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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

    Pressure washer pump 5.3HP Hollow Shaft

    TX1506G6

    $603.75
    Pressure washer Pump. TX Series 63, Triplex Plunger Pump.
    • Flanged for direct couple to gasoline engines (SAE J609)
    • Set screw for key way
    • Oversized bearings and dual sight glasses
    • Large, light weight connecting rods
    • Longer life low and high press...
  2. General Pump

    T 63 Triplex Plunger 5.3 Solid Shaft

    TX1812S17-5.3HP

    $458.85
    TX Series 63, Triplex Plunger Pump. Solid Shaft.
    • Flex coupling and bell housing available for direct drive
    • Oversized bearings for long life
    • New generation seal system for longer life
    • Large, lightweight connecting rods
    • Forged brass manifold with ...
  3. General Pump

    TT 51 Triplex Plunger 4.8hp

    TT2035EBF

    $493.35
    TT Series 51, Triplex Plunger Pumps. Hollow Shaft, Flanged for Direct Couple to Electric Motors (NEMA-56C).
    • Forged brass manifold with exclusive lifetime warranty
    • Die cast, anodized aluminum, oil-bath crankcase
    • Solid ceramic plungers with contin...
  4. 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...

  5. General Pump

    EZ 44 3plex 5.1hp Solid Shaft

    EZ2530SUI

    $801.00
    EZ 44 S Triplex Plunger Pump with Solid Shaft - Forged brass manifold with an exclusive lifetime warranty. This pump includes Built-in Unloader and Downstream Injector.
    • Solid ceramic plunger design
    • Flex coupling and bell housing available for di...
  6. General Pump

    T 63 Triplex Plunger 5.3HP Solid Shaft

    TX1512S17-5.3HP

    $458.85
    TX Series 63, Triplex Plunger Pump. Solid Shaft.
    • Flex coupling and bell housing available for direct drive
    • Oversized bearings for long life
    • New generation seal system for longer life
    • Large, lightweight connecting rods
    • Forged brass manifold with ...
  7. General Pump

    TP 51 Triplex Plunger 4.9hp

    TP2520J34

    $508.30
    TP Series 51, Triplex plunger pump, hollow shaft, flanged for direct couple to Gasoline Engines. New, over-sized connecting rods for ultimate crankcase performance. Forged brass manifold with an exclusive lifetime warranty. Ideal for all genera...
  8. General Pump

    TP 51 Triplex Plunger 4.9hp

    TP2520J34UIL

    $591.10
    TP Series 51, Triplex plunger pump, hollow shaft, flanged for direct couple to Gasoline Engines. New, over-sized connecting rods for ultimate crankcase performance. Forged brass manifold with an exclusive lifetime warranty. Ideal for all genera...
  9. General Pump

    Triplex Plunger 4.7hp

    TC1809E175

    $619.85
    TC Series 60, Triplex plunger pump, hollow shaft, flanged for direct couple to electric motors (NEMA-56C). Forged brass manifold with an exclusive lifetime warranty. Ideal for all general cleaning and misting applications.
    • Die cast, anodized...
  10. General Pump

    TT 51 Triplex Plunger 4.8hp

    TT2035EBFUI

    $588.80
    TT Series 51, Triplex plunger pump, hollow shaft, flanged for direct couple to electric motors, with built-in unloader and downstream injector.
    • Forged brass manifold with exclusive lifetime warranty
    • Die cast, anodized aluminum, oil-bath crankcas...
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