Multi-level submerged pump installation and use of the note

by：J&T 2021-02-04

multi-level submerged pump installation drawing, multi-level submerged pump use the matters needing attention, multi-level submerged pump installation note

a, multi-level submerged pump installation note

1, before installation should be according to the multi-level submerged pump installation drawing confirmation what type do you belong to specification corresponds to a lot of depth under submerged pump in liquid level, at the bottom of the pump body distance at the bottom of the tank or water tank.

2, multi-level submerged pump due to the structure and principles of multistage pump, vertical placed, should be used as far as possible don't lie, horizontal if lay submerged depth is too long to put to should take put down gently, to avoid external force because its axis deformation.

3, due to the series of multistage liquid pump is prohibited flow of liquid particles of impurities, so to prevent the pump body as impurity enter the phenomenon of congestion stuck a strainer should be installed in the water system before installation, the cross section area of the filter should be greater than the pipe sectional area 2 times to meet machine cooling pump flow.

4, multi-level submerged pump installation disk should be fixed on the bracket in the container, need to be bolted and firm, before installation should take into account the containers and stents are able to withstand the weight of the multi-level submerged pump.

5。 Before turning on the power supply should be used to inspect the site of the power supply voltage and frequency is and motor nameplate on the related data of unification, view of multistage liquid pump capacity and head are in accordance with the field the required parameters.

multi-level submerged pump physical figure

the multi-level submerged pump installation drawing for the various series of multistage liquid pump inside the corresponding distance at the bottom of the tank at the bottom of the pump body, and a variety of models of minimum depth of the liquid level.

multi-level submerged pump installation drawing

2, multi-level submerged pump use note

1, the preparation before starting multi-level submerged pump

( 1) Should put the pump before starting multi-level submerged pump and using the sink impurities should be cleaned up;

( 2) Check the multi-level submerged pump motor winding insulation resistance of the surface-to-surface, must be greater than zero. 5 mΩ;

( 3) Check whether fixed bolt of multi-level submerged pump flange bolt looseness and export have tightened; （ 4) Should also be unloaded before starting motor coupling between pump body and cover, with the hand disc coupling clamp block have tightened, and the flexible shaft disk move should feel special, cannot appear friction phenomenon; No exception should be coupling shield installed can through to the power of the multi-level submerged pump commissioning.

2, start running multi-level submerged pump note

( 1) Before starting should guarantee the outlet valve closed, after the electricity should check motor direction of rotation is clockwise, checking method is 2 seconds, the power supply is connected to check the pump shaft, looking down on traffic from the motor end, confirmed to logo direction arrow should be according to the water pump motor, if the steering is wrong, should be replaced with two root power wiring.

( 2) Starting multi-level submerged pump, slowly open the outlet valve, make the multi-level submerged pump use, within the prescribed performance parameters of the outlet valve opening size can regulate the flow of multi-level submerged pump directly to make its current is controlled in the range of effective use. If exports can not be closed valve must be in continuous operation under the condition of full open, can install bypass in the export pipeline as a loop, discharge excess flow, which can avoid motor overload.

( 4) In the process of multi-level submerged pump operation should always check the fixed bolt have loose phenomenon, the export of multistage fluid pressure gauge numerical volatility and the vibration of the pump;

( 5) Should also pay attention to the multi-level submerged pump in use process have any abnormal noise, if found not normal, it is necessary to stop the machine immediately to check, to do some troubleshooting steps in time;

( 6) If in use after a period of time, found that there was an obvious decline phenomenon of pump flow and pressure, this kind of circumstance should be apart the pump inspection, replace worn parts, such as floating seal, impeller and bearing parts, etc. Multi-level submerged pump outage notice

( 1) Multi-level submerged pump downtime before should slow close pump discharge valve and as well as the related instrument;

( 2) And then cut off power supply;

( 3) If multi-level submerged pump need to stop using for a long time, used the multi-level submerged pump should be open to wipe the inside of the pump body scale, coated with antirust oil, to pack good, properly kept. Multi-level submerged water pump use the matters needing attention in the

( 1) Prohibited inside the pump no liquid space-time turned to run, such not only can damage the bearing and will damage the mechanical seal, because these two parts need liquid for the use of cooling and lubrication.

( 2) When conveying medium temperature reaches 90 ℃, due to the proportion of hot water than cold water was reduced by 3. About 5%, therefore, under the same head, reflected in the pressure gauge reading, will be lower than the actual pressure value 3. About 5%.