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
Kynar Air Double Diaphragm Pump Bolted Series
A050-SPK-VVKV-S70
$1,378.37Air AODD Pump 1/2". 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 KV-05 Click here to Learn How to Size your Diaphragm Pump and for a...Kynar FKM 1/2" Learn More -
All-Flo Pumps
Conductive Nylon AODD Bolted Model
A050-SPY-TT3T-SF0
$990.00Although 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...Teflon diaphragm 1/2" Learn More -
All-Flo Pumps
Conductive Nylon AODD Bolted Model
A050-SPY-GN3N-SF0
$941.60Although 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
Conductive Nylon AODD Bolted Model
A050-SPY-VV3V-SF0
$1,055.10Although 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... -
Flojet Pumps
Diaphragm pump
G575208
$198.00Air driven, pneumatic pump. Glass filled Polypropylene double diaphragm pump with Santoprene diaphragms and EPDM check valve seats. Springs are Hastalloy.Connections are 3/8" HB . Air connection is 1/4" PLASTIC.
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Flojet Pumps
Duplex Diaphragm pump
G575245
$198.00Air driven, pneumatic pump. Glass filled Polypropylene double diaphragm pump with Santoprene diaphragms and EPDM check valve seats. Springs are Hastalloy.Connections are 1/2" 90 degree elbow. Air connection is 1/4" FNPT brass.
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Flojet Pumps
Duplex Diaphragm pump
G573175
$279.00Air driven, pneumatic pump. Glass filled Polypropylene double diaphragm pump with FKM diaphragms and check valve seats. Springs are Hastalloy.Connections are 1/2" Male Pipe Thread MNPT. Air connection is 1/4" barb brass. 2CFM air. Special mod...
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Flojet Pumps
Duplex Diaphragm pump
G573185
$221.00Glass filled Polypropylene double diaphragm pump with FKM diaphragms and check valve seats. Springs are Hastalloy.Connections are 3/8" MNPT" . Air connection is 1/4HB brass.
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Flojet Pumps
Duplex Diaphragm pump
G573218
$280.00Glass filled Polypropylene double diaphragm pump with FKM diaphragms and check valve seats. Springs are Hastalloy.Connections are 1/2" HB straight. Air connection 1/4” (6.4 mm) Plastic Hose Barb
Used with all sorts of cleaning chemicals an... -
All-Flo Pumps
PP Air Operated Double Diaphragm Pump Bolted Series
A050-SPP-VVPV-S70
$831.73PolyPro Air AODD Pump 1/4". 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...