Pneumatic joints can be divided into:
    1. Open and close at both ends:
    When not connected-when the ferrule of the mother body moves to the other end, the stainless steel ball automatically rolls outward, and the child body is disconnected by the action of the common valve spring force of the mother body and the child body, and the valves of the child body and the mother body are separated Close, instantly block fluid flow.
    When linking-when the child body is inserted into the mother body, the ferrule returns to its original position under the action of the spring, and the steel ball rolls to lock the child body tightly connected, and the valves of the mother body and the child body push each other to open, fluid flow, O-shaped The ring can completely block the leakage of fluid.
    2. Open at both ends
    No link-when the ferrule of the mother body is pushed to the other end, the steel ball automatically rolls outward, therefore, the child body is removed; since neither the child body nor the mother body has a valve, the fluid flows out.
    Link-When the child body is inserted into the mother body, the ferrule is pushed to the previous position by the force of its spring to lock the steel ball, fluid flows, and the O-ring is used to prevent liquid leakage
    3. Single-circuit open and close type
    When not connected-When the ferrule of the mother body moves to the other end, the stainless steel ball automatically rolls outward, and the child body is bounced by the reaction force of the valve spring, and the valve can be automatically closed to block fluid flow.
    When the pneumatic connector is connected-when the child body is inserted into the mother body side with the ferrule, the valve is opened to cause fluid to flow, the washer is pushed back to the original position by the force of the spring, and the stainless steel ball will be locked to ensure the child/parent body connection. The gasket can completely block the leakage of fluid.