Air Cooled Quench Cooler for Heat Treatment Furnace Quench Oil Tank

This air-cooled quench oil cooling unit is specially engineered for closed-loop cooling of hot quenching oil in heat treatment furnaces (carburizing, tempering, normalizing, salt bath quenching lines). It eliminates water circulation completely, zero risk of water leakage mixing with hot quench oil, avoiding severe hazards like steam explosion, fire, oil emulsification and oil deterioration caused by water-cooled heat exchangers.

Working Principle

High-temperature quench oil heated by hot workpieces is drawn out from the bottom of the quench tank via a high-temperature oil circulation pump.

Hot oil flows through thick-walled seamless heat exchange tubes inside the air cooler core.

Multiple heavy-duty axial fans force large-volume ambient air to sweep the external aluminum fin surface of tubes, conducting forced convection heat dissipation.

Cooled oil flows back to the quench tank continuously to stabilize oil temperature within the required process range for consistent quenching hardness and product quality.

Specialized Structural Design for Heat Treatment Quench Oil

Tube Bundle Section

Large-diameter straight thick-wall tubes (carbon steel / SS304 optional): No U-bend dead zones, resistant to sludge, carbon residue and coking dirt from aged quench oil, not easy to clog.

Detachable front & rear header covers: Easy to disassemble for internal flushing and mechanical cleaning of oil sludge without cutting pipelines.

Thermal expansion sliding base: Compensate tube expansion & contraction under 60–180 ℃ oil temperature fluctuation, prevent tube cracking from thermal stress.

Air Cooling Section

Direct-drive industrial axial fans: No transmission belts, low failure rate, low maintenance cost; multi-fan modular design for sufficient air volume.

Optional VFD fan speed control: Automatically adjust air flow according to real-time oil temperature, save power and stabilize cooling effect.

High anti-corrosion aluminum cooling fins, integral powder-coated carbon steel frame, anti-rust for harsh heat treatment workshop environment.

Supporting Matching System (Integrated Skid Type)

High temperature resistant oil circulation pump with bypass strainer to filter iron filings and carbon sludge;

Digital temperature control cabinet with high temperature alarm, auto fan start/stop;

High temperature resistant gaskets and flanges to prevent external oil seepage.