How do plunger metering pumps effectively address leakage?
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This post was last edited by WQC on 2009-5-17 at 17:08. Hello, teachers: Piston metering pumps start to leak fluid from the packing after being in use for a short period of time. This leads to material loss, environmental contamination, and it may also affect the flow rate, thereby prolonging the production cycle. Every time, it’s necessary to replace the packing, which is very troublesome. Is there a good way to solve this? Additionally: It’s also a problem that the ball inside the outlet check valve of the pump often fails to return to its proper position. Is there any good solution for this?
How big is the metering pump? The metering pumps we use generally don’t have these problems. It is recommended to inform the metering pump manufacturer of the actual operating conditions so that they can assist in resolving the issue; if they are unable to solve it, I think it would be best to switch to a metering pump from another brand. :lol
The flow rate of the metering pump is 500 kg/h, and the pressure is 10.0 MPa. After use for some time, the threads on the internal adjustment screw and adjustment nut (both made of copper) were completely worn out, resulting in an inability to adjust the flow rate anymore. Are there any good manufacturers of metering pumps? Could you recommend some?)
Our factory’s ones are the same. Plunger metering pumps often leak; after taking them apart last time, it was found that the plunger had worn out What should I do?
Although copper has good properties such as corrosion resistance, its wear resistance is poor. Over time, the fit between the valve ball and the valve seat becomes less flexible, leading to frequent sticking. It is recommended to replace the adjustment screw, nut, and valve ball with stainless steel versions; if you are not able to carry out the processing yourself, contact the manufacturer to have them manufactured for you
Plunger pumps generally use standard packing, such as polytetrafluoroethylene and similar materials.
Leakage is inevitable with packing seals; the best solution is to replace them with diaphragm metering pumps, which will prevent leakage
Leakage in piston pumps is a significant problem in field management, and the main reasons for this are as follows: 1. Selection of the packing material (its compatibility with the medium, as well as the packing’s strength and self-lubricating properties)； 2. Installation issues: the concentricity of the plunger within the packing box, and the tightness of the packing ； 3. Timeliness of maintenance: Due to the inherent drawback of packing seals, which is their tendency to wear out, adjustments need to be made promptly ； Solution: Through investigation over a certain period of time, the best solution is to use imported diaphragm metering pumps, which generally function without major problems for 4–5 years.