Spiral Round Flat Oval Duct Machine — New | BLKMA, Ma'anshan, China | Machine Matcher

The BLKMA Spiral Round Flat Oval Duct Machine transforms both smooth and corrugated round spiral duct into flat-oval ductwork, giving fabricators a way to produce this increasingly popular duct shape without needing an entirely separate production system. The machine is controlled via PLC, with an LCD unit on the operator's panel storing all set parameters for easy recall — reducing setup time when switching between different duct specifications.

Designed to satisfy most ductwork requirements across the HVAC industry, the machine adapts to a broad range of round duct sizes — from 18" (450mm) up to 60" (1500mm) — and efficiently transforms them into flat-oval ductwork to meet varying project needs. Its forming capabilities align seamlessly with workflows involving a standard spiral duct machine, supporting smooth transitions between round and flat-oval duct production while maintaining accuracy and consistency.

Why Choose Flat-Oval Duct Production?

Flat-oval ductwork offers genuine practical advantages over round duct in space-constrained installations — it can fit into shallower ceiling voids and wall cavities while still delivering comparable airflow performance, making it a popular choice for renovation projects and buildings with limited overhead clearance.

Rather than requiring a completely separate production line, BLKMA's ovalizer integrates directly with existing spiral duct machine workflows — meaning fabricators who already produce round spiral duct can add flat-oval capability without duplicating their core forming equipment, extending the value of their existing spiral duct investment.

Machine Specifications

• Thickness range: 0.4–1.2mm
• Maximum duct length: 3000mm
• Arm range: Minimum diameter 500–1500mm
• Die specifications: φ150, φ200, φ250, φ300, φ350, φ400, φ450, φ500mm
• Tray specifications: 50, 100, 200, 300, 400, 500, 600mm
• Motor power: 7.5kW
• Weight: 2200kg
• Dimensions: 6000mm × 1300mm × 1200mm

Condition Available: New

Key Features

• Transforms both smooth and corrugated round spiral duct into flat-oval duct
• PLC control with LCD parameter storage for quick recall
• Wide size range: 18" (450mm) to 60" (1500mm) round duct input
• Seamless compatibility with standard spiral duct machine workflows
• Stable, precise shaping performance for consistent results

Applications

• HVAC ductwork requiring flat-oval profiles
• Renovation projects with limited overhead clearance
• Commercial and residential ventilation systems
• General duct fabrication workshops adding flat-oval capability

Who This Machine Is For

• HVAC duct manufacturers and fabricators
• Contractors serving space-constrained installation projects
• Ventilation equipment suppliers looking to add flat-oval duct capability to existing spiral duct production

Frequently Asked Questions

What does this machine actually do?
It transforms round spiral duct (both smooth and corrugated) into flat-oval ductwork, using PLC-controlled forming with stored parameters for quick recall between jobs.

What size range does this machine cover?
The machine adapts to round duct sizes from 18" (450mm) up to 60" (1500mm) in diameter.

Does this require separate equipment from my existing spiral duct machine?
No. The ovalizer's forming capabilities align seamlessly with standard spiral duct machine workflows, supporting smooth transitions between round and flat-oval production.

Why would I want flat-oval duct instead of round duct?
Flat-oval ductwork fits into shallower ceiling voids and wall cavities than round duct, making it popular for renovation projects and buildings with limited overhead clearance, while maintaining comparable airflow performance.

What material thickness can this machine handle?
The machine processes material from 0.4mm to 1.2mm thickness.

Is financing or staged payment available?
Yes. A deposit secures your order and begins production, with the remaining balance due only once your machine has been built, inspected, and is ready to ship.

Should I buy new or used?
This model is available new, from a manufacturer with duct machinery experience since 1994.