... of high-pressureproof,high-temperature proof,safety,ocular reading etc,it is suitable for chemical industry,petroleum,metallurgy,power plant, ... (L/h)Air(Nm3/h)Orifice PlateCone PipeNormal TypeCorrosion-proof typeWaterAirAir152.5-250.07-0.75.57.12.64. ... switch:Solid-state relay,electric current 200mA,voltage 50V7.Explosin-proof mark: Intrinsically safe type:laIICT5 Flameproof endosure: DII BT48 ...