Question Answer:
Question one: When running dosing system should pay attention to what important matters?
A: A. pressure on the injection point; B. stroke frequency; C. suction height; D. altitude; E. corrosive chemicals
Question two: When the metering pump outlet for atmospheric pressure, what measures can be taken to improve the pump repeat measurement accuracy?
A: The valve spring on the metering pump discharge valve improves repeat metering accuracy, but the most effective way to do this is to install a backpressure valve at the end of the line. Valve import pump industrial washing machine
Question three: how to adjust the back pressure valve?
A: 1. Never exceed the maximum working pressure of the metering pump.
2. When the dosing pump has pressure on the suction side, the pressure on the discharge side of the pump must be at least 1 bar higher than the pressure on the suction side.
Question 4: How to choose the appropriate pulse damper volume?
A: By multiplying the metering capacity (ml) for each stroke of the metering pump by 26, the minimum volume (ml) of the pulsation dampener required to reduce the pulsation by 90% is obtained.
Question five: how to set the pressure relief valve?
A: The pressure of the safety valve can be adjusted within the range of the rated working pressure of the metering pump, and it is not allowed to exceed the maximum working pressure of the metering pump. The safety valve is designed to prevent over-pressurization of the metering pump. For example, if the maximum working pressure of the metering pump is 3 bar, the relief valve pressure should be set at 3 bar, or lower to ensure proper operation of the metering pump. Overpressure is one of the major causes of dosing pump damage.
Question 6: If the delivery of liquid is not water, how to calculate the suction height?
A: The metering pump rated suction height divided by the proportion of liquid measurement.
Question seven: Under what circumstances with self-irrigation suction?
A: 1.Measurement of liquid volatile;
2. Measuring the proportion of liquid larger;
3. When higher stroke frequency is required;
4. Metering pump work in high altitude areas;
5. In the field of application requires a larger tank, and rely on the self-priming pump is not feasible.
Q8: Can you give some advice on pump head selection? What problems usually occur when it comes to chemical pump head / seal corrosion, and what should be avoided?
A: When it comes to dosing pump heads, the usual problem is with acid, chlorine, fluoride and hydrogen peroxide. Due to the different drug concentration and operating temperature, it is difficult to determine the specific pump head material. When measuring fluoride, we recommend using a Viton® sealed PVC pump head. For most chlorination applications, it is best to use an EPDM sealed NP (plexiglass) pump head. For the hydrogen peroxide mixture can only be measured PTFE PTFE sealed PTFE pump head or stainless steel pump head. The measurement of concentrated hydrochloric acid is usually used Viton. Sealed plexiglass pump head. Concentrated sulfuric acid can be selected PTFE sealed PTFE pump head. Manufacturers of chemicals may give advice or consult ProMinent ™ chemical preservative charts to determine the compatibility of chemicals with contact materials.
Question nine: When measuring the liquid in the pump head, which factors must be considered?
A: The main factors considered are the viscosity, specific gravity, vapor pressure and temperature of the liquid.
This article Keywords: metering pump
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