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The steam turbine gland sleeve is a critical structural component in the internal stator-rotor sealing system of steam turbines. Installed inside the cylinder, it cooperates with gland teeth on the rotor to form a labyrinth-type sealing structure. This system primarily controls axial and radial steam leakage at each stage, preventing high-pressure steam outflow or air ingress into low-pressure zones, thereby effectively improving thermal efficiency and operational safety.
Our steam turbine gland sleeves are designed and manufactured in strict compliance with national and industrial standards. They are widely applicable to thermal power units of 300 MW, 600 MW, 1000 MW classes as well as industrial steam turbines.
Product Features
High-precision Structural Design: 3D computational fluid dynamics simulation optimizes sealing cavity structure. Reasonable layout of gland-tooth positions and clearances minimizes steam leakage and improves unit economic performance.
Premium Heat-resistant & Corrosion-resistant Materials: High-strength heat-resistant alloy steel with excellent high-temperature oxidation resistance, creep resistance and corrosion resistance, suitable for long-term service under high-temperature and high-pressure conditions.
Precision Machining & Assembly: Manufactured by CNC turning, milling, wire-cutting and precision welding processes. Critical dimension tolerances including inner bore, split-joint clearance and locating pin holes are controlled within ±0.02 mm. High concentricity after assembly ensures stable operation.
Surface Strengthening Treatment: Optional processes including surface spraying (Ni-based alloy, Co-based alloy), nitriding and laser cladding further enhance wear and erosion resistance, extending service life.
Main Application Scope
Gland sealing systems for high-pressure, intermediate-pressure and low-pressure cylinders of steam turbines in thermal power plants
Shaft-end and diaphragm glands for nuclear-power-plant steam turbines
Replacement and upgrading of sealing parts for industrial driving steam turbines
Energy-saving retrofit projects for aged units
Technical Parameters (Customizable upon Request)
Item
Parameter Range
Material
1Cr13, 1Cr11MoV, FV448, Inconel 718, etc.
Operating Temperature
≤565 ℃ (subject to material grade)
Operating Pressure
High-pressure up to ultra-supercritical conditions
Machining Accuracy
Grade IT6-IT7; surface roughness Ra ≤1.6 μm
Applicable Units
Various domestic and imported steam turbines
Service & Support
We provide comprehensive services including drawing analysis, reverse-engineering of used parts, material selection, manufacturing and on-site assembly guidance. Custom production per drawings, repair of old components and technical upgrading are available to ensure perfect adaptation to on-site working conditions.
Why Choose Us
Over ten-year focus on steam turbine spare-part manufacturing with profound technical accumulation
Equipped with large-scale CNC machining centers and non-destructive testing facilities (UT, MT, PT)
Prompt response, short lead-time, sufficient stock and emergency delivery support
Small as gland sleeves are, they are critical to turbine efficiency and safety. Every product is elaborately manufactured. We commit to supplying power-generation enterprises with reliable and cost-effective turbine sealing solutions. Choosing us means guaranteeing stable operation and high-efficiency power generation.
