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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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  1. Riverside_DP2B diaphragm pump

    Riverside

    Honda 5.5 hp diaphragm pump 2 in.

    DP2H
    $1,702.00

    Honda 5.5 hp diaphragm pump 2 in., gas engine

    Riverside Pumps' rugged and reliable Diaphragm Pumps are sometimes called "mudhogs" for their ability to pump heavy mud and sludge, thicker than any centrifugal pump can handle. They also have the adv...

    2" 5.5HP Learn More
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  2. Riverside DP3B 3 in. 3.5 hp briggs diaphragm pump

    Riverside

    3 in. 3.5 hp briggs diaphragm pump

    DP3B
    $1,938.00

    Riverside Pumps' rugged and reliable Diaphragm Pumps are sometimes called "mudhogs" for their ability to pump heavy mud and sludge, thicker than any centrifugal pump can handle. They also have the advantage of being able to run dry without damage,...

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  3. 335H-96_5.gif

    AMT Pumps

    2" Diaphragm Trash Pump KIT

    338G-K6
    $2,748.00
    Mud pump. Pump KIT only, NO Engine. AMT 2" Diaphragm pumps features 2-stage, 44 to 1 gear reduction with a large diameter output gear and heavy duty ball bearing construction. Often referred to as Mud pumps, mudhog or Sludge pumps, diaphragm pu...
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  4. Riverside DP3KD 3 in. Kohler Diesel diaphragm pump

    Riverside

    3 in. Kohler Diesel diaphragm pump

    DP3KD
    $3,622.00

    Obsolete due to engine. Parts are still available.

    Diaphragm pumps are positive displacement pumps. They pump aspecific volume for each pump cycle. Diesel Diaphragm pumps move fluidsmore slowly than centrifugal pumps, but can handle mud and large...

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  5. All-Flo A200-CA3-GG3N-080 Stainless Steel Air Operated Double Diaphragm Pump

    All-Flo Pumps

    Stainless Steel Air Operated Double Diaphragm Pump

    A200-CA3-GG3N-B70
    $4,752.45

    316 Stainless Steel Diaphragm Pump 2"NPT. Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. 316SS 2" connections are dual FNPT and Flange (ANSI 150#/DI...

    Stainless, Geolast, Nitrile 2 inch Learn More
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  6. Riverside DP2B 2 BS 550 Diaphragm Pump

    Riverside

    2" B&S 550 Diaphragm Pump

    DP2B
    $1,442.00

    Riverside Pumps' rugged and reliable Diaphragm Pumps are sometimes called "mudhogs" for their ability to pump heavy mud and sludge, thicker than any centrifugal pump can handle. They also have the advantage of being able to run dry without damage,...

    3.5HP diaphragm pump Learn More
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  7. All-Flo C100-NPP-GGPN-G70 PP Air Operated Double Diaphragm Pump

    All-Flo Pumps

    PP Air Operated Double Diaphragm Pump

    C100-NPP-GGPN-G70
    $1,159.49
    PolyPro AODD Pump 1". Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. Models available in PP, PVDF, Nylon, Conductive Nylon, Al and 316SS from .25...
    NC-10 Learn More
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  8. aodd allflo diaphragm pump bk-10

    All-Flo Pumps

    PP Air Operated Double Diaphragm Pump

    C100-NPP-SSPE-G70
    $1,129.18

    PolyPro AODD Pump 1".

    Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Replaces BK-10E. Non-electrical. Models available in PP, PVDF, Nylon, Conductive Nylon, Al and...

    BK-10E Learn More
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  9. All-Flo A150-N33-SS3E-B70 Stainless Steel Air Operated Diaphragm Pump

    All-Flo Pumps

    Stainless Steel Air Operated Diaphragm Pump

    A150-N33-SS3E-B70
    $5,276.63
    Stainless Steel AODD Pump 1 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. Models available in PP, PVDF, Nylon, Conductive Nylon, Al and 31...
    Santo Diaphragm Learn More
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  10. All-Flo SP-15 Stainless Steel Air Operated Double Diaphragm Pump

    All-Flo Pumps

    Stainless Steel Air Operated Double Diaphragm Pump

    A150-F33-TT3T-B70
    $6,305.92
    Stainless Steel AODD Pump 1 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. Models available in PP, PVDF, Nylon, Conductive Nylon, Al and 31...
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