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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. General Pump

    KLZ Triplex Plunger 23.7hp

    KLZ40

    $22,126.06
    KLZ Triplex Plunger Pump is a heavy-duty industrial pump with a Duplex SS (ASTM A890) Manifold; with 316 SS Wetted Parts including valve plate and seat for desalination and other corrosive applications.
    • Three horizontal plungers
    • Vertically-arran...
  2. Tsurumi

    Diaphragm Trash pump

    TD4-300

    $2,175.00
    Diaphragm mud trash pumps. Capable of continuous dry operation for seepage dewatering. Handles sand, mud, and sludge.
    • Heavy-duty Honda gasoline engine with oil sensor delivers high power from a compact, reliable design.
    • Two-ply neoprene diap...
    Honda 4 HP GX120 Learn More
  3. General Pump

    KLZ Triplex Plunger 24.0hp

    KLZ45

    $22,126.06
    KLZ Triplex Plunger Pump is a heavy-duty industrial pump with a Duplex SS (ASTM A890) Manifold; with 316 SS Wetted Parts including valve plate and seat for desalination and other corrosive applications.
    • Three horizontal plungers
    • Vertically-arran...
  4. General Pump

    KLZ Triplex Plunger 29.5hp

    KLZ50

    $22,126.06
    KLZ Triplex Plunger Pump is a heavy-duty industrial pump with a Duplex SS (ASTM A890) Manifold; with 316 SS Wetted Parts including valve plate and seat for desalination and other corrosive applications.
    • Three horizontal plungers
    • Vertically-arran...
  5. General Pump

    LH 3Plex Plunger 135.5hp

    LH4015

    $43,466.72
    A heavy-duty industrial pump with a nickel-treated, spheroidal cast iron manifold and internal gearbox.
    • Max. Inlet Pressure: 45 PSI
    • Max. Fluid Temp.: 140ï½° F
    • Inlet Port Thread: 80 mm BSP-F
    • Discharge Port Thread: 36 mm BSP-F
    • Shaft Diameter: 1.96...
  6. General Pump

    LH 3Plex Plunger 135.9hp

    LH5515

    $43,466.72
    A heavy-duty industrial pump with a nickel-treated, spheroidal cast iron manifold and internal gearbox.
    • Max. Inlet Pressure: 45 PSI
    • Max. Fluid Temp.: 140ï½° F
    • Inlet Port Thread: 80 mm BSP-F
    • Discharge Port Thread: 36 mm BSP-F
    • Shaft Diameter: 1.96...
  7. General Pump

    LH 3Plex Plunger 138.4hp

    LH4515

    $43,466.72
    A heavy-duty industrial pump with a nickel-treated, spheroidal cast iron manifold and internal gearbox.
    • Max. Inlet Pressure: 45 PSI
    • Max. Fluid Temp.: 140ï½° F
    • Inlet Port Thread: 80 mm BSP-F
    • Discharge Port Thread: 36 mm BSP-F
    • Shaft Diameter: 1.96...
  8. General Pump

    LH 3Plex Plunger 141.5hp

    LH5015

    $43,466.72
    A heavy-duty industrial pump with a nickel-treated, spheroidal cast iron manifold and internal gearbox.
    • Max. Inlet Pressure: 45 PSI
    • Max. Fluid Temp.: 140ï½° F
    • Inlet Port Thread: 80 mm BSP-F
    • Discharge Port Thread: 36 mm BSP-F
    • Shaft Diameter: 1.96...
  9. All-Flo Pumps

    PP Air Operated Double Diaphragm Pump

    C100-NPP-SSPE-G70

    $2,034.00

    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
  10. General Pump

    LH 3Plex Plunger 143.5hp

    LH6015

    $46,153.07
    A heavy-duty industrial pump with a nickel-treated, spheroidal cast iron manifold and internal gearbox.
    • Max. Inlet Pressure: 45 PSI
    • Max. Fluid Temp.: 140ï½° F
    • Inlet Port Thread: 80 mm BSP-F
    • Discharge Port Thread: 36 mm BSP-F
    • Shaft Diameter: 1.96...
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