submersible motor NEMA standard,6inch,8inch,10inch,12inch.the upper and lower guide is ... 12'' water cooling submersible electric pumps at NEMA standard, operating in 50Hz and 60Hz, with power ranging from 3Hp to 300Hp, and ... Safety Certification. In 2009, we got ISO9001 International Standardization Certification. With the support of advanced technology and management systems, our products ...