Special Tube Expanders

Linsen Expanders

KRAIS Tube Expanders

LINSEN – expanders can be power driven by electric drill, pneumatic drill. Designed to produce tube end connections without fittings. Enlarges tube end without distortions or buckling and leaving. 0,015” (0,38 mm) clearance that another tube with the same outside diameter can be inserted and soldered. It is excellent for U-tubes, short bends, for copper, brass aluminium and thin steel tubes. Available from 3/8” (9,5 mm) to 2” (50,8 mm). For more details contact factory.

Notching & Expanding

KRAIS Tube Expanders

NE notching&expanding type tube expander for thin tube sheet and thin wall tubes. Expand and notch the tube in one operation. The notches lock the tube in front and back side of the tube sheet and prevent to unseal during the transportation or expanding the near by and already expanded tubes. The expansion range is adjustable within 0,005 mm. Do not need the torque controlled drive.

Step By Step

KRAIS Tube Expanders

STEP-BY-STEP expander are an excellent tool for fast tube rolling in thick tube sheets, from 6” to 24”. The Expanders have grooves spaced at 1” (25,4 mm) increments along the cage of the tool, which allows the spring loaded thrust collar, to quickly and efficiently travel along the complete length of the tool. Significant time savings are achieved with this fast step rolling throughout the full width of the tube sheet.

PsePipe

KRAIS Tube Expanders

PSE expanders are designed to true up the ends of pipe and also to enlarge pipe inside diameters to a specific size in order to create the correct clearance between the pipe OD and ID prior to brazing or silver soldering. The Threaded mandrel allow.

5-Roll Expander

KRAIS Tube Expanders

5-Roll expander with nylon bush in front of the cage to prodect to the tubes from the scratches. Used for tytanium tubes.

Lubrication-Cooling Box

KRAIS Tube Expanders

Condenser tube expander with cooling-lubricating box. Made upon order only.

CBTE

KRAIS Tube Expanders

Non parallel self feeding boiler tube expanders from ½” to 4”. Suitable for new erection or repair work that have thin tube sheet or just touch up a leaky joints. Recommended for tube sheets from 1/8” to 5/8” (3 mm to 16 mm).

TWTC

KRAIS Tube Expanders

5-Roll expander with TWTC thin wall thrust collar.

Baffle Tube Expanders

KRAIS Tube Expanders

Baffle expanders for tubes from 5/8” to 2”.