Foundation Of The Canned Vertical Turbine Pump (double casing vertical barrel centrifugal pump)
The foundation shall be located on a place that allows a minimum of pipe work and that is easily
accessible for inspection during operation. According to the environment the foundation may consist of concrete or of steel. It must be rigid and heavy enough to absorb normal vibrations and shocks. The flange of the Can must be supported on the whole surface. It should be at least 20 – 30 mm (0.8 – 1.2 in) higher than the surrounding to avoid the deposit of dust and humidity.
Vertical alignment
Vertical alignment is done with leveling screws.
Use a spirit level for correct horizontal alignment of the baseplate.
The max. vertical misalignment is 0.5 mm/m pump length.
Steel foundation
When the double casing Canned vertical barrel centrifugal pump unit is mounted directly on structural steel frame, it shall be well supported by constructural beams. It is recommended to check the natural frequency of the steel frame, because it shall not coincide with the pump speed. The flange of the Can has to be fixed on a flat surface with studs or hex screws, the exact horizontal alignment is very important!
Concrete foundation
A concrete foundation must have an exact horizontal alignment and must be placed on solid ground. First a basic foundation shall be built with square shaped holes for embedding the foundation bolts. After putting the Can in the foundation the proper alignment can be obtained by adjusting it with shims under the flange. Now insert the foundation bolts and grout the space between the basic foundation and the Can with grouting cement .(refer to illustration)
It is very helpful to use a properly made and stable wooden frame around the Can. So the grouting cement will not flow a side. When the grouting is totally set and hardened the foundation bolts shall be tightened in a firm and symmetrical way.
Final assembly for not complete assembled Canned Vertical Turbine Pumps (double casing vertical barrel centrifugal pumps)
Canned Vertical Turbine Pumps (double casing vertical barrel centrifugal pumps) exceeding a total length of approximately 6 m (19.7 ft) are delivered in various components and must be assembled on site. The main parts are:
hydraulic bowls section - various line shafts and column pipes - headstock and thrust bearing.
To install the Canned Vertical Turbine Pump (double casing vertical barrel centrifugal pump) in the Can, clamps for the column pipes are delivered with the Canned Vertical Turbine Pump (double casing vertical barrel centrifugal pump).
1) Mount the first rising main column pipe [1350.3] and line shaft to the already assembled hydraulic section.
2) Mount a clamp to the column pipe. The clamp has lifting lugs, which allow to use a crane for
lowering this assembly into the pit (see picture).
3) Connect the next line shaft (refer to section 6, Maintenance) and put on the next rising main
column pipes [1350.2] (see picture) by using a second clamp.
4) Now the assembly consists of the hydraulic section and two column sections. This assembly is taken by a crane using the second clamp.
5) Take off the first clamp and lowering down the assembly until the clamp is supported by the
wooden frame (see picture).
Repeat step 1 to 5 until the Canned Vertical Turbine Pump (double casing vertical barrel centrifugal pump) is completely assembled.
Correct sequence of column pipe:
Refer to the corresponding assembling drawing where the different lengths of column pipes and the position of the various column pipes are indicated.
The rising main column pipe (above the bowls assembly) [1350.3] has a special flange dimension
on the lower end for fitting on the bowls assembly. All following rising main column pipes [1350.2] are of equal design on top and lower end so that these pipes can be used either way. The last one or rising main column pipe [1350.1] are of different length to reach the required total Canned Vertical Turbine Pump (double casing vertical barrel centrifugal pump) setting. The same special attention must be given to the various intermediate shafts [2120.1] which are all equal
between bowl section and rising main column pipe length [1350.2]. Like the rising main column pipes [1350.1] also the intermediate shafts [2120.2] are different from the intermediate shafts [2120.1].
With the rising main column pipe [1350.1] the top shaft [2130.1] is assembled. Now you can put on the headstock [1141] and hexagon head bolt [6577.4] it to the top column pipe.
