | >60 | <30 | 30-100 | >110 |
Model selection
Welded junction | Standard | Screw type | Standard | ||
SGN-1/40DF | SGN-1/40DF | 1/4(6) | SGN-1/4SAE | SGN-1/4SAE | 1/4(6) |
SGN-3/80DF | SGN-3/80DF | 3/8(10) | SGN-3/8SAE | SGN-3/8SAE | 3/8(10) |
SGN-1/20DF | SGN-1/20DF | 1/2(12) | SGN-1/2SAE | SGN-1/2SAE | 1/2(12) |
SGN-5/80DF | SGN-5/80DF | 5/8(16) | SGN-5/8SAE | SGN-5/8SAE | 5/8(16) |
SGN-3/40DF | SGN-3/40DF | 3/4(19) | SGN-3/4SAE | SGN-3/4SAE | 3/4(19) |
SGN-7/80DF | SGN-7/80DF | 7/8(22) | SGR-3/4NPT | 3/4NPT | |
— — | — — | — — | SGR-G3/4 | G3/4 |
Model | A | B | C | D | E | F | L | S | Screw type | Weight | ||
SGN | SGS | |||||||||||
SGN/SGS-1/4 | ODF | 9.5 | 14.5 | 28 | 6.5 | 7 | 27 | 102 | 14 | —— | 105 | 125 |
SAE | — | — | 14 | 6 | 7/8-14UNF | 145 | 145 | |||||
SGN/SGS-3/8 | ODF | 10.1 | 8 | 36 | 119 | —— | 110 | 155 | ||||
SAE | 12.5 | 16.5 | — | — | 17 | 70 | 19 | 7/8-14UNF | 215 | 195 | ||
SGN/SGS-1/2 | ODF | 12.8 | 10 | 46 | 146 | 172 | 150 | |||||
SAE | 13 | 18 | — | — | 19 | 78 | 22 | 7/8-14UNF | 240 | 210 | ||
SGN/SGS-5/8 | ODF | 16.1 | 14 | 46 | 152 | 190 | 220 | |||||
SAE | 15 | 20 | 31.5 | — | — | 20 | 78 | 24 | 7/8-14UNF | 350 | 300 | |
SGN/SGS-3/4 | ODF | 19.1 | 16 | 51 | 167 | 270 | 230 | |||||
SAE | 18 | 23 | — | — | 23 | 94 | 29 | 1-1/16-14UNF | 545 | 440 | ||
SGN/SGS-7/8 | ODF | 16.5 | 21.5 | 22.3 | 17 | 54 | 173 | 27 | 315 | 290 | ||
SGR-3/4NPT | NPT | 10.5 | 13 | — | — | — | — | 32 | 3/4NPT | 70 | ||
SGR-G3/4 | G | G3/4 | 70 |
SG type Sight glass for refrigeration parts