Reciprocating Pumps - Diaphragm, Piston, Plunger
These pumps have a diaphragm, piston or plunger which is
reciprocating back and forth through a fixed stoke length. The
diaphragm pumps use a circular semi-flat membrane that is flexed
from a concave to a convex shape within a sealed chamber. There is
no actual sliding contact of parts in the pumping chamber and
therefore these pumps can handle solids, slurries, fibrous and very
thick liquids quit well. Most diaphragm pumps are air operated, but
electric do exist. Electric models are typically very small with
several individual diaphragms working in series being driven by a
rotating angled cam or a single diaphragm being driven by a
mechanical connection to a solenoid. In this case, they are
typically designed as metering pumps. Piston pumps like the name
implies have a piston, ceramic typically, reciprocating within a
very tight tolerance cylinder. Because of their materials of
construction and mechanical design, they produce extremely high
discharge pressures. By making them with several pistons working
together in a single head a semi-steady flow can be obtained. With
any of these pumps special consideration must be given to the
cyclic pressure or hydraulic pulsation’s which
naturally occur.Typical Positive Displacement Reciprocating pumps
include AODD, single diaphragm, electric diaphragm, metering or
proportioning and piston to name a few.
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All-Flo Pumps
PP Air Operated Double Diaphragm Pump Bolted Series
PE-038
$400.87PolyPro Air AODD Pump 3/8" S038-SQP-SEPE-S70. Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. Click here to Learn How to Size your Diaphragm Pum... -
All-Flo Pumps
Conductive Nylon AODD Bolted Model
CB-038
$416.46Although the air powered pump eliminates ignition from electrical motors and internal combustion engines when pumping flammable fluids there is still the possibility of static electrical charge build up on the outside of the pump. All-flo now p... -
All-Flo Pumps
PP Air Operated Double Diaphragm Pump Bolted Series
S038-SQP-GNPN-S70
$422.99PolyPro Air AODD Pump 3/8". Max-Pass valve installed. Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. Replaces previous model PB-038. Click here to ...
3/8" PP Learn More -
All-Flo Pumps
PP Air Operated Double Diaphragm Pump Bolted Series
PV-038
$432.09PolyPro Air AODD Pump 3/8". Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. For handling large size solids order the Max-pass valve under accessor... -
Pulsafeeder
Metering Pump - 12 GPD/80 PSI
LC03SA-PTC1
$459.00Our lowest cost model; Manual function control for stroke length; Optional external pacing only operation with momentary prime switch; Highly reliable timing circuit; EMI resistant; Thermally protected solenoid with auto-reset, Bleed valve assemb... -
Pulsafeeder
Metering Pump - 24 GPD/80 PSI
LC04SA-PTC1
$468.00Our lowest cost model; Manual function control for stroke length; Optional external pacing only operation with momentary prime switch; Highly reliable timing circuit; EMI resistant; Thermally protected solenoid with auto-reset, Bleed valve assemb... -
Pulsafeeder
Metering Pump - 6 GPD/80 PSI
LC02SA-PTC1
$535.50Our lowest cost model; Manual function control for stroke length; Optional external pacing only operation with momentary prime switch; Highly reliable timing circuit; EMI resistant; Thermally protected solenoid with auto-reset, Bleed valve assemb...