Laboratory reactor kettle pumps are primarily used for the conveyance of high-temperature, high-viscosity polymer melts, such as in the laboratory environments of the resin and chemical fiber industries. Below is a detailed introduction to laboratory kettle bottom pumps:

I. Main Characteristics

High Output Pressure: Laboratory reactor kettle pumps are particularly suitable for environments requiring high output pressure, capable of easily handling the reactive conveyance of high-temperature, high-viscosity polymer melts.

Large Inlet Design: Their large inlet design facilitates high-flow feeding from the reactor kettle, improving work efficiency.

Excellent Self-Priming Performance: With good self-priming performance, they can convey and pressurize polymer materials under vacuum reaction conditions.

Broad Applicability: Suitable for conveying media with a wide range of viscosities, and offering multiple heating and sealing methods to adapt to different working environments and material properties.

II. Main Structural Materials

The main structural materials of laboratory reactor kettle pumps include:

Pump Casing: Stainless steel, alloy steel, or corrosion-resistant alloy.

Gears: Nitrided steel, tool steel, stainless steel + coating, or corrosion-resistant alloy.

Bearings: Tool steel, copper alloy, stainless steel + coating, or corrosion-resistant alloy.

The selection of these materials ensures stable operation of the pump in high-temperature, high-viscosity, and corrosive media.

III. Technical Parameters

The technical parameters of laboratory reactor kettle pumps typically include:

Conveyed Medium Viscosity: A wide range, from 0.01 to 30,000 Pas (or 1~30,000 Pa·s).

Suction Pressure: From vacuum to 4 MPa.

Output Pressure: Up to 35 MPa.

Allowable Pressure Difference: Less than 25 MPa.

Operating Temperature: Generally less than 400°C (some sources state ≤350°C).

IV. Drive and Control System

Drive Device: Laboratory reactor kettle pumps typically use a drive system consisting of a motor + reducer + universal coupling at the pump end.

Control System: Utilizes pressure closed-loop control, such as PLC, frequency converter, or servo drive, to facilitate adjustment to the desired flow rate. By adjusting the pump's speed, near-linear flow output of the gear pump can be achieved.

V. Maintenance and Servicing

To ensure long-term stable operation of laboratory reactor kettle pumps, regular maintenance and servicing are required. This includes checking the pump's sealing performance, cleaning the pump's internal and external surfaces, and replacing worn parts. Meanwhile, attention should be paid to keeping the pump clean and dry to avoid corrosion and clogging.

VI. Precautions

When using laboratory reactor kettle pumps, ensure that the pump is installed in the correct position and securely fixed.

Avoid operating the pump under no-load or overload conditions to prevent damage to pump components.

When changing media or cleaning the pump, first turn off the power and drain the media inside the pump.

Regularly check the pump's lubrication and sealing performance, and promptly add lubricant or replace seals.

In summary, laboratory reactor kettle pumps have numerous advantages and a wide range of applications. When selecting and using them, comprehensive consideration should be given based on the specific working environment and material properties to ensure stable operation and long service life of the pump.

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