Home  >  Industrial Supplies  >  Refrigeration & Heat Exchange Parts

Refrigeration Sight glass, 1.1/4" 3/8" 1/2" 5/8" 3/4"ODF FLARE, 2.be applicable to HCFC/HFC refrigerants. - details see: https://www.machineto.com/refrigeration-level-glass-moisture-indicators-refrigeration-sight-glass-10247067

Refrigeration Sight glass

· Both Model SGN sight glass and Model SGS sight glass are 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.

· Model SGN sight glass and Model SGS sight glass are equipped with one moisture indicator, which will change color to indicate the water cut in the refrigerant.

· Model SGR sight glass is used to indicate the level of the refrigerant in the liquid drum and the lubricant oil level in the compressor crankcase.

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

· The structure of both Model SGN sight glass and Model SGR sight glass is an explosionproof press fit and the viewing glass is clear and safety.

· Model SGS sight glass is an independent body structure with conventional sintered glass and O-ring seal.

Features:

Model SGN and Model SGS
· 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.

Model SGR
· Be applicable to HCFC/HFC refrigerants.
· Indicate the liquid level in the liquid drum.
· Indicate the oil level in the compressor crankcase.
· NPT threaded connection

Technical Paramengers:

Applicable Refrigerant	HCFC and HFC	Max. Operating Pressure	3.5MPa
Applicable Medium Temperature	-40°C~+80°C	Max. Allowable Pressure	4.5MPa
Yearly Leakage of Refrigerant	≤2g R22/a

Correlation between Water Cut and Color:

	Water Cut (ppm)
	25°C			43°C
	GReen	Medium color	Yellow	GReen	Medium 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	25~100	>100
R407a	<30	30~140	>140	<60	60~225	>225
R507	<15	15~60	>60	<30	30~100	>110

Specification:

Model of Welded Connection		Size	Model of Threaded Connection		Size
SGN-1/4ODF	SGN-1/4ODF	1/4(Ø6)	SGN-1/4SAE	SGN-1/4SAE	1/4(Ø6)
SGN-3/8ODF	SGN-3/8ODF	3/8(Ø10)	SGN-3/8SAE	SGN-3/8SAE	3/8(Ø10)
SGN-1/2ODF	SGN-1/2ODF	1/2(Ø12)	SGN-1/2SAE	SGN-1/2SAE	1/2(Ø12)
SGN-5/8ODF	SGN-5/8ODF	5/8(Ø16)	SGN-5/8SAE	SGN-5/8SAE	5/8(Ø16)
SGN-3/4ODF	SGN-3/4ODF	3/4(Ø19)	SGN-3/4SAE	SGN-3/4SAE	3/4(Ø19)
SGN-7/8ODF	SGN-7/8ODF	7/8(Ø22)	SGR-3/4NPT		3/4NPT
--	--	--	SGR-G3/4		G3/4

Model		A	B	C	D	E	F	L	S	Tread M	Weight
											SGN	SGS
SGN/SGS-1/4	ODF	9.5	14.5	28	6.5	7	27	102	14	--	105	125
	SAE				--	--	14	6		7/16-20UNF	145	145
SGN/SGS-3/8	ODF				10.1	8	36	119		--	110	155
	SAE	12.5	16.5		--	--	17	70	19	5/8-18UNF	215	195
SGN/SGS-1/2	ODF				12.8	10	46	146			172	150
	SAE	13	18		--	--	19	78	22	3/4-16UNF	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