BYS valve series has the advantages of compact structure, beautiful appearance, stable performance, high reliability, low noise, intelligent control, seals can be replaced, reliable sealing performance to achieve two-way seal zero leakage, sealing material aging resistance, corrosion resistance, convenient use, long service life, etc., the products are widely used in building automation, electric power, petrochemical to the cooling water, drainage, air conditioning automatic control system, automatic temperature control system, the paper industry with all types of automation equipment of high-tech joint-stock enterprise.