Installation Of Centrifugal Pump

Installation Of Centrifugal Pump

The following preparations have to be made prior to placing the centrifugal pump on the foundation:

• Mark axes and levels on the foundation.

• Check the finish of the foundation before beginning erection work.

The foundations are to be laid according to the following:

• Lift centrifugal pump onto the foundation and place on the support rails. Height of support rails: 50-100mm Raise the pump according to Align axes and height of the pump according to the plant requirements.

• Transfer the fastening points from the base frame to the foundation. Drill block holes and insert dowels.

• Insert the threaded rod from above and screw on 2 washers and 2 hexagon nuts between the foundation and the base frame. Screw threaded rod into the dowel and tighten with the fastening nut. 

• Raise pump unit with the setting nuts and remove the support rails.

• Set the pump unit with setting nuts and tighten on the base frame with the fastening nuts. 

• Cut off and debar the threaded rod with 5 mm allowance.

• Grout base frame in firmly up to the top edge of the special section tube with non-shrinking cast concrete and leave to set (Approx. 2 days). At least concrete strength category according to EN206-1. C16/20

Mounting the motor:

• Draw the drilling coupling half flush onto the motor stub and secure on the feather key with a set screw.

• Mount motor on motor base frame (893).

• If there are no fastening threads in the motor base frame, transfer the bore holes from the motor and drill the threads accordingly. The axle height of the motor is established by the spacers

Pipework:

• When planning the pipework, a supplement must be included for heat expansion.

• Pipes should always be mounted stress-free. During erection work ensure that the pipes are supported in such a way that no forces, vibrations or weight can be transferred to the pump.

• The suction and delivery pipes should be supported in such a way that the weight of the pipe is not transferred to the centrifugal pump.

Aligning the coupling

• Data on the coupling used (tolerances, application limits, aligning information, etc.) can be found in the manufacturer's operating instructions.

The following must be observed at the suction pipe:

• The suction pipe should be kept as short as possible to maintain pipe friction losses at a minimum.

• Run a pressure test to check the pipe for leaks.

• The suction pipe should rise or fall slightly towards the centrifugal pump, 

• If a reducing piece is installed directly upstream of the centrifugal pump, the narrowing section thereof should always be at the bottom. 

• Inlet points in the suction pipe should be located at a distance from the centrifugal pump suction flange that is equivalent to a minimum of 5 times the diameter of the suction pipe.

• For safety reasons the pump must be prevented from starting up while it is opened. (lockable maintenance switch or main switch).