Changsha Zoomlian Pump Co., Ltd. 长沙中联泵业股份有限公司

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    Do multi-stage pumps for mining require explosion-proof motors?

    Publication Date:

    2025-08-31

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    Do multistage pumps for mining require explosion-proof motors? Let's see how the Shanxi coal mine project decides this time. I just arrived at the company last Monday when I received a consultation call from a coal mine in Datong, Shanxi. The purchasing engineer, Mr. Li, asked right away: "We need to replace the multistage pump for underground drainage. Do we really need to use an explosion-proof motor? We asked two multistage pump manufacturers before, and their answers were different." As an experienced person in Zhonglian Pump Industry, Zhonglian Pump Industry the answer is definitely yes. Multistage pumps for coal mines must be equipped with explosion-proof motors.
     
    Multistage Pump for Mining Use
     
    After understanding the situation, their mine previously used ordinary motors Last year during the rainy season, due to excessive gas concentration underground, the safety inspection department required rectification. This time, during the new procurement, they were worried about spending extra money on unnecessary explosion-proof motors and also concerned about safety risks if they chose cheaper options. I first asked Mr. Li to send the underground operation area's gas detection report and drainage parameters. It was found that their operation area is a gas mine, and according to the "Coal Mine Safety Regulations," motors with explosion-proof rating ExdI are indeed required. However, Mr. Li still had concerns: "Will explosion-proof motors be much more expensive than ordinary ones? Can the delivery meet the end-of-month shutdown maintenance?" I contacted the technical department that day and, based on their drainage flow rate (50m³/h) and head (120m), customized the MD85-45×3 model multistage pump for mining use, paired with the YB3 series explosion-proof motor. The quotation specifically noted the motor's explosion-proof certification number and promised delivery within 15 days—just in time to align with their maintenance schedule.
     
    The next day, I went to Shanxi for a face-to-face meeting with the plan. Mr. Li repeatedly reviewed the explosion-proof motor's test report and asked about motor cooling and maintenance issues. We did some calculations on-site: although the initial cost of explosion-proof motors is 15% higher, it can avoid production losses caused by safety issues. Moreover, this motor's failure rate is 30% lower than ordinary motors, making it more cost-effective in the long run. Last Thursday, we received their purchase contract, and the first batch of pumps was shipped to the mining area yesterday. In fact, many coal mine customers struggle with the issue of explosion-proof motors. The key is to combine the actual underground environment and safety regulations when deciding, as both safety and efficiency are indispensable.
     

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