Condensed Catalog Featuring R410A Products Third Edition
Condensed Catalog Featuring R410A Products Third Edition
Condensed Catalog Featuring R410A Products Third Edition
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Technical leaflet<br />
Sight glasses, types SGI, SGN, SGR, SGRN, and SGH<br />
Introduction<br />
Sight glasses are used to indicate:<br />
1. The condition of the refrigerant in the plant<br />
liquid line.<br />
2. The moisture content in the refrigerant.<br />
3. The flow in the oil return line from the oil<br />
separator.<br />
The SGI, SGN, SGR or SGRN can be used for<br />
CFC, HCFC and HFC refrigerants.<br />
The SGI and SGN are fitted with an indicator<br />
which changes color to show the moisture<br />
content in the refrigerant.<br />
The SGR is used to indicate the liquid level<br />
in a receiver or the oil level in a compressor<br />
crankcase.<br />
The SGRN is a sight glass like SGR, but supplied<br />
with a moisture indicator.<br />
The moisture indicators in the sight glasses are<br />
dirt repelling.<br />
Features<br />
Type SGI/SGN/SGRN<br />
n For HCFC and CFC refrigerants<br />
n Indicates too high water contents in the<br />
refrigeration system<br />
n Indication of lack of subcooling<br />
n Indication of refrigerant deficiency<br />
n Flare or solder connection<br />
© Danfoss Inc. 01-07 (USCO)<br />
USCOC.PK.000.C1.22<br />
93
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