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The compact, space saving vertical four-pass shock-proof design has no tubes to loosen or burn out. The Hurst Vertical Tubeless Boiler allows convenient access to "eye high" burner and solid-state controls for trouble free operation. Factory assembled and fully automatic. UL and ASME CSD-1 approved. Simple and inexpensive to install.

Four-Pass Design

• The gases leaving the furnace are split four ways and travel through four individual serpentine fin passages to the stack outlet.
• Each quarter of the heat travels its own four-pass path (see illustration below).
• Heat transfers evenly to the fins and boiler shell, eliminating the metal stress due to uneven heat transfer common in other designs.

More Steam Storage

• Capacity to handle swing and spike loads – quick recovery - quick response.
• The larger steam-release surface is calmer, reducing carry over of unevaporated water.
• The resulting drier steam also reduces system scaling.
• In addition, dry steam helps to eliminate unnecessary extra condensate. Energy and fuel are saved. Longer life results.

Inspection Access

• The waterside openings are located in the most effective positions. The lower handholes offer far better access for both cleanout and inspection.
• These more functional locations avoid the obstructing handhole “tunnels" used by our competitors.
• The top opening offers a strategic view of the furnace crown sheet.

Available Accessories

• The Hurst 4VT Cyclone is available in a complete package with an optional compact boiler-mounted feedwater system for a finished wired and piped, ready-to-fire unit.
• Blowdown separators are also available.

Options and Alternatives

Hurst specializes in customizing your boiler. The Cyclone can be equipped to suit a wide variety of installations and specifications. We will help direct you to the most cost-effective models and features.

Additional Information