... :2 1/16-7 1/6 Working temperature:PU throttle valve CaiYouShu and tube remit as a major part of the oil Wells ... output. Wellheadthrottle valae is divided into: 1, adjustable 2, stationaryCixin fixed throttle valve, it through replacement of nozzle size to achieve the purpose ... medium:Petroleum, natural gas, all kinds of drilling fluid Hydraulic throttle valve