Description：
Portable centrifugal pump system mounted on wheeled chassis for flexible multipoint transfer. Combines the BOSP series' sanitary features - including drainable pump body and crevice-free design - with mobility for batch processing applications. The stainless steel construction meets 3A standards, while the direct-mounted impeller maintains <28µm surface roughness for optimal cleanability. Widely used in food processing, cosmetics manufacturing, and mobile CIP systems.
Suction stroke (suction pressure):
The suction stroke of a pump refers to the pressure of the liquid being pumped into the pump (unit: MPa), The suction pressure value of the pump must be greater than the saturated vapor pressure of the liquid being pumped at the pumping temperature. Pumps below saturated vapor pressure will generate cavitation.
Cavitation allowance:
In order to prevent cavitation of the pump, an additional energy (pressure) value is added on top of the energy (pressure) value of the liquid it inhales. This additional energy is referred to as cavitation allowance. In production equipment, it is common to increase the elevation of the liquid at the suction end of the pump, that is, to use the static pressure of the liquid column as additional energy (pressure), measured in meters of liquid column. In practical applications, there are necessary cavitation allowances NPSHr and effective cavitation allowances NPSHa.
1. Required cavitation allowance NPSHr
The essence is that the pressure drop of the fluid being sent through the inlet of the pump is determined by the pump itself. The smaller the value, the smaller the resistance loss at the pump inlet. Therefore, NPSHr is the minimum value of cavitation allowance.
2. Effective cavitation allowance NPSHa
The actual cavitation allowance obtained after the installation of the pump is determined by the installation conditions of the pump and is not related to the pump itself. The NPSHa value must be greater than NPSHr Generally, NPSHa>NPSHr+0.5m or more.
Medium characteristics:
It refers to the characteristics of the liquid being transported. It is mainly necessary to understand the working temperature, density (specific gravity), viscosity, whether it is an organic solvent, and whether it is explosive or toxic.
1. Working temperature
The working temperature of the medium has a significant impact on pump selection, directly affecting the cavitation allowance, rubber and seal mechanical seals, and the viscosity and specific gravity of the medium. So when selecting, it is necessary to know the working temperature range of the medium.
2. Density (specific gravity)
The density (specific gravity) has an impact on the Reynolds number of the material, the resistance of the pipeline, the head, and directly affects the power of the pump shaft. The magnitude of shaft power is directly proportional to density (specific gravity)
3. Viscosity
The viscosity (specific gravity) has an impact on the Reynolds number of the material, the resistance of the pipeline, the head, and directly affects the power of the pump shaft. It also relates to the selection of pump structure. Vane pumps are not yet suitable for conveying high viscosity media, and the appropriate pump should be selected based on the viscosity of the medium
4. If the medium is organic solvents or explosive media, explosion-proof motor pumps should be selected for the pump, and rubber seals should be made of medium materials that are resistant to organic solvents (such as FFKM, PTFE, etc.)
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