Customized Labyrinth Steam Seals with High Machining Precision and Stellite Hardfacing for Small Turbines
Labyrinth steam seals are critical static sealing components for small-power industrial steam turbines. Installed between rotors and stators, they form multi-stage labyrinth clearance to restrain steam leakage, reduce energy loss, improve unit thermal efficiency and guarantee stable safe operation.
We provide fully customized steam seal solutions specially tailored for small-power steam turbines including back-pressure turbines, condensing turbines, waste heat turbines, generator drive turbines, and mechanical drive turbines.
- Split arc labyrinth steam seal segments (most widely adopted for small turbines)
- Integral circular steam seal assemblies
- Single-piece labyrinth seal strips
- Optimized high-efficiency seal retrofit components
- Spring-backed steam seal segments
42CrMo, 25Cr2MoV, 12Cr1MoV, stainless steel, cast alloy steel and other heat-resistant materials, matched according to operating temperature, pressure and medium conditions.
- Drawing verification & technical scheme confirmation
- Forging / casting blank preparation
- Normalizing & tempering heat treatment
- Rough CNC machining
- Stress relief annealing
- Precision finish machining of labyrinth teeth, mounting surfaces and bolt holes
- Optional: Stellite alloy hardfacing on sealing tooth tips
- Dimensional inspection, concentricity & flatness testing
- NDT inspection (PT/MT/UT as required)
- Deburring, cleaning and anti-rust packaging
Optimized labyrinth tooth structure and clearance design for small-power turbines with frequent load fluctuation and compact assembly space.
Precision CNC machining ensures uniform labyrinth tooth height, consistent spacing, and precise installation dimensions.
Proper base material selection with optional Stellite hardfacing for enhanced high-temperature erosion and wear resistance.
Suitable for small-batch customized orders with short lead times for urgent maintenance requirements.
Complete documentation including material certificates, heat treatment records, and inspection reports complying with industrial standards.
- Small condensing / back-pressure power generation steam turbines
- Waste heat recovery small turbines
- Mechanical drive turbines (pump, fan, compressor drive)
- Cogeneration industrial turbines used in chemical, textile, paper, metallurgy industries
| Information Type | Details |
|---|---|
| Technical Specifications | Component drawings or dimension parameters |
| Operating Conditions | Turbine rated power, operating temperature & pressure |
| Structure Type | Split segment / integral circular |
| Material Requirements | Required material grade |
| Surface Treatment | Whether Stellite hardfacing on seal teeth is needed |
| Quality Requirements | NDT testing requirements |
| Order Details | Order quantity and delivery timeline |
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