... control valve bellows seal bonnet-two way size: 1/2", 3/4", 1", 11/4", 11/2", 2", 21/2", 3", 4" diaphragm control valve ... 11/2", 2", 21/2", 3", 4"Features:TC control valves are generally used eigher to mix flowing medium or ... to divert one medium into two outlet flows and are often used ... -411-82518382/82518482Fax: +86-411-82518481ruby @ tiandiyi dot cn control valve