Air Operated Diaphragm

 

 

Flexible Impeller

Positive Displacement Pumps
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. Johnson Pump offers Air Operated Double Diaphragm (AODD) pumps as reciprocating pump type and Flexible Impeller, Internal Gear and Rotary Lobe pumps as rotary pump types.

Application field

Generally speaking, Positive Displacement pumps' capacity are proportional to speed, they are reversible, self-priming and can pump low to high viscosities. Among Johnson Pump’s most important segments can be mentioned:

•	Food and Beverage
	For all types of hygienic applications and applications demanding gentle handling
•	Pharmaceutical
	Hygienic and gentle product handling with extremely precise dosing
•	Chemical
	Handling of aggressive and hazardous chemicals, slurries and pastes
•	Petrochemical
	Asphalt stations and bitumin products as well as fuels and oils and lubrication
•	Pulp & Paper
	Agressive chemicals and abrasive sludge, fillers, inks

The positive displacement pump programme
	AODD - Air Operated Double Diaphragm Pumps	OptiFlo, TopAir
	Flexible Impeller Pumps	Bronze Clutch-driven, DC motor-driven, FIP series, Multipurpose bronze
	Internal Gear Pumps	TopGear L, TopGear G, TopGear H
	Rotary Lobe Pumps	TopLobe, TopWing

 

 

 

 

Internal Gear

 

 

 

Rotary Lobe