Classification and characteristics of pneumatic ball valve 
 Pneumatic ball valve O type ball valve, V type ball valve. O type ball valve with a floating structure, the ball core precision castings, the appearance of hard chrome plating, valve seat with enhanced PTFE, stream crossings and the same pipe diameter flow capacity, flow resistance is extremely small, close without leakage, usually a switch valve, particularly suitable for high viscosity, V type ball valve with a fixed structure, open V-shaped incision on the ball core can shear with fiber, granular media can be used according to the process equipment pneumatic or electric actuators, respectively, composed of a pneumatic valve and electric ball valves, pneumatic ball valves, such as to achieve a proportional control valve positioner shall be equipped with electric ball valve to achieve proportional adjustment to be selected electronic electric actuators with servo amplifier. Materials can be divided into: carbon steel ball valve, stainless steel 304 ball valve, 316 ball valves and brass ball valve, the pressure can be divided into: high-pressure ball valve, high pressure and low pressure ball valve pneumatic ball: The main application in the oil, natural gas low-pressure pneumatic valve of the hydraulic oil, engineering, machinery and other industries: the main application in the media, water and other corrosion control on the road! Note model knife gate valve product use: opening and closing parts of the knife gate valve is a gate, the direction of movement of the gate and is perpendicular to the direction of flow, manual knife gate valve can only be fully open and fully closed. can not be adjusted and throttle. Gate two sealing surface, the most common mode of gate valve sealing surface formed two wedge-shaped wedge angle with the valve parameters, usually 50, the wedge type knife gate valve can be made into a whole , called the rigid gate; can also be made to produce small deformation of the gate, in order to improve their craft, to make up for the sealing surface angle deviation in the process, this gate is called the flexible gate type knife gate valve is closed the sealing surface can only rely on media pressure to seal, to rely on media pressure on the sealing surface of the ram pressure to the other side of the seat to ensure the sealing surface of the seal, which is self-sealing most of the knife gate valve is the adoption of compulsory sealed, the valve is closed, we must rely on external force to ram pressure to the valve seat to ensure that the sealing surface of the sealing valve in the pipe shall generally be horizontal mounting