Our company which has passed ISO9001:2000 quality management system certification and many other certificates, introduces advanced technology toZY L series, ZYSR-H high-pressure series, and ZYSR series Roots blowers,Industrial blower,Intensive roots blower,Vacuum pump roots blower. They have the traits of high flow, low noise, energy efficiency, smooth operation, long service life and so on. They are widely used in sewage treatment, mining, metallurgy, and chemical industry, light industry, building materials, electricity, flour, aquaculture, vacuum packaging and other fields.