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How to properly maintain and solve the fault of metering pump

Edit:Huaian Machinery Co., Ltd.UpDate:2018-08-02

First, how to replaceMetering pumpThe gap?

1. Remove the 4 screws that secure the pump head. Screw orientation on the back of the metering pump.

2. 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, adhere to its cohesion and stability, so that can spin down the gap.

3. 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.

4. Once the barrier is removed, check the safety barrier of the metering pump to ensure it is intact without any damage. Set a new barrier, rotate the backplane and the barrier clockwise until it snaps. Conditioning the backplane, so that the leakage discharge hole located at the bottom of the pump.

5. 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.

6. 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 working process.

7. When the hydraulic end is adjusted with the backplane orientation, the 4 bolts are tightened diagonally until it is appropriate to stop. The work should be completed with a uniform force.

Second, I received a spare parts package, in the removal of the old gap encountered trouble. Can you give some rated advice on how to remove the old barrier?

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 has not loosened, in the gap and the electromagnetic axis of the touch surface with some lubricating oil. After a few minutes, use a small plastic hammer to quietly hit the gap. Then proceed again in accordance with the above description.

Iii. when the self-priming method was chosen to measure hydrogen peroxide, cavitation occurred in the system. How to deal with this problem?

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

Four, metering pump device, after work does not measure liquid?

1. Is the secretion tube installed and the secretion valve closed? In the metering pump in the stage discharge valve demand opened. Note: Not all metering pumps have secretion valves.

2. 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. Metering pump bottom valve may be blocked, the measurement of liquid can not pass.

4. The stroke length setting of the metering pump is not suitable.

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

Five, is the use of flow monitoring measurement of a high viscosity medium, in the lead-in process received a flow fault indication signal, how to do to deal with this problem?

For reaction time, the pulse duration may not be sufficient. Relative to the specification of the pulse width of 80msec, the flow monitor pulse width expansion can be activated, adding 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.

Six, how to avoid the stroke positioning motor burned?

The motor of the metering pump is always working at the position of the conditioning stroke. If the metering pump motor does not work, stroke length conditioning lever to resist tightening 绷簧 tension, which will lead to premature stroke positioning motor damage.