DEVICE FOR WATCHING PROCESS IN APPARATUS UNDER PRESSURE Russian patent published in 1994 - IPC

FIELD: inspection technology. SUBSTANCE: device has main case accommodating optically transparent member placed between gaskets and sealed in case by means of additional case, second optically transparent member placed between gaskets inside additional case and sealed by means of cover whose central hole receives detachable dummy plug that seals additional case by means of gasket; device also has pressure relief line with valve communicating with additional case and pressure gage with valve mounted upstream of it. Device has definite proportion of dimensions. EFFECT: improved design. 2 cl, 1 dwg