Connector, hand valve, distribution valve? What do you mean by this? In fact, it has its own name, which is called "distributor".
Distributor is a kind of generally accepted name. Its English name is kegcoupler. The word "coupler" is called coupler and connector in electronic device terms. It is literally translated as "barrel coupler". In fact, it is inaccurate to say "distributor". When there is no better translation, we also temporarily call it "distributor".
Function of distributor
The distributor can be thought of as a key. Correspondingly, the wine spear on the barrel is the lock. They need to be matched together to realize the task of "pulling" the wine out of the barrel.

One end of the distributor is connected to the barrel, and the other pipe is connected to the carbon dioxide tank. The barrel is pressurized by carbon dioxide, and then the beer is pressed out from the outlet of the distributor. This is the basic principle of the distributor task.