The shutoff valve built into the socket opens when the plug is inserted, and closes when the plug is removed. Therefore, it is not necessary to operate the main valve when inserting or removing the plug.
Both the socket and plug are available with male thread connection, female thread connection, or hose connection. Such connections can be combined as desired.
The NL-40 series are identical in size and interchangeable. The NL-20 series are also interchangeable with one another.
The main body is made of steel, brass or stainless steel.
A variety of models are available. You can select the best model to suit your specific operating conditions and applications.