... Cast Iron Flange blow down valve :Widely used for gas transmission pipeline, regulating station, city gas pipe networkWith GS, ... medium: water, Vapour, Oilsuitable temperature: ≤200Working Codition of Blow Down ValveWidely used for gas transmission pipeline, regulating station, ... face:PTFE, PEEK, nylon, RPTFE Zhejiang Zhongcheng Valve Co., Ltd. is a professional manufacturer of parallel slide valves ...