In the process of installation of metering pump in the need to pay attention to many matters, otherwise there will be errors, then there will be lots of unpredictable failures, so what are the metering pump installation considerations and common fault, let's talk.

Installation items

1. export is higher than import, avoid siphon phenomenon

2. the pump head and the injection valve require vertical installation

3. the fittings can be screwed by hand, please don't use tools; the thread doesn't use the raw material belt

4. the power supply voltage is stable and grounded

5. the installation environment is clean, spacious and well ventilated

Common faults

1) abnormal imbibition of metering pump

Rotate to the 100% position of stroke length. This allows the entire unit to rotate to the back of the backplane drain hole and the bottom of the pump alignment. Adjust the hydraulic end and diaphragm to the proper position during the operation of the pump.

The pulse duration may not be long enough for the reaction time. Compared with the standard pulse width 80msec, the width of the flow monitor pulse width can be activated, and the pulse width is increased to 300msec. Activate the smart switch, remove the cover fixed circuit board, remove the jumper X-1. This activates the extended function and allows more time before the fault instruction.

The metering pump is installed from the exhaust pump head, using self suction liquid absorption. Keep the suction line as short as possible.

2) change the diaphragm of metering pump

Troubles often occur when dismantling old diaphragms. Provide some additional advice on how to remove the old diaphragm.

After in the pump head loose, remove the pump head before the stroke length adjustment to the 10% position. To ensure that the electromagnetic axis has enough pressure to maintain the stability of the connection, so that you can spin the diaphragm.

The pull end torque from the Jack out of the screw. Hold the liquid end counterclockwise. A little bit of resistance, you can spin the diaphragm.

Chemical 3 measurement may end in fluid crystallization, resulting in a one-way valve ball and seat valve does not work.

In the end inhalation metering pump may have a gas leak. Hydraulic side suction side connector may lack O ring or suction valve connection loose.

3) flow monitoring and measuring a high viscosity medium, received the flow fault indication signal in the process of liquid delivery, how to do this problem can be solved?

Move the hydraulic end by loosening the 4 pump head screws. The length of the rotating stroke is 10%, and the hydraulic end is caught and then slid out of the screw hole, then the screw does not contact them, but it also controls the back plate and diaphragm. Then rotate the component counterclockwise, a little bit resistance, the diaphragm will be loose from the electromagnetic axis. If the diaphragm is not loose, use some lubricant on the contact surface between the diaphragm and the electromagnetic shaft. After a few minutes, gently tap the diaphragm with a plastic hammer. And then proceed again in accordance with the above description.

4) how to prevent the metering pump stroke positioning motor burnout?

4 screws fixed the pump head removed. The screw position is on the back of the metering pump.

See if the installation of the drainage pipe and drain valve closed? The discharge valve needs to be opened at the metering pump suction stage. Caution: not all metering pumps have drain valves.

After in the diaphragm installed and back leakage from the hole in the vertical position, the installation of pump head. Make sure that the suction valve is aligned with the drain hole, and the screw at the hydraulic end is aligned with the corresponding 4 holes.

5) the flow of hydraulic metering pump becomes smaller or inaccurate?

The valve in the valve open three.

Through the fill oil valve fully fill oil.