PZ Series

KRAIS Tube Expanders

Recommended roll length for varies tube sheet thickness:

Tube Sheet Thickness Roll Length
1/2” - 3/4” (12mm - 19mm) 40
7/8” - 1-1/4” (22mm - 32mm) 50
1-3/8” - 1-3/4” (35mm - 45mm) 60
1-7/8” - 2-1/4” (48mm - 58mm) 80
2-3/8” - 2-3/4” (60mm - 70mm) 90

Key Features

Three Expansion Rolls, Self feeding tube expanders. An excellent expander for re-rolling leaky tubes and for new constructions of water tube boilers, fire tube boilers, economizers and 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. K70 Right Angle Rolling Motor

If you order expander KS-54 with rolls of 50 mm you should specify KS-5450, with 60 mm KS-5460… Short mandrel set with shorter length on request.

For this expanders there are available special bottle type rolls which reduce the effective roll length. Max. for 10 mm from the front of the roll.

Parameters

TOOL NO. EXP. RANGE STD. ROLL LENGTH OAL EXPANDER SIZE OTHER ROLL LENGTH ROLLS EXPANSION NO. MANDREL NO. MANDREL O.A.L SHORT MANDRELL SET (3 PCS.) SMS O.A.L MANDREL SQUARE
[mm] [inch] [mm] [inch] [mm] [inch] [mm] [inch] [mm] [inch] [mm] [inch]
min max min max
PZ-19 19 22 0,75 0,87 42 1,654 1”11-12 GA 30,50 1,18; 1,97; RR12 TK19 195 7,677 - - - 12,7 1/2
PZ-20 20 23 0,79 0,93 42 1,654 1”13-16 GA 30,50 1,18; 1,97; RR12 TK20 208 8,189 - - - 12,7 1/2
PZ-22 22 25 0,87 0,98 42 1,654 1-1/8”12-14 GA 30,50 1,18; 1,97; RR12 TK22 220 8,661 - - - 12,7 1/2
PZ-23 23 26 0,91 1,02 42 1,564 1-1/8”14-16 GA 30,50 1,18; 1,97; RR13 TK23 220 8,661


12,7 1/2
PZ-24 24 27 0,94 1,06 42 1,564 1-1/8”15-17 GA 30,50 1,18; 1,97; RR13 TK24 220 8,661


12,7 1/2
PZ-25 25 28 0,98 1,14 42 1,654 1-1/8”16 GA 30,50 1,1 8; 1,97; RR13 TK25 220 8,661 - - - 12,7 1/2
PZ-27 27 30 1,06 1,18 42 1,654 1-1/4”12-17 GA 30,50 1,1 8; 1,97; RR15 TK27 220 8,661


