Parallel Expansion Firetube Expanders

KRAIS Tube Expanders

Key Features

Three rolls, Self feeding tube expanders. Flip type thrust collar, accommodate tube sheets of 3/8” to 1” thick. An excellent expander for re-rolling a leaky tubes and for new constructions of Water Tube Boilers, Fire Tube Boilers, Economizers, Air Heaters. Expanders with 4, 5 and 7 rolls are available on request.

Our K70‘s right-angle rolling motors are recommended to be used with this expanders.
Refer to page AK50 Automatic Rolling Motor

Parameters

Tube OD: 2 inch (50,8 mm)

TUBE GAUGE TOOL NO. MIN. EXP. OF TOOL MAX. EXP. OF TOOL ROOLS SET NO. MANDREL NO. MANDREL SQUARE SHORT MANDREL SET
[bwg] [inch] [mm] [inch] [mm] [inch] [mm] [inch] [mm]
10 0,134 3,40 FTPZ-508 1,653 41,99 1,889 47,98 RR23 TK-42 3/4” 19 TKK-42
12 0,109 2,77 FTPZ-508 1,653 41,99 1,889 47,98 RR23 TK-42 3/4” 19 TKK-42
14 0,083 2,11 FTPZ-508 1,653 41,99 1,889 47,98 RR23 TK-42 3/4” 19 TKK-42

Tube OD: 2-1/2 inch (63,5 mm)

TUBE GAUGE TOOL NO. MIN. EXP. OF TOOL MAX. EXP. OF TOOL ROOLS SET NO. MANDREL NO. MANDREL SQUARE SHORT MANDREL SET
[bwg] [inch] [mm] [inch] [mm] [inch] [mm] [inch] [mm]
10 0,134 3,40 FTPZ-635 2,125 53,98 2,440 61,98 RR25 TK-54 3/4” 19 TKK-54
12 0,109 2,77 FTPZ-635 2,125 53,98 2,440 61,98 RR25 TK-54 3/4” 19 TKK-54
14 0,083 2,11 FTPZ-635 2,125 53,98 2,440 61,98 RR25 TK-54 3/4” 19 TKK-54

Tube OD: 3 inch (76,2 mm)

TUBE GAUGE TOOL NO. MIN. EXP. OF TOOL MAX. EXP. OF TOOL ROOLS SET NO. MANDREL NO. MANDREL SQUARE SHORT MANDREL SET
[bwg] [inch] [mm] [inch] [mm] [inch] [mm] [inch] [mm]
10 0,134 3,40 FTPZ-762 2,559 65,00 2,952 74,98 RR29 TK-65 3/4” 19 TKK-65
12 0,109 2,77 FTPZ-762 2,559 65,00 2,952 74,98 RR29 TK-65 3/4” 19 TKK-65
14 0,083 2,11 FTPZ-762 2,559 65,00 2,952 74,98 RR29 TK-65 3/4” 19 TKK-65

Other sizes and other roll length available on request.