Sight Glasses

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Sight Glasses
The NSG series of sight glasses are used to show:
1. The condition of the refrigerant in the plant liquid line
2. The moisture content in the refrigerant
3. The flows in the oil return line from the oil separator.

Description
These sight glasses are outfitted with an indicator that will change color to show the moisture content in the refrigerant. The indicator will flash dark blue for low water levels, and pink for high water levels. When the light is pink, users should determine the cause, or change the filter dryer in the system.

Technical Data of Sight Glasses
Max. working pressure : 3.5MPa
Max. working temperature : 80℃
Available medium :R134a、R22、R407C and R404A/R507

Moisture Content (Unit: P.P.M)

Refrigerant	R22			R134a
Liquid temperature	24℃	38℃	52℃	24℃	38℃	52℃
Blue (dry)	< 30	< 45	< 60	< 30	< 45	< 60
Light blue (warning)	30 ~ 120	45 ~ 180	60 ~ 240	30 ~ 100	45 ~ 160	60 ~ 220
Pink (moisture)	> 120	> 180	> 240	> 100	> 160	> 220

Type & Data

Connectin form	Model	Connection size		Dimension (mm)
Connectin form	Model	in.	mm	Length	Width	Height
Solder ODF	NSGWW6		Φ6	120	35	35
	NSGWW1/4	1/4"		120	35	35
	NSGWW10		Φ10	120	35	35
	NSGWW3/8	3/8"		120	35	35
	NSGWW12		Φ12	120	35	35
	NSGWW1/2	1/2"		120	35	35
	NSGWW16		Φ16	140	35	40
	NSGWW5/8	5/8"		140	35	40
	NSGWW19		Φ19	147	35	40
	NSGWW3/4	3/4"		147	35	40
	NSGWW22		Φ22	160	35	40
	NSGWW7/8	7/8"		160	35	40
	NSGWW28		Φ28	170	35	40
	NSGWW1-1/8	1-1/8"		170	35	40
Flare nuts	NSGSS6		Φ6	80	35	35
	NSGSS1/4	1/4"		80	35	35
	NSGSS10		Φ10	95	35	35
	NSGSS3/8	3/8"		95	35	35
	NSGSS12		Φ12	95	35	35
	NSGSS1/2	1/2"		95	35	35
	NSGSS16		Φ16	95	35	35
	NSGSS5/8	5/8"		95	35	35

Note: SGSF, SGSU, SGUU, SGWD series are special types, please contact us directly.

Ordering Information

Model	NSG	Connection	Size
Expalnations	Sight Glass Valve Code	WW= ODFXODF	Connection size
		SS=FlareXFlare
		SF=Female flareXMale flare
		SU=Female flareXFemale flare swivel nuts
		UU=Female flare swivel nuts
		WD=Straight thru configuration