Description

The Sapsons ‘AF-3’ / S-114 Flare Type Boiler Tube Expanders are specialized mechanical tube expanders designed for parallel expansion and flaring of boiler tubes in a single operation. They are widely used during the manufacturing, repair, and maintenance of boilers to produce strong, leak-tight tube-to-tube sheet joints.

Description

The AF-3 / S-114 Series incorporates three parallel expanding rolls and three flare rolls, enabling the tool to simultaneously expand the tube inside the tube sheet while forming a flare at the tube end. This dual-action design provides a uniform mechanical joint with improved tube retention and sealing performance.

Features :

• Simultaneous parallel tube expansion and end flaring.
• Three expanding rolls and three flare rolls ensure even expansion and consistent flaring.
• Suitable for boiler tube sizes from 7/8 in. OD to 4½ in. OD.
• Available with Drum, Header, and Short Series mandrels to suit different boiler configurations and restricted-access applications.
• Rugged, precision-machined construction for long service life.
• Produces strong, leak-proof tube joints while minimizing tube wall damage.
• Compatible with pneumatic or electric tube rolling drives.

Applications :

The AF-3 / S-114 expanders are commonly used for:

• Fire-tube boilers
• Water-tube boilers
• Steam drum and mud drum tube expansion
• Economizers
• Air heaters
• Boiler retubing and maintenance
• New boiler fabrication

Advantages :

• Performs expansion and flaring in a single operation, reducing installation time.
• Creates a uniform mechanical seal for improved leak resistance.
• Reduces the need for secondary flaring operations.
• Suitable for maintenance work where reliable tube retention is essential.
• Designed for high durability and repeatable performance.

The AF-3′ / S-114 are models of flare type boiler tube expanders, specialized tools used in boiler maintenance and manufacturing to expand the ends of boiler tubes for a secure, leak-proof fit into tube sheets.