Chemtrols samil [india] pvt. Ltd. Offers chemtrols -samil control valves. Chemtrols - samil v-port control valves are available in 1"[25mm] through 6"[150mm] sizes with full open cv values of 3.0 through 400 in a wide range of materials to Satisfy your flow control needs. Chemtrols - samil special valves Urea valves -with washing attachments Cage control valves Pfa / fep lined plug valves Details on request.