Pressure Parts Engg. Co.

Rental Services


Bundle Pullers/Extractors



The Aerial tube bundle extractor is suitable for use on all Plate and Tube Heat Exchangers up to 2.75 mtr. Diameter and maximum bundle weight of 45 T at 12mtr length. The Aerial Tube Bundle extractor uses a special lifting frame, which is constructed in such a way that it has a maximum reach into the construction. The load is trimmed using an Aerial balancing Cylinder which makes it also easy to off load the bundles when the extractor is putdown on the ground. Due to the use of a pulley hook mechanism and 2 butt plates which are clamped against the extractors shell, the massive power of 45,000 kgs. Is compensated against the shell flange not against the structure.


Description


  • The unit is self-supportive due to the use of an air-cooled diesel engine. The engine drives the hydraulic pump and is equipped with a spark arrester. All hydraulic functions are remotely controlled for increased safety of the operator.
  • The extractor is fitted with a hydraulic which, which can pull/install the bundle in one stroke.
  • The hydraulic which is equipped with a vertical moving prism sheet which eases the operation considerably.
  • Because of the slim construction of the superstructure, accessibility to the exchanger and its surrounding obstacles are increased and furthermore there is no need to disassemble the superstructure while lifting the bundle out of the extractor.



Technical data of Bundle Extractor


Measurements (approx)
Weight of extractor – unloaded 12500 kg
Height of Operational position 3300 mm
Width of extractor 1400 mm
Length of extractor 9000 + 3000 mm
Max. Straight tubes length 12000 mm
Max. tube sheet diameter 2750 mm
Max. force applied with winch 45000 kgf



Torque Wrenches

Pneumatic Drive Hydraulic Pump

Pressure Range : 700 Bar / 10,000 Psi,
Flow Rate 13.1 LPM

Electric Operated Hydraulic Pump

Pressure Range : 700 Bar/10,000 Psi,
Flow Rate 13 LPM

Casset wrench


Square Drive

Torque Tools

Size of nut 22 – 200 MM
Torqueing value 430 – 70000 Nm

Socket

Deep socket : 40 to 100 MM
Impact socket : 22 to 145 MM

Accurate up to +- 3% with standard torque chart supply.



Hydro-jetting Machine

  • High pressure jet cleaning/hydro blasting of tubes/surfaces upto max 20000 psi.


    • Hydro-jetting is a process to clear blockages in pipe system and is mainly the first approach to clear blocked lines. According to the possibility of the blocked line, hydro-jetting will solve the problem and thereafter routine maintenance will make the line funtioning properly. Our hydro-jetter system have a heavy-duty power nozzle attched to high pressure. Operating at approximately 20000 psi, the hydro-jetting will destroy the most stubborn line blockages and efficiently scour the entire pipe.





Weekly Updated Mechanical Knowledge Blog



Heat Exchangers and Finned tubes

Finned pipe and tubes are used within shell and tube type heat exchangers to enhance the heat transfer between the inside of the heat exchanger tube or pipe, and the outside. Finned pipes and tubes are commercially available in various sizes and materials. Custom finned tubes and pipes are also available.

Finned Pipe / Tube Design Considerations:

To be able to transfer heat well, the finned tube or pipe material must have adequate thermal conductivity . Heat energy transfer is increased by the effective fin area on the tube or pipe. The heat exchanger tube material will thermally expand differently at various temperatures, therefore, thermal stresses will be present along the heat exchanger. Additionally, stress will be induced by any high pressures from the applicable fluids. The tube and fin material should be galvanically compatible with all heat exchanger components and fluids for extended service periods under all operating conditions (temperatures, pressures, pH , etc.) . These requirements require careful selection of material which is : strong, thermally-conductive, and corrosion-resistant .

The fin effectiveness in transferring a given quantity of heat is defined by:

Fin efficiency = (Actual Heat Transferred) / (Heat which would be transferred in entire fin area were at base temperature)

Conditions when fins do not help:

Finned tubes / pipes in selected installation will not help thermal transfer. If the convection coeffiecint is large, as it will be with high velocity fluids or boiling liquids, the fins may produce a reduction in heat transfer. This due to the fact that the conduction resistance then represents a larger impediment to the heat flow than the convection resistance.