Execution standard for mining wear-resistant multistage centrifugal pump

Category: Water pump knowledge

2025-08-18

As a specialized fluid transportation equipment in the mining field, mining wear-resistant multistage centrifugal pumps are subject to strict standard specifications in terms of performance, structure, and safety. These standards not only ensure the efficient operation of the pump but also ensure the safety and stability of mining operations. The following will explain in detail the main standards implemented by mining wear-resistant multistage centrifugal pumps and their related content.

1. The execution standard for mining wear-resistant multistage centrifugal pumps is "Multistage Centrifugal Pumps for Coal Mines" (standard number MT/T 114-2005).

This standard was officially implemented by the National Development and Reform Commission on July 1, 2006. This standard replaces the MT 114-1985 version released in 1985 and is suitable for conveying mine water with solid particles ≤1.5% and temperature ≤80℃. It covers two types of pumps: D-type ordinary pumps and MD-type wear-resistant pumps. The D-type pump is suitable for clean water media, while the MD-type pump has a wear-resistant design and must meet the requirement of no major repairs for 6,000 hours under clean water conditions, and the efficiency drop does not exceed 6%.

2. In terms of performance specifications

The standard stipulates that the vibration intensity must comply with JB/T8097-1999 Class C standards, and the noise index must comply with JB/T8098-1999 Class C. The temperature limit of rolling bearings shall not exceed 75℃, and the inlet section pressure of the shell pressure test shall reach ≥0.6MPa. In addition, the impeller static balance accuracy level is required to reach G6.3 level. These performance specifications ensure the stability and reliability of the pump during operation.

3. Structural requirements

When the supporting motor power is ≥110kW, the mining wear-resistant multistage centrifugal pump needs to be equipped with a common base. The shaft seal can be in the form of packing seal or mechanical seal to adapt to different working conditions. The material of the nameplate is limited to stainless steel or brass to ensure its corrosion resistance and durability. In the structural design, the wear resistance and corrosion resistance of the pump body material are also emphasized. Cast steel material is usually used to meet the use requirements in the harsh environment of mines.

4. In terms of testing and inspection

The standard stipulates that the performance test must be implemented in accordance with GB/T3216-1989, and the type test cycle shall not exceed 2 years. The factory inspection needs to verify whether the flow, head, efficiency and other indicators meet the standard requirements. These test and inspection requirements ensure that every mining wear-resistant multistage centrifugal pump that leaves the factory can meet the established performance standards.

5. Other aspects

1. With the continuous advancement of technology and changes in mining operation needs, the MT/T 114-2005 standard is also constantly being updated and improved. In 2020, the National Coal Mine Safety Supervision Bureau initiated the standard revision project, which is planned to be completed by China Coal Science and Industry Group Tangshan Research Institute and other units. The focus of the revision includes optimizing the technical requirements for the axial force balance device, adding specifications for the thin oil lubrication system, and improving the application standards for wear-resistant materials. These revisions aim to further improve the performance and reliability of mining wear-resistant multistage centrifugal pumps.

2. In practical applications, mining wear-resistant multistage centrifugal pumps also need to follow a series of installation and use specifications. For example, during installation, pay attention to the fact that the weight of the pipeline should not be borne by the pump to avoid damage to the water pump; the anchor bolts must be tightened during installation and checked regularly to prevent them from loosening; regulating valves and pressure gauges should be installed on the inlet and outlet pipelines of the pump and other accessories to facilitate maintenance and safe use. In addition, a suitable pump type and material should be selected according to the medium characteristics and working conditions to ensure the efficient operation and long-term stability of the pump.

3. Mining wear-resistant multistage centrifugal pumps are widely used in the mining field. It can be used not only for conventional operations such as mine drainage and factory drainage, but also for complex working conditions such as sewage treatment. Its characteristics of high efficiency, energy saving, wear resistance and reliability make it play an irreplaceable role in mining production. At the same time, with the country's continuous improvement of safety production and environmental protection requirements, the performance and materials of mining wear-resistant multistage centrifugal pumps are also constantly being upgraded and improved.

In summary, the standards implemented by mining wear-resistant multistage centrifugal pumps cover many aspects such as performance, structure, testing and inspection. The strict implementation of these standards not only ensures the efficient operation and reliability of the pump, but also provides a strong guarantee for the safety and stability of mining production. In the future, with the continuous advancement of technology and changes in mining operation needs, these standards will continue to be updated and improved to adapt to new challenges and needs.

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