정량 펌프 다이어프램

About Metering Pump Diaphragm

Metering pump diaphragm (also called diaphragms, seals, sealing rings, oil seals) are a popular piece of equipment in professional fields. Their ability to accurately measure and deliver efficiently makes them the first choice in many industrial applications. In many industrial fields, such as chemical, pharmaceutical, petroleum and food processing, precise metering and efficient conveying are key elements to ensure stable production processes and product quality.

소개

1. Accurate measurement capability
Metering pump diaphragms are renowned for their ability to accurately meter, which is critical to production processes in many areas. It uses advanced diaphragm technology to control the flow of liquid through expansion and contraction movements. This design ensures flow accuracy and stability, allowing users to precisely measure the required amount of liquid. Whether small or large flows are required, metering pump diaphragms can meet the requirements of different applications.

2. Efficient transportation capacity
In addition to accurate metering, efficient liquid transport is also a major advantage of metering pump diaphragms. Its fast diaphragm movement and adjustable pump speed enable it to complete large amounts of liquid transportation tasks in a short time. This is crucial for production lines that require high output and efficiency. The efficient delivery capability of the metering pump diaphragm can help users improve production efficiency, reduce production costs, and ensure the continuity and stability of the production process.

3. Applicable to a variety of liquids and processes
The design of the metering pump diaphragm makes it suitable for handling liquids of various viscosities, from low-viscosity solutions to high-viscosity colloids. It can also handle a wide range of corrosive liquids and particulate matter, making it suitable for a variety of processes and applications. Whether it is the transportation of chemicals in chemical plants or the formulation of drugs in pharmaceutical plants, it is capable of doing the job.

Analysis of damage causes

The metering pump diaphragm is made of high-quality materials and processes, and has good elasticity and strength. However, during use, the diaphragm may still rupture, mainly for the following reasons:

1. Excessive use: If the metering pump runs continuously for a long time or exceeds the rated flow and pressure, the diaphragm will be subjected to excessive variable stress and frequency, which will accelerate the aging and wear of the diaphragm.

2. Improper operation: If the feeding of the metering pump is unstable, the pressure is low, or the slurry in the pump separates to form a gap during feeding, resulting in a shortage of material, the diaphragm will be impacted and stretched, and it is easy to rupture or breakdown.

3. Temperature is too high: If the feed temperature exceeds the specified range (generally not exceeding 100°C), the diaphragm will be heated to deform or soften, reducing its elasticity and strength.

4. Medium corrosion: If the transported medium contains corrosive substances such as strong acid, strong alkali or other organic solvents, it will corrode the surface or internal structure of the diaphragm, causing it to become thin or crack.

5. Mechanical failure: If the control rod, valve, piston and other components of the metering pump suffer from wear, eccentricity, sinking and other failures, the diaphragm will be stressed unevenly or increased, causing cracks or holes.

Solutions

After the metering pump diaphragm ruptures, the operation should be stopped immediately and the following steps should be followed:

1. Disconnect the power supply, close the inlet and outlet valves, and discharge the remaining liquid in the pump.

2. Remove the four screws fixing the pump head and remove the pump head.

3. Adjust the stroke length to the 0% position so that the electromagnetic shaft has enough pressure to keep its connection stable, then pull the fluid end outward to disengage the screw from the socket, and unscrew the diaphragm counterclockwise.

4. Check the safety diaphragm of the metering pump to ensure that it is intact and without any damage. If the safety diaphragm is also broken, it needs to be replaced with a new safety diaphragm.

5. Install the new diaphragm and rotate the back plate and diaphragm clockwise until they are tight. Adjust the backing plate so that the leakage drain hole is at the bottom of the pump.

6. After the diaphragm is installed and the leakage discharge hole of the back plate is placed in a vertical position, install the pump head. Make sure the suction valve is aligned with the leakage discharge hole, and the screws on the liquid end are aligned with the corresponding four holes.

7. Rotate to the stroke length position. This allows the entire assembly to be rotated so that the leak drain hole in the back plate is aligned with the bottom end of the pump. Adjust the liquid end and diaphragm to the proper position while the pump is running.

8. After the positions of the fluid end and the backing plate are adjusted, tighten the four bolts diagonally until they are suitable. Use even pressure when completing this job.

9. Reconnect the power supply, open the inlet and outlet valves, adjust the flow and pressure, and check whether the metering pump is working properly.