BOILER TUBE EXPANDERS

SERIES 116 EXPANDERS

Four Roll - Self Feeding - Flaring Type

Series 116 Expanders
Series 116 Expanders

Features
  • 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

 
 
Tube Assembly
with Mandrel
Part No. 		Spares Reverse Taper Mandrel Expansion
Range*
Inches
OD Wall Standard Mandrel  
Inches (mm) GA (mm) Part No. Square Roll Set Part No. Part No. Square
Inch (mm) Inch (mm)
1-1/2 (38.1) 11-14 (3.0-2.1) 36607 30064 3/4 (19.1) 36653 — — — 1.215-1.389
2 (50.8) 10-16 (3.4-1.7) 36612 30566 36654 20768 3/4 (19.1) 1.680-1.959
2-1/2 (63.5) 10-18 (3.4-1.2) 36616 30567 36655 20771 2.192-2.453
3 (76.2) 9-18 (3.8-1.2) 36620 30569 1 (25.4) 36656 20774 1 (25.4) 2.654-2.954
 
*Expander range is taken at front of thrust collar.

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