... Tools Co.,Ltd is one of the top level oilfield wellhead valve manufacturers and suppliers,Website:http://www.zztopdownhole.com, with ... oilfield gate valve, needle valve, mud valve, plug valve, welcome to contact us. Introduction All the oilfield Valves used in the wellhead equipment is ... is high-precision, and the sealing is stably. *Adjustable Choke Valve The needle and core are made of hard alloy. The ...