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PUMP TYPES > Positive Displacement

Positive Displacement pumps mechanically displace a known volume of liquid so that the pumps, running at a constant speed, positively displace a liquid volume at a fixed rate. PD pumps can be subdivided into two main categories; reciprocating pumps and rotary pumps.

Within the two main categories, the pumps may operate by means of various pumping techniques. We offer Wilden and SandPIPER Air Operated Double Diaphragm (AODD) pumps as reciprocating pumps and Johnson Flexible Impeller, Johnson Rotary Lobe, Johnson TopWing and Stork Internal Gear pumps as rotary pump types.
 
Air Operated Double Diaphragm Pumps:
Wilden , SandPIPER S , SandPIPER SA , SandPIPER SB
 
Flexible Impeller Pumps: Johnson FIP - Industrial
 
Internal Gear Pumps: Stork TP & SRT
 
Rotary Lobe Pumps : TopLobe, TopWing
 
Peristaltic Pumps : Verder, Boyser