About Us
Equipment Built by Engineers, for Engineers
TRANFOVIA is the dedicated equipment division of SIDA, a leading transformer insulation materials manufacturer with 20+ years of industry heritage. We don’t just sell machines — we deliver integrated production solutions backed by deep material know-how and professional after-sales support.
Jessie Feng
CEO Founder
Our Story
From Insulation Materials to Integrated Manufacturing Solutions
2004 — SIDA was founded in Ningbo, China, specializing in transformer insulation materials: laminated wood, DDP pressboard, presspaper, duct strips, and cooling strips.
Over the next two decades, we supplied materials to 500+ transformer manufacturers worldwide, including State Grid, Southern Power Grid, TBEA, ABB, SIEMENS, and WEIDMANN. Our clients kept asking the same question: "Can you also help us source reliable production equipment?"
2024 — To meet this demand, SIDA established TRANFOVIA as a dedicated team for transformer manufacturing equipment. Leveraging our deep understanding of insulation materials and transformer processes, we connect global clients with China's leading equipment brands — XINJIE and DA HUA — while ensuring every machine meets IEC and NEMA standards through professional inspection and responsive after-sales service.
Boost Productivity with Built's Reliable Solutions
"We integrated the automatic high-voltage winding machine and expandable winding mandrel into our line during a capacity expansion. Winding efficiency for large transformer coils improved by nearly 40%. The tension control is precise and consistent, and our first-pass yield rate has climbed noticeably. Technical support responds within a day, which keeps our schedule on track."
"The servo sorting core cutting line has become a critical part of our silicon-steel processing shop. Edge quality is clean and burr-free, and the automated sorting reduces manual handling significantly. Over six months of continuous running, the repeatability has held up well, which matters a lot for our stacked-core tolerance specs."
"Since adding the CNC step-pad block machining center and the multi-layer heat press, we have brought most insulation-part fabrication in-house. Parts we used to outsource with a two-week lead time are now finished in about three days. The machining accuracy and lamination pressure uniformity meet IEC-grade requirements without issue."
"We run the vacuum drying equipment in tandem with the HB-series curing oven for large transformer coils. Temperature distribution is even across the chamber, and the HA-series energy-saving dipping-paint drying oven has made a visible dent in our monthly power consumption. The control interface is straightforward for our operators to manage batch recipes."
"The equipment lineup—from foil winding machines and core stacking tables to coil presses and drying ovens—interfaces well as a system. Commissioning support was hands-on: their technicians supervised mechanical alignment, ran trial batches with us, and trained our staff on daily calibration. It felt like a partnership rather than a one-off sale."
John Engineer
CTO
Lily Mechanic
Product Manager
Max Operator
Project Manager
