Model SG Sight Glass - ZHEJIANG HONGSEN MACHINERY CO.,LTD

Model SG Sight Glass

Product Description
Product Model
Technical Parameters

Product Description:

·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 bothModel 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 explosion-proof 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.

Product Model:

Model of Welded Connection		Size	Model of Threaded Connection		Size
SGN-1/4 ODF	SGN-1/4 ODF	1/4(Φ6)	SGS-1/4 SAE	SGS-1/4 SAE	1/4(Φ6)
SGN-3/8 ODF	SGN-3/8 ODF	3/8(Φ10)	SGS-3/8 SAE	SGS-3/8 SAE	3/8(Φ10)
SGN-1/2 ODF	SGN-1/2 ODF	1/2(Φ12)	SGS-1/2 SAE	SGS-1/2 SAE	1/2(Φ12)
SGN-5/8 ODF	SGN-5/8 ODF	5/8(Φ16)	SGS-5/8 SAE	SGS-5/8 SAE	5/8(Φ16)
SGN-3/4 ODF	SGN-3/4 ODF	3/4(Φ19)	SGS-3/4 SAE	SGS-3/4 SAE	3/4(Φ19)
SGN-78 ODF	SGN-78 ODF	7/8(Φ22)	SGR-3/4NPT		3/4NPT
——	——	——	SGR-G3/4		G3/4

Technical Parameters:

Applicable Refrigerant:	HCFC and HFC
Applicable Medium Temperature:	-40℃~+80℃
Max.Operating Pressure	4.5MPa
Max.Allowable Pressure	6.8MPa
Yearly Leakage of Refrigerant	≤2g R22/a

Note: For the fully enclosed compressor, generally the allowable water cut is in a range 30~75ppm, but for other types of compressor, the water cut will be higher slightly. For an effective protection, it is necessary to monitor the indicator carefully and replace the drier immediately if the color is changed into yellow.

Correlation betwen Water Cut and Color：

	Water Cut(ppm)
	25℃			43℃
	Green/DRY	Medium Color	Yellow/WET	Green/DRY	Medium Color	Yellow/WET
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
R407c	<30	30～140	>140	<60	60～225	>225
R507	<15	15～60	>60	<30	30～110	>110

Structure：

Model		A	B	ΦC	ΦD	E	F	L	S	Thread M	Weight(g)
Model		A	B	ΦC	ΦD	E	F	L	S	Thread M	SGN	SGS
SGN/SGS-1/4	ODF	9.5	14.5	28	6.5	7	27	102	14	——	105	125
SGN/SGS-1/4	SAE				——	——	14	64		7/16-20UNF	145	145
SGN/SGS-3/8	ODF				10.1	8	36	119		——	110	155
SGN/SGS-3/8	SAE	12.5	16.5		——	——	17	70	19	5/8-18UNF	215	195
SGN/SGS-1/2	ODF	12.5	16.5		12.8	10	46	146	19	——	170	150
SGN/SGS-1/2	SAE	13	18		——	——	19	78	22	3/4-16UNF	240	210
SGN/SGS-5/8	ODF	13	18		16.1	14	46	152	22	——	190	220
SGN/SGS-5/8	SAE	15	20	31.5	——	——	20	78	24	7/8-14UNF	350	300
SGN/SGS-3/4	ODF	15	20		19.1	16	51	167	24	——	270	230
SGN/SGS-3/4	SAE	18	23		——	——	23	94	29	1-1/16-14UNS	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	90
SGR-G3/4	G	10.5	13	——	——	——	——	——	32	G3/4	70

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.