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Comparators & Hand Pumps

Field calibration of pressure instruments often requires a portable source of stable pressure. We have hand operated pneumatic pumps capable of pressures up to 4500 kPa / 650 PSI, with hydraulic options up to 1,000 Bar / 15,000 PSI. We also supply a wide range of regulators, valves, controllers and manifolds to allow precise pressure control of compressed air or nitrogen in your workshop or laboratory.

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  1. Ralston DPPV Pneumatic Vacuum / Pressure Hand Pump (9 Bar)

    Ralston DPPV Pneumatic Vacuum / Pressure Hand Pump (9 Bar)

    Pneumatic Vacuum & Low Pressure Hand Pump (-23" Hg to 9 Bar / 125 PSI)

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  2. Ralston Nitropak Portable Nitrogen Pressure Source (210 Bar)

    Ralston Nitropak Portable Nitrogen Pressure Source (210 Bar)

    • 210 Bar / 3000 PSI Range
    • Integrated Refillable Gas Cylinder
    • Ralston Quick-Test Male Pressure & Fill Port Connections
    • Optional NPT / BSPP Adapters & Hoses

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  3. Ralston XHGV Hydraulic Pressure Hand Pump (345 Bar)

    Ralston XHGV Hydraulic Pressure Hand Pump (345 Bar)

    • 5000 psi (350 bar)
    • XHGV pump
    • 1/4" female NPT gauge swivel
    • 3ft hose
    • 1/4" MNPT process connection XHGV-0000

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  4. Ralston HPGV Hydraulic Pressure Hand Pump (210 Bar)

    Ralston HPGV Hydraulic Pressure Hand Pump (210 Bar)

    • 3000 psi (210 bar) HPGV Hydraulic pump
    • 1/4" female NPT gauge swivel
    • 3ft hose
    • 1/4" MNPT process connection.

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  5. Ralston APGV Pneumatic Pressure Hand Pump (20 Bar)

    Ralston APGV Pneumatic Pressure Hand Pump (20 Bar)

    • Generates up to 300 psi
    • Precise fine adjustment
    • Quick disconnect adapter

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  6. Ralston AP0V Pneumatic Pressure Hand Pump (20 Bar)

    Ralston AP0V Pneumatic Pressure Hand Pump (20 Bar)

    Pneumatic Medium Pressure Hand Pump (20 Bar / 300 PSI)

    $493.80 ex GST
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  7. Ralston DV0V Pneumatic Vacuum Hand Pump (-25" Hg)

    Ralston DV0V Pneumatic Vacuum Hand Pump (-25" Hg)

    Pneumatic Vacuum Hand Pump (-25" Hg / -635mm Hg)

    $498.70 ex GST
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  8. Ralston DP0V Pneumatic Pressure Hand Pump (9 Bar)

    Ralston DP0V Pneumatic Pressure Hand Pump (9 Bar)

    Pneumatic Low Pressure Hand Pump (9 Bar / 125 PSI)

    $498.70 ex GST
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