In comparison with conventional sampling valves where a handwheel is used, operation is now uncomplicated, involving only a hand lever. This makes quick sampling possible with only one hand movement. In addition it operates as a "dead man's handle" - automatically closing the valve when released.
The definite closing force of the valve is an additional benefit, because it also significantly increases the service life of the diaphragm.
In addition, in order to lock the valve, a spring cotter pin is used to prevent unintentional operation of the lever. There is also a 'hold-open' function which allows autoclaving of the entire valve.