Oval Sight Glass Type 336 - PN6- with rtounded Ends for weldingUse:For visual observation of fluid levels in vessels, boilers and silosMaterial:Base flange:1.4571; 1.4404, 1.4462, RSt 37-2 / H IICover flange:1.4571; 1.4404, 1.4462, RSt 37-2 / H IIBolts:DIN 912, A4-70Glass plates:Borosilicate glass acc DIN 7081Soda lime glass acc. To DIN 8903Sealing:Universal Quality (aramid fiber)(Other materials available)Shape:oval longitudinal sightglassfor insertion or weldingNominal size:250 - 670 mmNominal pressure:Operating pressures up to 6 barTemperature:100 ° C or 243 ° Cdepending on the glass and seal selection.