CKD reversing valve port number and digit analysis introduction

The number of ports and the number of bits of the CKD directional control valve. The number of ports of the directional control valve and the number of the number of ports. The basic function of the directional control valve is to open and close the flow of gas. One commutation is the same as turning on and off several circuits, so that one of the loops is in the on state and the other loop is in the off state, or several circuits are simultaneously cut off. In order to indicate this switching performance, the number of passages of the reversing valve (the number of ports) can be used to indicate that the valve has two ports, namely, the input port (indicated by P) and the output port (indicated by A), and can only control the flow path. The disconnect was disconnected. According to the state of the P→A path rest position, it is divided into a normally open two-way valve and a normally closed two-rope valve with three ports. In addition to P and A, there is also an exhaust port (indicated by 0). According to the state of the zero-stop static position, it is also divided into an output port (indicated by B) of the two-way valve of the normal and the normally-off type. The flow path is P→ four-way valve has four ports, in addition to P, A, 0, there are → 0, or P → B, A → O. It is possible to switch two flow paths at the same time, mainly for controlling double-acting cylinders. The five-way valve has five ports. Except for P, A, and B, there are two exhaust ports (represented by O and O2) for the number of ports and the number of bits of the CKD reversing valve. The valve whose flow path is P→AB→02 or P→B, A→01 is used to control the double-acting cylinder like the four-way valve. The valve can also be used as a double air supply valve (ie, a selection valve), that is, two exhaust ports are respectively used as input ports P1 and P, and there are also five valves above the port, which is a special-purpose change. To the valve. The 2-digit number refers to the number of switching states of the reversing valve. The valve with two switching states is called a two-position valve, and the valve with three switching states is called a three-position valve. A valve with more than three switching states is called a multi-position valve. The number of ports and the number of bits of the CKD reversing valve are usually two-position two-way, two-position three-way, two-position four-way, two-position five-way and the like. The two-position valve has two kinds of reset modes: the automatic reset type can be restored to the original state after canceling the operating force; the other is the valve that cannot be automatically reset (unless the reverse operating force is added), the valve is called Memory three-position valves usually have three three-way, three-position four-way, three-position five-way and the like. Among the three-position valves, the intermediate position state has three states: medium pressure, medium unloading, and medium pressure. The number of passages of the pneumatic reversing valve and the number of ports and the number of digits of the number of switching positions of the CKD reversing valve are shown.