Series B6400 2-Piece, Standard Port, Bronze Ball Valves are used in commercial and industrial applications for a full range of liquids and gases. It comes standard with actuator mounting pads. The B6400 standard port orifice ensures minimal pressure drop, while Durafill seats, blowout proof pressure retaining stem and chrome plated brass ball provide lasting service. Pressure Rating: For 1/4 - 2 in. - 600psi WOG (non-shock); 150psi WSP; For 2 1/2 to 4 in. - 400psi WOG (non-shock); 125psi WSP.