How to replace the diaphragm of the metering pump 1. Remove the four screws holding the pump head. The screw is located on the back of the metering pump.
2. After the pump head is loosened, adjust the stroke length to 0% before removing the pump head. It can ensure that the electromagnetic shaft has sufficient pressure to keep it firmly connected, so that the diaphragm can be unscrewed.
3. Pull the hydraulic end outward to disengage the screw from the socket. Hold the liquid end counterclockwise. Slight resistance, you can unscrew the diaphragm.
4. Once the diaphragm is removed, check the safety diaphragm of the metering pump to ensure it is intact and without any damage. Install the new diaphragm and turn the back plate and diaphragm clockwise until tight. Adjust the back plate so that the drain hole is at the bottom of the pump.
5. Install the pump head after the diaphragm is installed and the back-plate leak drain hole is in a vertical position. Make sure that the suction valve is aligned with the leak drain hole and that the hydraulic end screw is aligned with the corresponding 4 holes.
6. Rotate to 100% of stroke length. This will allow the entire assembly to rotate until the back plate leaks out and aligns with the bottom of the pump. Adjust the hydraulic end and diaphragm to the proper position while the pump is running.
7. When the hydraulic end is adjusted with the position of the back plate, tighten the four bolts diagonally until it is suitable. Apply the force evenly when you finish this task.
Second, how to remove the old diaphragm by loosening the 4 pump head screws, move the hydraulic end. Rotate the stroke length to 0% and grasp the hydraulic end, then slide out of the screw hole, then the screws do not touch them but they also hold the back plate and diaphragm. Then turn this part counterclockwise, with some resistance, and the diaphragm will loosen from the electromagnetic shaft. If the diaphragm has not loosened, apply some lubricant to the contact surfaces of the diaphragm and the electromagnetic shaft. After standing for a few minutes, gently hit the diaphragm with a plastic hammer. Then proceed again as described above.
Third, when self-priming is used to measure hydrogen peroxide, cavitation occurs in the system. how to solve this problem?
The metering pump is installed from the exhaust pump head and is self-priming. Keep the suction line as short as possible.
Fourth, metering pump installation, operation, do not measure the liquid?
1. Is a drain tube installed and the drain valve closed? The drain valve needs to open during the priming phase of the metering pump. Note: Not all metering pumps have drain valves.
2. There may be a gas leak at the suction side of the metering pump. Fluid end suction side connections may lack o-rings or loose suction valve connections.
3. The bottom valve of the metering pump may be clogged and the metered liquid may not pass.
4. The stroke length of the metering pump is not set properly.
5. The metered chemicals may crystallize at the hydraulic end, causing the check valve ball and seat to not work properly.
5. When a high-viscosity medium is being measured using flow monitoring, a flow failure indication signal is received during the priming process. How can this problem be solved?
The pulse duration may not be long enough for reaction time. With respect to the standard pulse width of 80 msec, the flow monitor pulse width extension can be activated, increasing the pulse width to 300 msec. Activate the intelligent transfer switch, remove the cover of the fixed circuit board, and remove the jumper X-1. This activates the extended function, allowing more time before the fault indication.
Six, how to prevent the stroke positioning motor burned?
When adjusting the stroke position, make sure the metering pump motor is always running. If the metering pump motor is not running, the stroke length adjustment lever will resist the tension of the compression spring, which will result in premature failure of the stroke positioning motor.
2. After the pump head is loosened, adjust the stroke length to 0% before removing the pump head. It can ensure that the electromagnetic shaft has sufficient pressure to keep it firmly connected, so that the diaphragm can be unscrewed.
3. Pull the hydraulic end outward to disengage the screw from the socket. Hold the liquid end counterclockwise. Slight resistance, you can unscrew the diaphragm.
4. Once the diaphragm is removed, check the safety diaphragm of the metering pump to ensure it is intact and without any damage. Install the new diaphragm and turn the back plate and diaphragm clockwise until tight. Adjust the back plate so that the drain hole is at the bottom of the pump.
5. Install the pump head after the diaphragm is installed and the back-plate leak drain hole is in a vertical position. Make sure that the suction valve is aligned with the leak drain hole and that the hydraulic end screw is aligned with the corresponding 4 holes.
6. Rotate to 100% of stroke length. This will allow the entire assembly to rotate until the back plate leaks out and aligns with the bottom of the pump. Adjust the hydraulic end and diaphragm to the proper position while the pump is running.
7. When the hydraulic end is adjusted with the position of the back plate, tighten the four bolts diagonally until it is suitable. Apply the force evenly when you finish this task.
Second, how to remove the old diaphragm by loosening the 4 pump head screws, move the hydraulic end. Rotate the stroke length to 0% and grasp the hydraulic end, then slide out of the screw hole, then the screws do not touch them but they also hold the back plate and diaphragm. Then turn this part counterclockwise, with some resistance, and the diaphragm will loosen from the electromagnetic shaft. If the diaphragm has not loosened, apply some lubricant to the contact surfaces of the diaphragm and the electromagnetic shaft. After standing for a few minutes, gently hit the diaphragm with a plastic hammer. Then proceed again as described above.
Third, when self-priming is used to measure hydrogen peroxide, cavitation occurs in the system. how to solve this problem?
The metering pump is installed from the exhaust pump head and is self-priming. Keep the suction line as short as possible.
Fourth, metering pump installation, operation, do not measure the liquid?
1. Is a drain tube installed and the drain valve closed? The drain valve needs to open during the priming phase of the metering pump. Note: Not all metering pumps have drain valves.
2. There may be a gas leak at the suction side of the metering pump. Fluid end suction side connections may lack o-rings or loose suction valve connections.
3. The bottom valve of the metering pump may be clogged and the metered liquid may not pass.
4. The stroke length of the metering pump is not set properly.
5. The metered chemicals may crystallize at the hydraulic end, causing the check valve ball and seat to not work properly.
5. When a high-viscosity medium is being measured using flow monitoring, a flow failure indication signal is received during the priming process. How can this problem be solved?
The pulse duration may not be long enough for reaction time. With respect to the standard pulse width of 80 msec, the flow monitor pulse width extension can be activated, increasing the pulse width to 300 msec. Activate the intelligent transfer switch, remove the cover of the fixed circuit board, and remove the jumper X-1. This activates the extended function, allowing more time before the fault indication.
Six, how to prevent the stroke positioning motor burned?
When adjusting the stroke position, make sure the metering pump motor is always running. If the metering pump motor is not running, the stroke length adjustment lever will resist the tension of the compression spring, which will result in premature failure of the stroke positioning motor.
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