Safety sight glass is used in situations where it is necessary to inspect visually processes in tanks, under pressure, with thermal or chemical load.
Application of special tempered glass of good chemical resistance as well as exceptional purity and uniformity assures a high safety level.
| GLASS TYPE | MAX.WORKING TEMP. | THERMAL EXPANSION COEFFCIENT |
| FLOAT | 90º C | 9,0·10-6 /K |
| TEMPERED FLOAT | 280º C | 9,0·10-6 /K |
| BOROFLOAT | 450º C | 3,3·10-6 /K |
| TEMPERED BOROFLOAT SG |
340º C | 4,0·10-6 /K |
| CERAMIC GLASS | 700º C | -3,3-0,15·10-6 /K |
| QUARTZ GLASS | 1100º C | 5,3·10-6 /K |