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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. Pulsafeeder LB04SA-PTC1 Chemical Metering Pump

    Pulsafeeder

    Chemical Metering Pump

    LB04SA-PTC1
    $1,291.08
    Chemical metering pump. 25GPD The Series A Plus offers manual control over stroke length and stroke rate. Head mat'l is glass-filed PPL.
    • 4 distinct flow/pressure envelops
    • 100:1 turn down ratio
    • Internally dampened to reduce noise - ideal f...
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  2. Pulsafeeder LPB2SA-PTC1 Metering Pump 5 GPD/250 PSI

    Pulsafeeder

    Metering Pump 5 GPD/250 PSI

    LPB2SA-PTC1
    $848.16
    The Series E Plus offers manual control over stroke length andstroke rate.
    • 20 flow/pressure envelops
    • 100:1 turn down ratio
    • Auto-off-Manual selection switch with indicator lights
    • Built in fuse
    • Clear hinged cover over controls for water resistance...
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  3. allflo_61zbq1r7sql._sl1000__4.jpg

    All-Flo Pumps

    Air Diaphragm pump Aluminum

    A100-NAA-TTYT-B30
    $1,298.67
    Aluminum Air 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. Click here to Learn How to Size your Diaphragm Pump and for a Materi...
    Alum/ptfe/1" Learn More
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  4. Riverside - 03438: Diaphragm repair part

    Riverside

    Shaft seal pump repair kit

    47046
    $69.00

    Shaft seal for Riverside Homelite 2-1/2" high pressure fire pump FP25. Includes both halves of the seal. L1610Z

    If you need help picking other repair parts for Riverside or Homelight pumps just contact us. We can also trouble shoot your applicati...

    2.5" pump parts Learn More
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  5. Seal pump repair kit

    Riverside

    Seal pump repair kit

    A43297C
    $44.00

    Riverside Seal and oring for Riverside Homelite AP22  pump in plastic. Includes both halves of the shaft seal. EPDM elastomers.

    If you need help picking other repair parts for Riverside or Homelight pumps just contact us. We can also trouble shoo...

    AG pump seals Learn More
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  6. riverside_dp3e-.jpg

    Riverside

    3 in. Electric diaphragm pump

    DP3E
    $1,863.00

    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,...

    115/230v Learn More
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  7. All-Flo - A100-FPK-TTKT-S70: pvdf Air Operated Double Diaphragm Pump

    All-Flo Pumps

    Kynar Air Operated Double Diaphragm Pump

    A100-FPK-TTKT-S70
    $2,440.21

    Kynar PVDF Air AODD Pump 1/4". Air operated Diaphragm pump. Suitable for strong acids and bases. Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. Repl...

    1" KT-10 Kynar Teflon Learn More
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  8. All-Flo - A100-FPP-SSPE-S70 polypro Air Operated Double Diaphragm

    All-Flo Pumps

    PolyPro 1" Air Operated Double Diaphragm Pump

    A100-FPP-SSPE-S70
    $1,158.37

    PolyPro Air AODD Pump 1". Chemical double diaphragm pump made in USA. Featuring All-Flo's 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 PE...

    1" PE-10 PolyPro Santo Learn More
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  9. All-Flo - A100-FPP-GGPN-S70 polypro Air Operated Double Diaphragm

    All-Flo Pumps

    PolyPro Air Operated Double Diaphragm Pump

    A100-FPP-GGPN-S70
    $1,905.20

    PolyPro Air AODD Pump 1", Geolast diaphragm. Chemical double diaphragm pump made in USA. Featuring All-Flo's Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-elec...

    1" PE-10 PolyPro Geolast Learn More
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  10. All-Flo - A100-FPP-TTPT-S70 polypro Air Operated Double Diaphragm

    All-Flo Pumps

    PolyPro Air Operated Double Diaphragm Pump

    A100-FPP-TTPT-S70
    $1,428.88

    PolyPro Air AODD Pump 1", PTFE diaphragm. Chemical double diaphragm pump made in USA. Featuring All-Flo's Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electri...

    1" PE-10 PolyPro PTFE Learn More
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