As part of the project for Zaporizhzhia Transformer Plant PJSC (Zaporizhzhia), electric drying ovens for convective drying of coatings were supplied, designed to meet the customer’s specific technical requirements.
Start of Collaboration
In 2013, Zaporizhzhia Transformer Plant PJSC approached Techservice VEKO and Partner GmbH LLC with a request to supply electric ovens for convective drying of coatings applied in the manufacture of electrical equipment. As part of the collaboration, two custom-designed ШКСПП.00.00ОПС ovens were developed and delivered: one with a 1.2 m³ capacity and the other with a 3.0 m³ capacity. These ovens were manufactured in accordance with the customer’s technical specifications, taking into account the specifics of working with solvents (R-4, R-5, acetone, toluene) and ensuring compliance with fire safety requirements for premises classified as Category B-Ib under PUE standards.
Equipment Features
The supplied electric ovens (ШКСПП.00.00ОПС) are designed for convective drying of electro-insulating varnishes (EP-730, ML-912, KO-916K) and enamels used in the production of electrical components. Key characteristics:
- ШКСПП.00.00ОПС Oven, 1.2 m³: A compact model for small batches, maintaining temperature fluctuations of ±5°C throughout the chamber volume, ensuring consistent coating quality.
- ШКСПП.00.00ОПС Oven, 3.0 m³: Designed for larger batches, maintaining temperature fluctuations of ±5°C, delivering high drying quality.
Both ovens were custom-designed to meet the client’s production needs. They are equipped with precise temperature control systems, ensuring consistent coating quality and up to 50% energy savings. The ovens are constructed from stainless steel with thermally insulated sandwich panels filled with fire-resistant mineral wool, ensuring safety and operational efficiency. The automation system, housed in a separate control panel, includes a programmable PID controller (TRM-251), a dual-channel timer (UT24), and a gas analyzer (SHCHIT-3) for monitoring solvent vapor concentrations, ensuring safe operation even with volatile substances.
Key technical features include:
- Maximum heating temperature of 250°C, suitable for drying products with electro-insulating coatings.
- Air exchange cyclicity (±240 cycles/hour) and air velocity in the working zone (0.16–0.22 m/s), ensuring uniform drying.
- Heat exchanger with thick-film heaters (TPEN-1.5/15) and a ventilation unit (VTS-14-46 No. 2 with a 0.37 kW motor), contributing to energy efficiency.
- Pneumatic damper drive and mechanical exhaust damper for effective vapor removal, reducing the risk of hazardous concentration buildup.
- Automation system with emergency alarms triggered by open doors, excessive temperature, or vapor concentrations (20% or 45%), ensuring personnel safety.
Advantages
- Reliability: The 1.2 m³ oven has operated without failures since 2013—over 5 years as of the 2017 review.
- Stability: Temperature fluctuations of ±5°C throughout the chamber volume.
- Energy Savings: 50% reduction in electricity consumption due to energy-efficient solutions.
- Customization: Ovens designed to meet the client’s specific needs, enhancing production efficiency.
- Safety: Compliance with GOST 15150-69 (UHL 4 climatic standard) and PUE, with a double-seal door system (fiberglass cord and silicone sealant) to prevent vapor leakage.
- Ease of Maintenance: Modular design facilitates routine maintenance, including air duct cleaning and filter replacement, as outlined in the equipment manual.
- Durability: Oven lifespan before major overhaul is 3 years, with a nominal service life of 10 years, provided operating conditions are followed.
Client Feedback
Zaporizhzhia Transformer Plant PJSC highly praised the equipment quality and collaboration with TWEKO, confirming the ovens’ reliability after years of operation:
Conclusion
The project for Zaporizhzhia Transformer Plant PJSC, completed in 2013, demonstrated TWEKO’s ability to create reliable equipment for drying electro-insulating coatings. The custom-designed ШКСПП.00.00ОПС ovens provided consistent quality, energy efficiency, and durability, positively impacting the client’s production processes. An additional advantage is the ability to program up to three technological profiles in the TRM-251 thermoregulator, enabling flexible drying settings for various coating types. The data archiving system (MSD-200 module) records operational parameters (temperature, vapor concentration, emergency states), simplifying quality control and diagnostics. The equipment comes with a 12-month warranty, extendable to 15 months if installed under the manufacturer’s supervision, reflecting TWEKO’s confidence in its product quality.
With a flexible approach and expertise in complex projects, we are ready to offer solutions tailored to your production needs. If you are seeking high-quality ovens for drying coatings, contact TWEKO. We guarantee a professional approach, innovative solutions, and exceptional quality.
