What Is a Porosity Testing Machine?
The porcelain shell porosity testing machine is professional testing equipment dedicated to measuring the porosity of porcelain shells for electrical porcelain insulators (also called ceramic insulators).
Why Perform Porosity Testing on Porcelain Insulators?
Reliable insulation performance is critical for power system operation. To prevent premature insulator failure, all electrical porcelain insulators must undergo a complete series of quality tests.
Porosity is one of the key indicators determining insulator quality. Poor firing during production will leave tiny open pores inside porcelain insulators. These porous structures easily absorb ambient moisture, which drastically reduces insulation resistance and triggers leakage current. In severe cases, it leads to total insulation breakdown and unexpected power system faults. Porosity testing is therefore an indispensable quality control procedure for all electrical porcelain products.
porosity test machine for ceramic insulators as per IEC & ANSI
Standard Porosity Test Procedure for Porcelain Insulators
In accordance with ANSI and IEC international standards, the dye penetration method is adopted for porosity inspection of ceramic and porcelain insulator shells. The detailed test steps are as follows:
- Break the insulator shell into standard test specimens.
- Submerge the specimens fully in a 0.5% alcoholic fuchsine dye solution, then apply a constant pressure of approximately 140.7 kg/cm² and maintain the pressure for 24 consecutive hours.
- Remove the test pieces after the holding period and conduct preliminary visual inspection.
- Further fracture the specimens to expose fresh cross-sections. Observe the internal structure closely:
- Obvious dye penetration into the porcelain body indicates excessive porosity, and the product fails the test.
- No dye penetration means the insulator shell meets standard requirements for dense structure and qualified porosity.
Our Porosity Testing Machine for Porcelain Insulators
Developed and manufactured by Contune International Corporation, our porcelain insulator porosity testing machine is widely deployed in production workshops of numerous porcelain insulator manufacturers worldwide.
This computer-controlled testing unit delivers outstanding performance:
- Enables high-precision pressure regulation and stable pressure holding for over 96 hours, far exceeding the duration required by ANSI and IEC standards.
- Features user-friendly operation with intuitive control buttons, ensuring efficient and standardized test execution.
Main Technical Specifications
- Model: CTPT-35
- Accuracy Class: Class 1
- Compression Ratio: 80:1
- Test Medium: Water
- Driving Air Pressure: 0.3 ~ 0.8 MPa
- Testing pressure: 0 ~ 35MPa
- Peak Output Pressure: 40 MPa
- Recommended porosity testing procedure: 10~20MPa (longer life span)
Warranty & Technical Support
Contune International attaches great importance to after-sales service for all testing equipment. We offer comprehensive service policies as below:
- 1-year standard warranty for the entire machine.
- 3 years of free technical support available via phone, email, online inquiry and Skype.
- After the free service period, extended technical support can be obtained by purchasing our dedicated technical service packages.
- VIP customers are entitled to exclusive discounts on replacement spare parts.
Dear seller,
We are interseted in buying Porosity testing machine for porcelain insulators.
Please send me an offer.
Best regards,
Miroslav Bonić