... angle assembling,easy to install. 4. Float ball structure,no leakage,especially suitable for heavy pollution conditions. 5.Good substitution ... 1,000-3,000 square meters Factory Location: Rongyuan Road No,16. Tianjin City, China QA/QC: In House Number ... automatic valve, control valve, shut off valve, actuator valve, electric operated valve Tianjin motorized valve 25s electric/manual over -ride appliance