Custom Double-Tube Transformer Oil/Water Cooler

Custom double‑tube transformer oil‑water coolers are specialized shell‑and‑tube heat exchangers designed for forced cooling of transformer insulating oil. The double‑tube structure provides an extra safety barrier to prevent water‑to‑oil leakage, a critical safety requirement for power transformers. VRCOOLER delivers fully custom‑engineered units, built to customer specifications, transformer datasheets or retrofitting dimensions for new‑build and replacement projects.

Working Principle

Hot transformer insulating oil flows through the annular gap between inner and outer tubes. Cooling water runs inside the inner tube. Heat transfers from transformer oil to cooling water. The double‑wall tube construction isolates oil and water circuits. If inner tube develops pinhole leakage, water will not enter the transformer oil loop, protecting transformer insulation from water contamination.

Key Features

Double‑tube double‑wall safety construction, prevents water ingress into transformer oil system

Custom thermal capacity, pressure rating, size and nozzle layout per transformer requirements

Tube material options: carbon steel, stainless steel, Cu‑Ni alloy for different cooling water quality

Shell material: carbon steel with anti‑corrosive coating or stainless steel

Suitable for continuous 24‑7 heavy‑duty power station transformer operation

Removable tube bundle for inspection and cleaning

Support 1:1 drop‑in replacement for existing transformer oil‑water coolers

Strict hydro‑pressure and leak test before shipment to meet power industry safety standards

Applications

Power station main step‑up transformers

Substation large power transformers

Industrial furnace & rectifier transformers

Off‑grid heavy‑duty transformer cooling

Retrofit upgrade of old transformer cooling systems