Technical characteristics and performance
24
6.2
Principle of operation
Expected use
These pumps coupled to air or hydraulic motors are intended for
transferring, or spraying different liquid or pasty products with a
desired flow rate and output pressure.
Functional description
When the piston (1) rises, the upper ball check (2) closes, the lower
check valve (3) opens and theshovel valve (4) closes. The piston (1)
expels the product from the upper chamber (V2) to the outside and
sucks the product to fill the lower chamber (V1). The shovel pushes the
product into the pump foot (V3).
When the piston (1) is lowered, the ball check (2) opens, the lower
check valve (3) closes and the shovel valve (4) opens. The piston (1)
compresses the fluid in the lower chamber (V1) and transfers it to the
upper chamber (V2). Since the volume of the upper chamber (V2) is
half that of the lower chamber (V1), a volume equivalent to the
upper chamber (V2) is expelled from the pump. The shovel (4) exits
the pump foot (V3) without expelling the product.
