The ME Hot Melt Gun series from Valco Melton uses "air open and air closed" technology to produce accurate glue pattern starts and stops.
Applicators can be used with general packaging grade, PSA pressure
sensitive and fugitive adhesive at temperatures from 200-375 degrees
F. ME Guns can be configured in various spacing configurations, and
most ME Guns are fitted with a 4-way solenoid and are pre-plumbed from
the factory. The solenoids are 24VDC and can be fired from any PLC
and/or most existing pattern controls.