Common problem analysis and solutions for the dosing system of metering pumps-Yuanlai Water Treatment

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Common problem analysis and solutions for the dosing system of metering pumps

Released Date: Dec 01,2018 Article Source: Yuanlai Water Treatment

During the long-term operation of the metering pump dosing system, some faults are inevitable. After a malfunction occurs, how to make correct judgments and analyses and confirm the cause of the malfunction is part of the daily work of equipment users and maintenance personnel. Here, the editor has collected and sorted out some common fault phenomena and possible causes related to metering pumps, which can be used for reference and learning by everyone!

Here, the editor has collected and sorted out some common fault phenomena and possible causes related to metering pumps, which can be used for reference and learning by everyone!

1.Often related to system configurationSee fault

1.1 Insufficient traffic

Cause of malfunction	Solution
The flow rate of the metering pump is relatively large, and the diameter of the inlet pipeline is too small, resulting in insufficient suction of the pump	1.Increase the diameter of the inlet pipeline to ensure that the pump is fully sucked in 2.Increase the inlet pressure to ensure that the pump is fully sucked in
There is a leakage in the inlet pipeline	Inlet pipeline
The inlet pipe of the metering pump is too long, resulting in insufficient suction of the pump	1.Increase the diameter of the inlet pipeline to ensure that the pump is fully sucked in 2.Change the installation position of the pump and shorten the length of the inlet pipeline 3.Add a riser near the inlet of the metering pump to improve the suction conditions
The metering pump is installed for lifting purposes, and there is no foot valve installed at the bottom of the inlet pipe	Add a foot valve at the bottom of the inlet pipe
There is internal leakage in the valve configured at the outlet of the metering pump, resulting in insufficient outlet flow	Repair or replace the valve

1.2 Excessive traffic / (Adjusting the stroke, the flow rate does not change significantly.)

Cause of malfunction	Solution
The outlet pressure of the metering pump is lower than the inlet pressure, resulting in siphoning	Install a back pressure valve in the outlet pipeline of the metering pump to ensure the pressure difference between the outlet and inlet of the metering pump

2 Common faults related to electrical control

2.1 The pump motor is not running

Cause of malfunction

Solution

Power supply issue

1.Confirm whether the power supply mode is correct.220/380VThe motor is a dual-voltage motor and is powered by three-phase power.

2.Is there a phase loss in the motor power supply? Confirm with a voltmeter.

3.Whether the overload protection is triggered. It needs to be reset or reconfigured.

4.Is there an internal open circuit in the power supply cable? Confirm with a multimeter.

5.Whether there is an open circuit inside the motor. Confirm with a multimeter.

6.Confirm whether the resistances of the three-phase windings of the motor are consistent.

2.2 The pump motor is not running

Keywords: Water Softening Equipment Automatic Water Softener Reverse Osmosis Equipment Manufacturer of Water Treatment Equipment

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