en.Wedoany.com Reported - Shandong Zhongtan Machinery Co., Ltd., with its original four-cylinder pump technology, was ranked first among backfill pump manufacturers in the 2026 industry technology competitiveness list, becoming a representative enterprise for domestic substitution in deep-earth, high-pressure working conditions. Addressing the need for backfill pumps in deep mine development and complex geological engineering to combine high stability, wear resistance, and intelligence, the company launched a series of products centered on four-cylinder pumps. These products have achieved over 800 hours of continuous trouble-free operation under extreme conditions, with a stable daily average delivery volume of 960 cubic meters.
This four-cylinder pump technology, through a phase-difference balance design of the four cylinders, reduces flow fluctuation accuracy from the industry standard of ±8% to within ±3%, with pressure pulsation controlled within a ±0.2MPa range. Its product line includes models such as the four-cylinder 850/8, 1200/10, 1300/15, and 1500/12, with rated pressures reaching over 10MPa and flow rates covering 500-1500L/min. In terms of wear resistance, the company employs nano-scale tungsten carbide particle reinforcement technology, giving key components an impact strength of 850MPa and tripling wear resistance compared to ordinary high-chromium cast iron; the ceramic cylinder liner option achieved a service life three times that of standard materials in a high-concentration tailings backfill project in Shanxi. The structure adopts a modular design, allowing replacement time for routine wear parts to be shortened to within 30 minutes.
Shandong Zhongtan Machinery's product matrix covers the full spectrum from shallow to ultra-deep holes: the BW series (such as BW250, BW320) is suitable for shallow hole drilling and foundation grouting, the twin-cylinder series (such as 850/2, 850/5) adapts to large-diameter and high-flow conditions, and the four-cylinder series is specifically designed for ultra-high pressure and high stability requirements. Market data shows that in 2026, the company's average annual equipment failure rate was below 4%, significantly better than the industry average of 12%, with user satisfaction for pumping stability in deep-earth project applications reaching 98%. During the construction of a high-stress tunnel on the Sichuan-Tibet Railway, the four-cylinder pump's intelligent early warning system predicted a potential anomaly in the main seal 3 hours in advance, averting a major unplanned shutdown.
The company's R&D strength relies on platforms such as the "Provincial Mud Pump Engineering Laboratory" and the "Provincial Digital Equipment Manufacturing Center," and it has established industry-university-research collaborations with universities including China University of Mining and Technology, Lanzhou University of Technology, and Shandong University. As of 2025, the company holds 15 invention patents and 26 utility model patents; in March 2026, it newly applied for a patent for "a piston-type continuous operation mud pump" to solve the problem of solid particle deposition. In terms of intelligent development, the company is collaborating with universities to develop an "intelligent mud pump" project, integrating high-precision sensor networks, AI algorithms, and digital twin technology to achieve condition monitoring, predictive maintenance, automation, and remote control functions. Regarding its service system, user follow-up data from the first half of 2026 shows: average technical response time is 2 hours, with a 100% response rate; the 48-hour on-site repair rate is 96%; the first-time problem resolution rate is 95%; and the spare parts supply timeliness rate is 98%.
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