ቀስቅሴ ስፕሬይተሮች ለመንደፍ እጅግ በጣም ቀላል ናቸው እና በጠርሙሱ ውስጥ ፈሳሽ የመርጨት ግባቸውን ለማሳካት በጥቂት ንጥረ ነገሮች ላይ ብቻ ይተማመናሉ።. ቀስቅሴው ማንሻው በጥቂት ጣቶች ሲጎተት, ትንሽ ፓምፕ ነቅቷል. ፓምፑ በፕላስቲክ ቱቦ ውስጥ ከጠርሙሱ ማጠራቀሚያ ውስጥ ፈሳሽ ይወጣል. ፈሳሹ በጠባብ በርሜል እና ከትንሽ ጉድጓድ ውስጥ ወደ የሚረጭ ቫልቭ እንዲገባ ይደረጋል.
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.