Sievert 3525 Cyclone Burner 25mm – 352503 | Soft Soldering to 70mm | Brazing to 32mm | Pro 86/88
The Sievert Pro 86/88 system’s large cyclone burner for use with larger pipe diameters. This model provides a rotating wrap-around flame for an even, all-round heating process. Soft soldering for pipe sizes up to 70mm (400°C). Brazing for pipe sizes up to 32mm (720°C). Directly connects to the Pro 86/88 handle — does not require a neck tube. 10.3 kW, 800 g/h @ 2 bar; 25 mm, 80 mm integrated neck @ 30°.
Key Features & Benefits
Rotating Wrap-Around Flame for Larger Pipes — same rotating wrap-around flame as the 3524 — the most efficient type of burner for pipe soldering — enlarged version for larger pipe sizes.
Soldering to 70mm Dia. Copper Tubes (400°C) — Largest diameter that can be soldered by any Pro 86/88 cyclone burner — covers all standard copper tubing used in both residential and commercial applications.
Brazing to 32mm Dia. Copper Tubes (720°C) — Wider brazing range than the 3524 (18mm) — covers 15mm, 22mm, and 28mm commercial tubing brazing.
10.3 kW / 800g/h @ 2 Bar — Three or four times more power than the 3524 for rapid heat transfer to larger diameter welds.
Direct Handle Mounting — No Neck Tube Needed — A G 3/8" -19 threaded connection allows mounting directly to the Pro 86/88 handle without a neck tube.
Stainless steel and brass construction.
Ideal For
Soft soldering large copper pipe up to 70mm
Brazing copper pipe up to 32mm
Commercial & industrial plumbing installations
Heating engineers working on large pipe sizes
Sievert Pro 86 (3486) & Pro 88 (3488) handle owners
Upgrading from the 3524 (19mm) for larger pipe work
Large-diameter cyclone burner for the Pro 86/88 system — soldering to 70mm, brazing to 32mm. The Sievert 3525 Cyclone Burner is in stock and ready to ship. Handle sold separately.
Specification
Sievert 3525 Cyclone Burner - 25mm Specification
Brand
Sievert
Article Number
352503
Flame Type
Cyclone – rotating all-round heat transfer
Burner Diameter
25mm
Heat Output
10.3 kW at 2 bar
Working Pressure
2 bar
Gas Consumption
800 g/h at 2 bar
Soft Soldering Capability
Up to 400°C – max pipe diameter 70mm
Brazing Capability
Up to 720°C – max pipe diameter 32mm
Handle Connection
G 3/8"-19 – direct to Pro 86/88 handle, no neck tube needed
Integrated Neck Tube
80mm at 30°
Material
Stainless steel & brass
Compatible Handles
Sievert Pro 86 (3486) & Pro 88 (3488)
Suitable Applications
Soft soldering & brazing – large-diameter pipe work
Features
Sievert 3525 Cyclone Burner - 25mm Features
Cyclone Rotating Flame for Large Pipe — Same rotating wrap-around flame as the 3524 — the most efficient burner type for pipe soldering — scaled up for larger pipe diameters.
Soft Soldering to 70mm Pipe Diameter (400°C) — The largest soft soldering capacity of any Pro 86/88 cyclone burner — covers all common domestic and commercial copper pipe sizes.
Brazing to 32mm Pipe (720°C) — Significantly wider brazing capacity than the 3524 (18mm) — covers 15mm, 22mm and 28mm commercial pipe brazing.
10.3kW / 800g/h at 2 Bar — More than three times the output of the 3524 for fast heat delivery to large diameter joints.
Direct Pro Handle Connection — No Neck Tube Required — G 3/8"-19 thread connects directly to the Pro 86/88 handle.
