Unloader
An unloader is used to deactivate
an end of a cylinder. Valve plate depressor type suction
valve unloaders are an example. Suction valve unloaders depress the
valve plate to hold the valve open to unload the cylinder end. See “Cylinder Action, Single Acting
for a drawing of a cylinder with a suction valve unloader.
Ariel
Corporation Application Manual
18-Sep-96