Huaian Machinery Co., Ltd.



Analysis of common faults of metering pump

Edit:Huaian Machinery Co., Ltd.UpDate:2018-08-03

1) Metering pump fluid is not normal

Rotate to stroke length 100% azimuth. This allows the entire assembly to be rotated to the back of the leak drain hole and the bottom of the pump alignment. Adjust the hydraulic end and the barrier to the proper orientation during the pump operation.

The duration of the pulse may not be long enough for the moment of reaction. Relative to the specification of the pulse width of 80msec, the flow monitor pulse width expansion can be activated to increase the pulse width to 300msec. Activate the smart switch, remove the cover from the fixed circuit board and remove the jumper X-1. This activates the extension function and promises more time before the fault is indicated.

metering pump device self-venting pump head, the use of self-priming suction fluid. Keep the suction line as short as possible.

2) removable metering pump gap

When the old barriers are removed, there is often trouble. Now how to remove the old barrier to provide some rated propositions.

1. After the pump head is loose, adjust the stroke length to 0% azimuth before removing the pump head. Can ensure that the electromagnetic shaft to meet the pressure to maintain its cohesion and stability, so that the gap can be screwed.

2. Detach the screw from the jack in the pull-out fluid end. Catch the liquid end counterclockwise. A little bit of resistance, can spin down the gap.

3. The stoichiometric chemicals may be crystallized at the hydraulic end, causing the check valve ball and valve seat to not work properly.

4. There may be gas leaks at the suction end of the metering pump. The suction side connecting parts of the liquid end may be short of O-ring or suction valve to connect loose.

3) A high viscosity medium is measured by flow monitoring, and the flow fault indication signal is received during the lead-in process, how can I handle this problem?

Move the hydraulic end by loosening the 4 pump head screws. Rotate the stroke length to 0% and catch the liquid end, then slide out from the screw hole, then the screws don't touch them, but they also manipulate the backplane and the barrier. Then rotate the part counterclockwise, with a little resistance, and the barrier will loosen from the electromagnetic axis. If the barrier is not loosened, use some lubricating oil on the touch surface of the barrier and the electromagnetic shaft. After a few minutes, use a small plastic hammer to quietly hit the gap. Then proceed again in accordance with the above description.High-pressure three-plunger pumpManufacturers

4) How to avoid metering pump stroke positioning motor burned?

1. Remove the 4 screws that secure the pump head. The screw is in the opposite direction of the metering pump.

2. See if the secretion tube is installed and the secretion valve is closed? In the metering pump lead stage secretion valve demand opened. Note: Not all metering pumps have secretion valves.

3. After the end of the barrier device, and the back plate leakage discharge hole is placed in a straight position, the pump head is installed. Ensure that the suction valve is aligned with the leak discharge hole, and the screw at the hydraulic end is aligned with the corresponding 4 holes.

5) Hydraulic metering pump flow is small or inaccurate?

1. Unscrew the vent valve in the three valves.

2. Replenish the oil by filling the valve.