What is the magnetic lockable brass ball valve? The magnetic lockable brass ball valve, a type of brass ball valve that with magnetic device and key, has a function to prevent valve operation without permission, especially suitable for public places. What is the structure of magnetic lockable brass ball valve? The magnetic lockable brass ball valve included three parts: brass ball valve body, magnetic lock and valve key, as shown below: How magnetic lockable brass ball valve works? Brass ball valve is the main part to control the flow open or close, the magnetic lock is used to keep the valve stem from using, the valve keep is to take the magnetic lock off and on, also to switch the ball valve. The brass ball valve at closing position, magnetic lock installed The brass ball valve at open position, the magnetic lock removed The valve key: one end is magnetic key for lock, the other is stem key for brass ball valve