TLEV series Expansion vessel mainly are used for wall hung boiler (combination gas boiler) system, to realize to adjust the pressure and equiponderate the pressure in system. TLEV-06L series Nominal Volume: 6L Max operating temperature: 90 Max operating pressure: 3bar Test pressure: 4.5bar Finished goods air pressure: 1bar Products Color: grey TLEV-08L series Nominal Volume: 8L Max operating temperature: 90 Max operating pressure: 3bar Test pressure: 4.5bar Finished goods air pressure: 1bar Products Color: grey