What is an Electrostatic Precipitator Porcelain Sleeve?
An Electrostatic Precipitator Porcelain Sleeve is a specialized ceramic insulator used in industrial ESP systems to electrically insulate high-voltage discharge electrodes from grounded components. It serves as a protective barrier to maintain the stability and purity of the electric field inside an ESP chamber.
These sleeves are typically installed around shafts or rotors to prevent arcing, leakage currents, and electrical faults caused by continuous dust exposure and high temperatures.
Which One is Best — Polymer Insulators or Porcelain Insulators?
While both polymer and porcelain insulators have their applications, porcelain insulators remain the preferred choice for ESP systems due to their unmatched mechanical robustness, electrical insulation, and temperature resistance.
Property | Porcelain Insulators | Polymer Insulators |
Electrical Insulation | Excellent | Good |
Mechanical Strength | Very High | Moderate |
Temperature Resistance | Up to 300°C | Up to 150°C |
Aging Resistance | Excellent (decades of stability) | Limited lifespan |
Surface Pollution Resistance | High | Moderate |
Maintenance | Low | Medium |
Cost | Medium | High (for high-voltage models) |
Note:For Electrostatic Precipitator systems, porcelain insulators are the better choice because they offer superior high-voltage performance, durability, and cost efficiency in the long run.
Types of Electrostatic Precipitator Porcelain Sleeve
Type No. | Outer Diameter (mm) | Inner Diameter (mm) | Length (mm) | Dielectric Strength (kV/mm) | Max Temp (°C) | Material Grade | Application |
PS-01 | 45 | 25 | 200 | 18 | 250 | High Alumina Ceramic | ESP Support Shaft |
PS-02 | 50 | 28 | 220 | 20 | 280 | Porcelain (Al₂O₃ 60%) | Insulator Base |
PS-03 | 55 | 30 | 250 | 22 | 300 | Alumina Composite | High Voltage Rod |
PS-04 | 60 | 35 | 230 | 19 | 270 | Kaolin Porcelain | Rapping System |
PS-05 | 70 | 40 | 300 | 21 | 280 | Electrical Ceramic | Collector Plate Mount |
PS-06 | 80 | 45 | 320 | 25 | 300 | High-Tensile Porcelain | Shaft Anti-Leakage |
PS-07 | 75 | 38 | 280 | 23 | 260 | Glazed Porcelain | Dust Discharge Line |
PS-08 | 65 | 33 | 240 | 20 | 290 | Alumina Porcelain | Discharge Electrode |
PS-09 | 85 | 50 | 350 | 25 | 310 | Reinforced Ceramic | High Torque Shaft |
PS-10 | Custom | Custom | Custom | ≥20 | 250–320 | OEM Designs | Multi-industry ESPs |
Material Properties of Electrostatic Precipitator Porcelain Sleeve
Manufactured from high-alumina ceramic material, our porcelain sleeves are designed to offer outstanding dielectric properties and high mechanical resistance.
Common Material Composition:
Material Highlights:
High-voltage resistance (>20 kV/mm).
Water absorption rate<0.1%.
Hardness exceeding Mohs 8.
Excellent anti-aging, anti-pollution, and thermal resistance performance.
Comprehensive Technical Table — ESP Porcelain Sleeves
No. | Sleeve Type | Dielectric Strength (kV/mm) | Max Operating Voltage (kV) | Max Operating Temp (°C) | Thermal Shock Cycles (ΔT = 250 °C) | Compressive Strength (MPa) | Bending Strength (MPa) | Water Absorption (%) | Density (g/cm³) |
1 | Standard Glazed Porcelain | 9 – 11 | 30 – 40 | 400 | 15 | 350 | 90 | 0.20 | 2.35 |
2 | Mullite Porcelain | 12 – 14 | 45 – 55 | 950 | 40 | 420 | 110 | 0.10 | 2.60 |
3 | High-Alumina Porcelain (75 %) | 15 – 17 | 60 – 70 | 1100 | 45 | 500 | 130 | 0.05 | 3.10 |
4 | Steatite Ceramic | 10 – 12 | 35 – 45 | 600 | 20 | 380 | 100 | 0.15 | 2.70 |
5 | Long-Rod Extended Sleeve | 11 – 13 | 50 – 65 | 700 | 25 | 400 | 95 | 0.12 | 2.55 |
6 | Flanged / Sealed Porcelain | 10 – 12 | 45 – 60 | 800 | 30 | 390 | 105 | 0.10 | 2.50 |
7 | Threaded Mount Porcelain | 12 – 13 | 50 – 60 | 700 | 35 | 410 | 115 | 0.08 | 2.65 |
8 | Anti-Corona Glazed Sleeve | 14 – 16 | 55 – 65 | 750 | 30 | 430 | 125 | 0.06 | 2.85 |
9 | Cooling-Finned Porcelain | 13 – 14 | 50 – 70 | 900 | 35 | 440 | 120 | 0.09 | 2.80 |
10 | Reinforced Composite Porcelain | 16 – 18 | 65 – 75 | 1000 | 50 | 520 | 140 | 0.04 | 3.20 |
Physical and Mechanical Properties
· Bending Strength: ≥ 90 MPa
· Compressive Strength: ≥ 1000 MPa
· Impact Resistance: Excellent
· Insulation Resistance: > 10¹² Ω
· Thermal Shock Resistance: Can withstand up to 200°C temperature change without cracking
· Hardness: 7–8 Mohs scale
Main Features of Electrostatic Precipitator Porcelain Sleeve
Excellent dielectric strength for dependable voltage insulation.
High mechanical torque capacity to withstand vibration and rapping.
Long-term durability in high-temperature and dusty environments.
Non-conductive surface preventing creepage discharge.
Custom dimensions and configurations available.
Smooth, glazed surface for enhanced cleanliness and minimal dust accumulation.
Low water absorption and high temperature endurance up to 300°C.
Making Process of Electrostatic Precipitator Porcelain Sleeve
1. Raw Material Selection: High-grade kaolin, feldspar and alumina are mixed for optimal insulation quality.
2. Mixing and Shaping: The raw material is finely ground, mixed with water, and shaped using extrusion or molding processes.
3. Drying: The formed sleeves are carefully dried to remove internal moisture.
4. Glazing: A protective glaze layer is applied for improved surface insulation and aesthetics.
5. Firing: Sleeves are fired at temperatures of 1300–1400°C for vitrification and mechanical strength.
6. Inspection: Each porcelain sleeve undergoes electrical, mechanical, and dimensional testing.
7. Packaging: Finished products are securely packed for safe transportation.
Why Choose Senotay’s Electrostatic Precipitator Porcelain Sleeve?
· 25+ Years of ESP-Specific Ceramic Expertise
· In-House R&D Lab with high-voltage testing up to 150 kV
· ISO 9001:2015 & IATF 16949 Certified production
· OEM-Compatible with major ESP brands (GE, Hitachi, Babcock & Wilcox, Lurgi, FLSmidth, etc.)
· Global Export Compliance—RoHS, REACH, and CE-ready documentation
· Fast Lead Times: Standard models ship in 7–10 days; custom designs in 3–4 weeks
