Pump installation and precautions

Pump installation and precautions:

1. According to the basic size, do the concrete foundation and embed the anchor bolts.

2. The pump and motor should be inspected prior to installation. Each part should be intact and there should be no debris in the pump.

3. Place the unit on the foundation, place pairs of wedge pads between the base plate and the foundation, and adjust the wedge pad to align the level of the pump. After adjusting, tighten the anchor bolts.

4. The pump suction and discharge piping should have brackets and cannot be supported by pumps. The inlet and outlet pipeline caliber should be unified with the inlet and outlet of the pump.

5. When the FZB series self-priming pump is installed, the inlet pipe should be connected first, then the liquid should be filled and then the outlet pipe should be adjusted to correct the steering. The inlet pipe of the pump must be matched with the pump, and the total length cannot exceed 5 meters. Otherwise, the self-priming performance will be affected. The self-priming height can be calculated simply by the formula on the right: self-priming in clean water 3m/media density = actual self-priming height.

6. After the installation is completed, finally turn the coupling by hand to check whether there is any rubbing phenomenon. If the rotation is easy, the installation is completed.

7. The magnetic pump is strictly forbidden to extract the medium with particles and easy to crystallize. It is not allowed to perform continuous operation when the discharge port is closed, and it is required to maintain the minimum flow rate.

8. In order to prevent debris from entering the pump, a filter should be provided at the inlet. The filter area should be 3 to 4 times the cross-sectional area of ​​the pipeline.

9. Pumps with high heads should also be equipped with check valves on the outlet line to prevent water hammer damage caused by sudden shutdown.

10. It must be ensured that the installation height of the pump is in line with the NPSH of the pump, taking into account the loss of the line and the temperature of the medium. To avoid generating NPSH in the pump body, the following formula must be satisfied:

NPSHa≥NPSHr+0.5 NPSHa: available NPSH (m)NPSHr: required NPSH (m)

NPSHa=106(Pa-Pv)/ρg±hs-hf

Pa: pressure acting on the surface of the transport medium (MPa) Pv: vapor pressure of the medium (MPa) ρ: medium density (kg/m3) hs: suction height (m) hf: suction pipe resistance (m)

g: Gravitational acceleration (m/s)

11. When the temperature of the medium is too high, cooling measures should be taken for the machine seal to prevent cracking of the mechanical seal deformation static ring.

12. If the viscosity of the medium is too high, the performance and power of the pump will change. Please contact us for details.

Startup and operation of the pump:

1. Before driving, the pump should be filled with the liquid to be delivered (if the pump is on suction), the outlet gate valve closed, and the power supply connected.

2. Turn on the power and check that the pump is turning correctly.

3. The unit is commissioned for 5 to 10 minutes and can be put into operation if there are no abnormalities.

4. When shutting down, the outlet valve should be closed first, and then cut off the power.

Pump repairs and maintenance:

1. Check the pump and motor regularly and replace the fragile parts.

2. When the pump is not used for a long period of time, the flow path in the pump should be cleaned and the power must be cut off.

3. Do not run air.

The transport medium is not corrosive. What pump should be selected?

Q: The medium we need to transport is 5% dilute sulfuric acid, the temperature is about 20 degrees, and its corrosion is not strong. What pump should we choose?

Answer: The stainless steel (304) pump is optional. The range of the medium that the stainless steel pump can deliver is as follows:

If the media you are transporting is available in the table above, you will find several stainless steel pumps, CQ type stainless steel magnetic pumps, and IH type stainless steel chemical centrifugal pumps. If the media you have sent is not available in the above table Here is a list of materials that are more resistant to corrosion:

1. Engineering plastic (reinforced polypropylene)

2, ultra-high molecular weight polyethylene 3, fluorine plastic (polytetrafluoroethylene, polyfluorinated ethylene propylene)