What are the reasons why diaphragm metering pumps fail to deliver pressure?

　　Diaphragm metering pump is a kind of precision fluid transfer equipment widely used in chemical, petroleum, pharmaceutical and other fields. However, in the process of use, sometimes encounter diaphragm metering pumps can not hit the pressure of the problem, which affects the normal operation of the equipment, but also may pose a threat to production safety. The following in-depth analysis from a professional point of view of the diaphragm metering pump can not play the reason for pressure.

　　First, the diaphragm is damaged or aging

　　Diaphragm is the core component of the diaphragm metering pump, used to convert the rotary motion of the motor into the reciprocating motion of the liquid. When the diaphragm is damaged or aging, its elasticity is reduced, can not effectively transfer pressure, resulting in the pump can not play the pressure. This usually occurs in the diaphragm material selection is not appropriate, the use of time is too long or poor working environment and so on.

　　Second, the pump import and export check valve sealing bad

　　Diaphragm metering pump import and export check valve is used to control the direction of liquid flow. When the check valve seal is bad, the liquid in the pump cavity to form reflux, can not form an effective pressure. This situation may be caused by check valve wear, spring failure or improper installation.

　　Third, insufficient or contaminated hydraulic oil

　　Diaphragm metering pumps usually use hydraulic oil as a power source. When the hydraulic oil is insufficient or contaminated, the pump operates less efficiently and is unable to generate sufficient pressure. Insufficient hydraulic oil may be due to leakage, not added in time or the system design is not reasonable and other reasons; and hydraulic oil contamination may be due to use for too long, poor working environment or poor oil quality and other reasons.

　　Fourth, the pump body internal wear

　　Internal wear of the pump body, including the main shaft, eccentric wheel, tappet and other parts of the wear. When these parts are seriously worn, it will lead to the pump body internal clearance increases, the liquid leakage increases, thus reducing the working pressure of the pump. This usually occurs when the equipment is used for too long, improper maintenance or poor working environment.

　　Fifth, other factors

　　In addition to the above four main reasons, there are some other factors may lead to diaphragm metering pumps can not play the pressure. For example, the pump stroke regulator is damaged, the outlet line is blocked, the pump import and export across the line hand valve is not closed tightly. Although these factors are relatively rare, but also need to attract sufficient attention.

　　For the above reasons, the following measures can be taken to solve the problem of diaphragm metering pumps can not play the pressure: first, regular inspection and replacement of diaphragms; second, keep the check valve clean and intact; again, to ensure that the quality and quantity of hydraulic oil; and finally, to strengthen the daily maintenance of equipment and maintenance work. Through the implementation of these measures, you can effectively improve the efficiency and safety of the diaphragm metering pump.