The process of chemical dosing can be found in different chemical process segments. In some or most cases‚ the accuracy‚ reliability of the pump is a critical issue since it determines the aesthetics and/or functionality of the product. The Zenith external gear pumps are the common pump used in this application as well as the Allweiler branded Peristaltic Pumps.
External Gear Pumps– Colfax Zenith branded pumps utilize an intermeshing gear system that rotates within a housing. As the gears rotate‚ a void is created drawing the material into the pump. The tight operating tolerances of the gears and available material options for the housing provide significant advantages in fiber‚ polymer processing‚ adhesives‚ paints‚ and food markets.
|Series||Flow Range||Maximum Pressure|
|9000 Series||0.16 – 27‚000 cc/min||2‚500 psi|
|B Series||0.16 – 200 cc/rev||3‚000 psi|
|H Series||0.16 – 200 cc/rev||4‚000 psi|
Peristaltic Pumps – In a peristaltic pump‚ the pumped volume is bound by the inner surface of the flexible tube and product volume is contained between two contact points of the rotor and the inner surface of the tubing. Peristaltic pumps are used to meter thin to highly viscous liquids‚ pasty‚ neutral or aggressive‚ pure or abrasive liquids‚ gaseous liquids or liquids that tend to foam and even liquids with fibrous and solid components.
|Series||Flow Range||Maximum Pressure||% Solids Permitted |
|AllMove ASL||Up to 1.2 m3/h||4 bar||25%|
|AllMove ASH||Up to 60 m3/h||16 bar||50%|