Causes of insufficient pressure in circulating water vacuum pumps include poor pump body sealing, rotor wear or damage, and malfunctions in the water circulation system. Solutions include checking the pump casing temperature and water outflow, cleaning the vacuum pump, and inspecting connecting hoses for damage or air leaks. A detailed analysis follows:
I. Causes of Insufficient Pressure
1. Poor pump body sealing: Aging, wear, or improper installation of seals can compromise the pump's sealing performance, thereby reducing suction power.
2. Rotor wear or damage: Wear or damage to the rotor directly affects the vacuum level, leading to reduced suction.
3. Water circulation system malfunctions: Issues such as low water levels in the tank, obstructed water flow within the pump, or clogged filters can impair suction.
4. Improper pump selection: A mismatch between the pump model and actual operating conditions can result in insufficient suction.
5. Environmental factors: Excessively high or low ambient temperatures can affect water evaporation or condensation, thereby impacting the pump's operating efficiency.
II. Solutions for Insufficient Pressure
1. Check pump casing temperature and water outflow: If the pump casing overheats and no water flows from the outlet, increase the water inflow rate to balance the inlet and outlet flows.
2. Clean the vacuum pump: If water flow is normal but the pump appears dirty, clean the unit—paying special attention to the vacuum flask, as it plays a crucial role in maintaining pump pressure.
3. Inspect connecting hoses for damage or air leaks: If hoses are damaged or leaking air, replace them; typically, size 6 latex tubing is used. 4. Check the vacuum vessel for faults: If the aforementioned issues have been ruled out but the pressure still fails to rise, the vacuum vessel may be defective; an engineer should be contacted to replace it.
5. Regular inspection and maintenance: Conduct routine inspections and maintenance on the pump to identify and resolve potential issues promptly, ensuring sufficient suction power.
6. Optimize the water circulation system: Ensure the water tank level is within the normal range, keep water flow within the pump unobstructed, and regularly clean filters; optimizing the water circulation system can effectively enhance the pump's suction power.
7. Select the correct model: Choose a vacuum pump model appropriate for the actual operating conditions to ensure sufficient suction power during operation.
8. Optimize environmental conditions: Ensure the pump operates within suitable temperature and humidity ranges to prevent adverse effects on performance caused by excessively high or low ambient temperatures.