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M&W Energy Saving (officially M&W Energy Saving Technology & Science Co., Ltd.) (Chinese: 山水节能) is a system service provider and manufacturer in the fluid energy conservation field headquartered in Hunan, China. The company provides energy saving technology research and development, consultancy and certification, engineering design and implementation and project operation.

Its subsidiary M&W Pump Co. is the largest split case pump manufacturer and one of the leading pump companies in China.

History
Founded in 1996 as Changsha Pump Manufacture Works Company, the company started off as a pump manufacturer with products catered towards a number of sectors including agriculture, water utilities, environmental protection, power generation, ferrous metallurgy, petrochemistry, dredging works and pharmaceuticals.

In 2012, the company was reorganized and officially renamed M&W Energy Saving Technology& Science Co., Ltd.

In 2014, M&W became public listed on the The Chinese National Equities Exchange and Quotations (NEEQ, or "New Third Board").

In 2015, M&W was ranked No. 6 in China's Industrial Energy Conservation Service Top 10 Brands.

Operations
M&W Energy Saving operates primarily in three segments, including comprehensive energy saving service, equipment manufacturing and technology application, through the following subsidiaries:
 * Haichuan Energy Saving Technology Co. is dedicated to fluid system efficiency diagnosis, research and comprehensive energy saving service. It adopts “4A” highly efficient energy saving technology and Energy Performance Contracting model.
 * M&W Pump Co. has 2 campuses with combined annual capacity of over 15,000 sets. It produces 27 different types of split casing pump, covering 2384 different specifications of products. M&W manufactures split case pump with discharge diameter from 80mm to 1400 mm.
 * Miluo Changchuan Casting Co. is dedicated to mold design, development and manufacturing, casting, smelting and polishing with single casting capacity of 15 tons and annual total capacity of 2,600 tons.
 * M&W Energy Saving Research Institute Co. is dedicated to technology R&D and consultancy of new energy saving technology and products.

International
M&W Energy Saving exports its products and services to more than thirty countries and regions, including North America, Europe, Middle East and Southeast Asia. Outside China, it has sales representatives in Malaysia, Sri Lanka and Myanmar.

The company also has long-term partnership with the world’s leading pump manufacturers including Grundfos, Wilo, ITT, KSB and Ebara.

R&D and Innovation
M&W maintains strategic alliance with various research centers in leading universities including Tsinghua University and Chinese Academy of Sciences. It has been certified by ISO 9001 and ISO 14001 and received over 50 patents.

M&W founded and pioneered the MOAR framework as a systematic energy-saving approach to tackle complex industrial water systems. Combined with CAE and 3D laser scanning in pump design, it achieves an average of 32.9% energy saving in the case studies.