Classification of Steam Turbine Glands
Apr 02, 2026| Based on their installation locations, steam turbine seals are classified into blade seals, diaphragm seals, and shaft-end seals.
Blade Seals
Blade seals comprise radial and axial seals situated between the blade shrouds of the moving blades and the stationary blades or diaphragms, as well as radial and axial seals located between the blade roots of the moving blades and the stationary blades or diaphragms.
Diaphragm Seals
Seals positioned between the inner circumference of the diaphragm (or the inner circumference of the stationary blade ring) and the outer circumference of the rotor or wheel hub, designed to limit steam leakage between turbine stages.
Shaft-End Seals
Grouped seals-configured to accommodate varying pressure drops-that are installed at the points where the rotor passes through the turbine casing at both ends; these are also referred to as shaft seals.