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Treatment of metering pumps in the application of several major considerations

When running the dosing system, focus on the following:
    A. cast points pressure
    B. stroke frequency
    C. Elevation height
    D. Altitude
    E. Corrosion of chemicals
    When the metering pump outlet is atmospheric pressure, what measures can improve the pump's repeated measurement accuracy?
    In the metering pump discharge valve installation valve spring can improve the repeated measurement accuracy, but the most effective way to improve is to install a back pressure valve at the end of the pipeline.
    How to adjust the back pressure valve
    1. Never exceed the maximum working pressure of the metering pump.
    2. When the metering pump is pressurized at the suction end, the pressure at the discharge end of the pump is at least 1 bar higher than the pressure at the suction end.
    How to choose the appropriate pulse damper volume?
    Using the metering capacity (ml) of each stroke of the metering pump by 26, the minimum volume (ml) of the pulse damper required to reduce 90% pulsation can be obtained.
    How do I set the pressure on the safety valve?
    The pressure of the safety valve can be adjusted within the rated operating pressure range of the metering pump, and the maximum working pressure of the metering pump is not allowed. The safety valve is designed to prevent the metering pump from overpressure. For example, if the metering pump has a maximum working pressure of 3 bar, the pressure on the safety valve should be set to 3 bar or less to ensure proper operation of the metering pump. Overpressure is one of the main causes of damage to metering pumps.
    If the liquid being conveyed is not water, how does the lift height calculate?
    Divide the rated suction height of the metering pump by the specific gravity of the metering fluid.
    In what circumstances with self-irrigation liquid?
    Suction can be applied in the following cases:
    1. The liquid is easy to volatilize;
    2. The proportion of liquid is larger;
    3. When a higher stroke frequency is required;
    4. Metering pumps work at high altitudes;
    5. In the field application requires a larger tank, and rely on metering pump self-absorption is not feasible circumstances.
    Can you give some advice on the choice of metering pump pump head? What are the problems that arise in relation to the corrosion of the pump head / seal of the chemical and how should it be avoided?
    In the case of measuring the pump head, the usual problem is in the case of metering acid, chlorine, fluoride and hydrogen peroxide. Due to drug concentration and operating temperature of the different, it is difficult to determine the specific pump head material. In the measurement of fluoride, we recommend the use of Viton ® sealed PVC pump head. For most chlorination applications, it is best to use EPDM sealed NP (plexiglass) pump head. For the measurement of hydrogen peroxide mixture can only use PTFE sealed PTFE pump head or stainless steel pump head. Concentrated hydrochloric acid measurement usually use Viton® sealed plexiglass pump head. Concentrated sulfuric acid measurement can be selected PTFE sealed PTFE pump head. The manufacturer of the chemical will give advice, or consult the ProMinent® chemical anticorrosive chart to determine the compatibility of the chemical with the contact material.
    What factors must be considered when measuring the liquid in the pump head?
    The main considerations are liquid viscosity, specific gravity, vapor pressure and temperature.