Main factors affecting the sealing performance of hydraulic valves

Main factors affecting the sealing performance of hydraulic valves

The main factors affecting the sealing performance of hydraulic valves:

The main factor in the damage of the sealing element is the impurities in the working fluid. These impurities are ground between the sealing elements, causing leakage of the valve. Therefore, foreign countries have proposed the corresponding level of hydraulic components, should use the corresponding precision filter. They believe that the 5μm oil pump sealing element, if using a filter with a filtration accuracy of 3/μm, can last 10 times longer than 10μm.

However, the valve for the hydraulic support has a very harsh working environment. In the coal mining face, the total length of the oil pipe is more than 1000 meters, and there are more than 4,000 joint sockets. The liquid tank has no special dustproof facilities. There is a large amount of floating impurities in the emulsion, and there are more coal powder, rock particles and iron filings in the bottom of the column and the valve cavity. The inlet valve plug and the valve seat, due to the frequent opening and closing, the high liquid flow rate, the seal will quickly fail. Practice has proved that it is very difficult to reduce the pollution impurities of the hydraulic system of the bracket. It has been conceived to use a high-pressure filter at the emulsion pumping station and to add a small filter at the inlet of each bracket. However, it was quickly blocked at work and formed a current cut.

On the other hand, with the development of hydraulic support technology. Higher requirements are placed on the performance of the valve and the service life of the valve. At present, the life of the valve is measured by the total flow rate of the emulsion passing through the valve to be tested and the number of opening and closing of the valve under the condition of a filter and a magnetic filter device at 120 mesh. However, in fact, the indoor type test is quite different from the actual work result in the underground. Formal experiments in many countries have increased the need for anti-pollution, either by incorporating appropriate pulverized coal into the emulsion or by adding mechanical impurities.

To this end, it is necessary to use a new type of sealing pair that is resistant to contamination and suitable for downhole working conditions.

Dingmin Pharmaceutical supply Eluxadoline API and Eluxadoline Intermediates with high purity and best price. The main products CAS No are as follows: 864821-90-9, 623950-02-7, 864825-23-0, 78515-16-9, 1391712-57-4. Sample can be sent if you request.

Welcome to do business with us. Please email to us directly.

Eluxadoline Intermediates

Cas 623950-02-7,Eluxadoline Intermediates,4-Phenyl-1H-Imidazol-2-Yl

Shijiazhuang Dingmin pharmaceutical Sciences Co.,Ltd , https://www.dingminpharma.com