Diaphragm metering pumps are applied in many industries. As users, they hope to purchase better quality diaphragm metering pumps, because quality problems will be relatively small in the process of operation. So, the user in the selection of good diaphragm metering pump when the need to pay attention to what? The following Huaian medicine metering pump manufacturer Department of Yu machinery to make a summary.

1. Choose according to demand

Now there are many distributors of diaphragm metering pump on the market, different production and management brands, various types of diaphragm metering pump to meet the diversified needs of the users. The demand of the diaphragm metering pump is different because of the different industry. The user wants to choose a good diaphragm metering pump. First, we need to decide what kind of demand we need. After determining the demand, we choose according to the demand to choose the diaphragm metering pump suitable for ourselves.

2. Choose good quality

Diaphragm metering pump because of different manufacturers, the quality is not the same, the uneven quality also caused the price difference. So when users buy the diaphragm metering pump, the price is not the only factor to consider, but more attention should be paid to the quality of the product. A good diaphragm metering pump manufacturer is committed to providing high quality diaphragm metering pumps for users. And when the user is choosing the diaphragm metering pump, the quality of the product should be considered as the first factor, which is conducive to the development of the next work.

3, choose good word of mouth

A product is good, only the users who have used the most have the right to speak. So when choosing the diaphragm metering pump, it is more reliable to use the residence tablet as a reference, which is more reliable than advertising, because this is the real feeling after users are using the product.

The causes of damage to the sealing parts of the metering pump are usually the following:

The processing quality of the sealing surface is not good, which mainly indicates that there are cracks, holes and ballast on the sealing surface. Because of the improper selection of welding and heat treatment specification and welding and heat treatment process control caused by bad sealing surface of the hard transition is too high or too low, because the wrong material or heat treatment caused by improper sealing surface hardness uneven, erosion resistance, mainly because of the welding process in metal bottom blown to above to dilute the seal the composition of the alloy surface caused by the.

During the process of opening and closing, the seals of diaphragm metering pump will be damaged by abrasions, bruises and extrusion. Under the action of high temperature and high pressure, there will be interpenetrating and exudation of atoms and adhesion. When the two covers move to each other, the adhesion is easily tearing. The more thick the surface of the diaphragm is, the higher it is, the more easily it happens.

When the medium is active, the cover of the diaphragm metering pump is worn, flushed and cavitation. In the medium, the floating fine particles contradict the secret cover and cause partial damage. The high-speed moving medium directly washes the sealing surface, causing local damage. When the mixture is mixed and partial vaporizes, the angry gas bubbles blow the surface of the sealing surface, causing partial damage. The erosion of the medium and the alternation of chemical erosion will strongly corrode the sealing surface.

The contact between the sealing surface, the contact between the sealing surface and the closed body and valve body, the concentration difference of the medium and the oxygen concentration difference will cause potential difference, resulting in electrochemical erosion. The sealing surface of the anode side will be eroded. However, when the medium near the sealing surface does not produce current, the medium acts directly with the sealing surface to form chemical erosion. Erode the seal face.