Laboratory circulating water vacuum pump

Laboratory circulating water vacuum pumpIt is a vacuum device that generates negative pressure through circulating water flow, widely used in chemical experiments, vacuum drying, filtration and pressure reduction scenarios. Its core advantages lie in water conservation, corrosion resistance, low noise, and easy operation.

Preparation before installation of laboratory circulating water vacuum pump

Equipment inspection

Check if the pump body is intact and confirm that there is no transportation damage or missing components.

Check the list of accessories: vacuum pump host, power cord, inlet/outlet hose, vacuum gauge, exhaust nozzle, check valve, etc.

Installation environment requirements

Location selection: It should be placed on a stable and dry workbench or ground to avoid vibration; Reserve at least 50cm of space around for heat dissipation and maintenance.

Environmental conditions: Temperature range 0-40 ℃, humidity ≤ 80%, keep away from flammable and explosive gases and corrosive dust environments.

Preparation of water source and power supply

Water source: Use clean tap water or deionized water to avoid impurities blocking the pipeline. It is recommended to equip an independent water tank or connect it to a laboratory pure water system.

Power supply: Confirm that the voltage is consistent with the nominal value of the equipment (usually 220V/50Hz), and the socket needs to be well grounded.

Installation steps for laboratory circulating water vacuum pump

Equipment fixation and connection

Place the pump body horizontally on the workbench, ensuring that the base is in stable contact with the tabletop.

Connect the inlet pipe to the water tank inlet, and the outlet pipe to the exhaust nozzle or external equipment (such as a rotary evaporator).

Install vacuum gauge: Choose a single or dual gauge configuration according to your needs, ensuring that the gauge head corresponds to the exhaust nozzle.

水箱注水​

Open the top cover of the water tank and inject clean water below the overflow nozzle (about 80% capacity). To use, the air needs to be emptied.

Check if the water level sensor is working properly and ensure that the water pump automatically replenishes water when it starts.

Pipeline connection and sealing test

Use card sleeves or flanges to connect external devices, ensuring that the interface is leak free.

Turn on the power, briefly run the pump body, and observe for any abnormal noise or water leakage.

Initial startup and debugging

Pre startup inspection

Confirm that all valves are closed and the power cord is connected correctly.

Check if the mechanical seal is intact to avoid wear caused by idling.

Vacuum degree test

Close the exhaust nozzle, start the pump body, and observe whether the vacuum gauge reading reaches -0.09~-0.1MPa (the ultimate vacuum value may vary slightly due to water quality and temperature).

If the vacuum degree is insufficient, it is necessary to check for pipeline leaks or filter blockages.

Debugging of circulating water system

When running for a long time, connect external cooling water (such as tap water) to the overflow port of the water tank and maintain the water temperature ≤ 30 ℃.

Adjust the flow control valve to balance cooling efficiency and water consumption.

Operating standards

Conventional vacuum extraction process

Tightly connect the extraction sleeve to the equipment being extracted to ensure airtightness.

Turn off the circulating water switch, start the pump body, and monitor pressure changes in real time through a vacuum gauge.

After vacuuming, turn off the power first, and then slowly release the pressure inside the container to prevent backflow.

Parallel use of multiple devices

If multiple exhaust ports need to be connected, it is necessary to ensure that the resistance of each pipeline is balanced to avoid single point overload.

Suggest using a vacuum regulating valve to distribute flow and extend equipment lifespan.

Cooling water circulation mode

When providing cooling for the reaction device, connect the condenser inlet/outlet to the pump body circulation port and turn on the circulating water switch.

Maintenance and upkeep

Daily maintenance

Water quality management: replace the water tank every 7 days to store water, and shorten the cycle when water pollution is severe; Regularly clean the water tank and pipelines.

Sealing inspection: Check the mechanical seals monthly and replace them immediately if any leakage is found.

Long term disuse maintenance

Drain the water tank and pipeline to prevent freezing or microbial growth in winter.

Spray anti rust oil on metal parts and store them in a dry and ventilated place.

Fault handling

Abnormal vacuum degree: Check whether the pipeline is blocked, whether the vacuum gauge is damaged or the seal is ineffective.

Abnormal noise or vibration: Check for bearing wear, impeller foreign object jamming, or unstable base.

Safety precautions

Operation taboos

Do not idle or reverse the pump body to avoid damaging the mechanical seal.

It is strictly prohibited to extract solid particles or corrosive gases (such as Cl ₂, H ₂ S), and anti-corrosion materials and models should be selected according to the gas properties.

Emergency response

In case of sudden power or water outage, immediately turn off the power and release the system pressure.

When water or electricity leakage occurs, cut off the main power supply and contact professional personnel for maintenance.