Spúšťacie postrekovače sú mimoriadne jednoduché na dizajn a spoliehajú sa len na niekoľko prvkov, aby dosiahli svoj cieľ rozprašovania kvapaliny cez fľašu. Keď spúšťovú páku potiahnete niekoľkými prstami, aktivuje sa malé čerpadlo. Pumpa nasáva tekutinu zo zásobníka fľaše cez plastovú hadičku. Kvapalina je tlačená cez úzky valec a von z malého otvoru do rozprašovacieho ventilu.
When the trigger is pulled, a small spring in the shroud compresses the fluid. The piston compresses the spring during trigger firing, and when it is released, it is pushed back out of the gasket. As the piston moves back and forth, it pushes the cylinder out, contributing to the pump cycle.
As a result of this extraction motion, the cylinder shrinks, forcing the fluid out in a one-way flow. The motion allows the process to continue without interruption as soon as the trigger is released. Design variations vary from pump to pump and delivery system to delivery system.
