One moving part - a tough, long-lived,
wear-resistant flexible impeller lubricated by the liquid being pumped. No metal-to-metal
pumping action - no gears to jam, clog, or become noisy.
Flexible impeller pumps prime instantly with dry suction lifts to 10 feet and up to 25
feet when wetted. Permits cleaner, safer installations. No foot valve, check valve, or
pre-primer required. ( If water lift is under specification height.)
Note: Never run an impeller style pump for more
than 30 seconds without water. Noticeable impeller damage will occur on some high rpm
pumps, if run 60 seconds or more with out water.
Flexible impeller pumps, in general, require less space because they deliver greater flow
for weight, size and price than other types of pumps.
Both neoprene and oil resistant impellers are available for most models. Use neoprene for
most water pumping applications. Use oil resistant impellers for oils or oily water
Flexible, impeller blades, upon leaving offset cam, create a nearly perfect vacuum for
As impeller rotates each successive blade draws in liquid and carries it from intake to
the outlet port.
When flexible impeller blades contact the offset cam, they bend with a squeezing action
that provides a continuous, uniform flow.
Standard impellers are suitable for continuous operation up to the following limits:
1/4", 3/8", 1/2". Port sizes to 40 ft. head (17.3 psi), 1" - 2"
Port sizes to 70 ft. head (30.3 head)
Special high pressure impellers are available for certain models. Impeller life will be
extended by operating in the lower portion of recommended pressure and temperature
These pumps work best at the Temperature Range 45o to 180o F.