BOILER TUBE EXPANDERS

• Four Roll
• Self Feeding
• Flaring Type
• Non-Parellel Expansion up to 3/4-Inch Tubesheet

This non-parallel, self-feeding expander features a design embodying four (4) expanding rolls and two (2) flare rolls. It simultaneously flares and rolls an unusually fine surface with a minimum amount of indentation by the flare rolls. The flaring operation is ideal for HRT and other fire tube boilers where final beading of tube ends is the practice.

Mandrels and rolls are of alloy steel ground after hardening, to a fine surface finish. The rolls of these expanders are self-retained. The self-retained roll feature makes this expander suitable for use with reverse taper mandrels for far end tube expanding. View service manual SM-34