What is the working principle of the plunger metering pump?
The plunger metering pump directly draws in and discharges the working medium (yellow) by the reciprocating motion of the plunger. Since the plunger and seal are in contact with the media, choosing the right plunger material and seal form will ensure that the pump will perform as expected during operation. The plunger metering pump includes a valve pump and a valveless pump. Plunger metering pumps are widely used in the petrochemical industry due to their simple structure and high temperature and pressure resistance. The plunger material is made of stainless steel and oxidized ceramic. The oxidized ceramic has the characteristics of corrosion resistance and high hardness.
In view of the shortage of ordinary plunger pumps for high viscosity media under high pressure conditions, a valveless rotary plunger metering pump has received more and more attention and is widely used in high viscosity media such as syrup, chocolate and petroleum additives. Metering added. Due to the structural disadvantage of the inability to achieve complete isolation between the metered medium and the lubricant in the pump, the plunger metering pump is subject to many limitations in fluid metering applications where high pollution resistance is required. Plunger metering pumps are used to accurately meter liquids containing solid particles into pressurized or atmospheric vessels and piping. Different types of plunger metering pumps can be equipped with variable frequency motors (can receive 4-20mA current signal) or explosion-proof motors according to requirements. The plunger pump head has a simple structure, high economy, high measurement accuracy, and needs to select and maintain a good seal. The lateral automatic alignment between the plunger and the seal ensures minimal wear between the two.
SJ1-S type plunger metering pump parameter characteristics: single head maximum flow: 50000 liters / hour; maximum discharge pressure: 50MPa; steady state accuracy ± 1%; medium viscosity: 0-800mm2 / s; delivery medium temperature up to 450 ° C the above. For more product introduction and price requirements of metering pumps, other instruments are solenoid valves, spectrophotometers, etc.
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