12,7 1/2
PZ-28 28 32 1,10 1,26 42 1,654 1-1/4”16 GA 30,50,60,70 1,18; 1,97; 2,36; 2,76; RR16 TK28 285 11,220 - - - 19,0 3/4
PZ-29 29 33 1,14 1,34 42 1,654 1-1/2”7-11 GA 30,50,60,70 1,18; 1,97; 2,36; 2,76; RR16 TK29 285 11,220 - - - 19,0 3/4
PZ-30 30 34 1,18 1,38 42 1,654 1-1/2”10-12 GA 30,50,60,70 1,18; 1,97; 2,36; 2,76; RR16 TK30 285 11,220 - - - 19,0 3/4
PZ-32 32 36 1,26 1,42 42 1,654 1-1/2”13-16 GA 30,50,60,70 1,18; 1,97; 2,36; 2,76; RR17 TK32 260 10,236 - - - 19,0 3/4
PZ-33 33 38 1,99 1,49 42 1,65 1-1/2”13-20GA 30,50,60,70 1,18; 1,97;2,36; 2,76; RP33 TK33 290 11,41 TKK33 181,00 7,12 19,0 3/4
PZ-35 35 41 1,38 1,61 42 1,654 1-3/4”8-9 GA 50,60,70,80 1,97; 2,36; 2,76; 3,15 RR21 TK37 310 12,205 TKK37 188,00 7,402 19,0 3/4
PZ-37 37 43 1,46 1,69 42 1,654 1-3/4”10-16 GA 50,60,70,80 1,97; 2,36; 2,76; 3,16 RR22 TK37 310 12,205 TKK37 188,00 7,402 19,0 3/4
PZ-39 39 45 1,53 1,77 42 1,654 1-3/4”12-18 GA 50,60,70,80 1,97; 2,36; 2,76; 3,16 RR40 TK37 310 12,205 TKK37 188,00 7,402 19,0 3/4
PZ-40 40 46 1,57 1,81 50 1,969 2”7-10GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,15; 3,54; 3,94; RR40 TK42 310 12,205 TKK42 205,00 8,071 19,0 3/4
PZ-42 42 48 1,65 1,89 50 1,969 2”11-12 16 GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,15; 3,54; 3,94; RR23 TK42 310 12,205 TKK42 205,00 8,071 19,0 3/4
PZ-44 44 50 1,73 1,97 50 1,969 2”13-1 5 GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,15; 3,54; 3,94; RR23 TK44 310 12,205 TKK44 205,00 8,071 19,0 3/4
PZ-47 47 54 1,85 2,13 50 1,969 2”16GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,15; 3,54; 3,94; RR24 TK47 338 13,307 TKK47 218,00 8,583 19,0 3/4
PZ-49 49 56 1,93 2,20 50 1,969 2-1/4”10-12GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,15; 3,54; 3,94; RR24 TK49 338 13,307 TKK49 218,00 8,583 19,0 3/4
PZ-52 52 59 2,05 2,32 50 1,969 2-1/4”14-1 6 GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,15; 3,54; 3,94; RR25 TK49 338 13,307 TKK49 218,00 8,583 19,0 3/4
PZ-54 54 62 2,13 2,44 50 1,969 2-1/2”11-12GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,15; 3,54; 3,94; RR26 TK54 375 14,764 TKK54 230,00 9,055 19,0 3/4
PZ-57 57 66 2,24 2,60 50 1,969 2-1/2”13-1 6 GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,15; 3,54; 3,94; RR27 TK57 395 15,551 TKK57 235,00 9,252 19,0 3/4
PZ-60 60 69 2,36 2,72 50 1,969 2-3/4”7-1 1GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,15; 3,54; 3,94; RR28 TK57 395 15,551 TKK57 235,00 9,252 19,0 3/4
PZ-65 65 74 2,56 2,91 50 1,969 3”7-11GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,15; 3,54; 3,94; RR29 TK65 395 15,551 TKK65 235,00 9,252 19,0 3/4
PZ-68 68 78 2,68 3,07 50 1,969 3”12-1 3 GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,15; 3,54; 3,94; RR30 TK72 425 16,732 TKK72 255,00 10,039 25,40 1
PZ-72 72 82 2,83 3,23 50 1,969 3-1/4”7-12 GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,15; 3,54; 3,94; RR31 TK72 425 16,732 TKK72 255,00 10,039 25,40 1
PZ-77 77 87 3,03 3,43 50 1,969 3-1/4”13-1 6 GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,15; 3,54; 3,94; RR32 TK77 425 16,732 TKK77 255,00 10,039 25,40 1
PZ-82 82 92 3,23 3,62 50 1,969 3-1/2”10-1 6 GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,15; 3,54; 3,94; RR33 TK82 425 16,732 TKK82 255,00 10,039 25,40 1
PZ-86 86 96 3,39 3,78 50 1,969 3-3/4”7-12 GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,15; 3,54; 3,94; RR34 TK86 425 16,732 TKK86 255,00 10,039 25,40 1
PZ-90 90 102 3,54 4,02 50 1,969 4”8-12GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,15; 3,54; 3,94; RR34 TK90 485 19,094 TKK90 275,00 10,827 25,40 1
PZ-96 96 108 3,78 4,25 50 1,969 4”13-1 6 GA 40,60,70,80,90,100 1.57; 2,36; 2,76; 3,15; 3,54; 3,94; RR35 TK96 485 19,094 TKK96 275,00 10,827 25,40 1