The piston pump is a positive displacement pump designed to carry a liquid slurry that may contain soft solid particles (meat clusters) while giving minimum damage to these particles during the transfer.
The pump works on the principle of creating a negative pressure to suck liquid to one side of a chamber and a positive pressure on the other side to push the fluid to the discharge. One way valves on each side of the chamber let the liquid flow in and out.
When the piston moves up, it creates a vacuum in chamber C-1 drawing in liquid through valve V-1 and pressure in chamber C-2 compresses forcing the liquid out through valve V-3.
Once the piston has fully extended to one side, it moves back to the other side compressing chamber C-1 and creating vacuum in chamber C-2.
And the cycle repeats insuring a continuous flow of the liquid.
The piston pump developed by STLV has the advantage to require minimum maintenance due to its slow operating stroke speed and the absence of seals at the difference of vacuum pumps commonly used in the surimi industry.
It exists in 3 different sizes to respond to the flow rate requirement adapted to the plant capacity (2-5 m3/h, 5-10 m3/h, 10-20 m3/h).