Flow Control Valve, Ball Valve, Check Valve,Slide Valve 1:Working Pressure:15Bar 2:Materials:Nickel-Plated Brass 3: ... of valves contain the brass valve flow control with swiveling, flow control valves, ball valve, check valve, slide valve, etc.Valves In the field ... a technopolymer control knob. They are suitable for regulating compressed air, water or mineral oil. Ball Valve