Fixing Low Vacuum Pressure: Simple Maintenance Tips for Liquid Ring Vacuum Pumps

Keeping a liquid ring vacuum pump like the 2BE1 running at the right pressure is not hard—but it does need regular care. Many users only call vacuum pump services when problems show up. In fact, good maintenance can prevent most issues before they start. Let’s look at this from a practical, easy-to-follow maintenance angle.

Why Low Pressure Happens in a Liquid Ring Vacuum Pump

Low vacuum pressure is one of the most common complaints. The good news? Most causes are simple.

Common reasons you should check first

Poor sealing water quality (dirty or too hot)

Wrong water flow rate—too much or too little

Air leaks in pipes, valves, or flanges

Worn internal parts, like seals or bearings

Understanding these basics already puts you ahead of many users.

How to Fix Low Pressure in a Vacuum Pump

Before shutting down the system or replacing parts, start with these steps.

Check the sealing water system

The liquid ring depends on water to form the vacuum.

Make sure the water is clean, cool, and stable

Check inlet filters and pipelines for blockage

Confirm the water temperature stays within design limits

Look for air leaks

Even small leaks can kill vacuum performance.

Inspect flanges, gaskets, and inspection ports

Listen for hissing sounds during operation

Use simple leak detection spray if needed

Inspect internal clearances

Over time, wear increases gaps inside the pump.

Check mechanical seals for leakage

Monitor bearing noise and temperature

If pressure drops slowly, internal wear is often the reason

Daily and Periodic Maintenance That Really Works

A clear maintenance routine makes a big difference.

Daily checks (5 minutes is enough)

Vacuum level stability

Noise and vibration

Water pressure and temperature

Monthly or scheduled maintenance

Clean or replace filters

Inspect seals and bearings

Flush the pump to prevent scale build-up

This is the core of any good Guía de mantenimiento de bombas de vacío de anillo líquido—simple actions, done on time.

When to Call Vacuum Pump Services

Not every issue needs a service team, but some do.

Call professional vacuum pump services when:

Vacuum pressure keeps dropping after basic checks

Water leaks appear at the shaft seal

Vibration increases suddenly

Proper Обслуживание жидкостно-кольцевых вакуумных насосов для длительной эксплуатации is about knowing when to act—and when to ask for help.

Final Thoughts: Maintenance Is Cheaper Than Repair

Liquid ring vacuum pumps are known for being tough and reliable. Still, they perform best with clean water, tight systems, and regular checks.
If you’ve dealt with low pressure before, what was the real cause in your case? Sharing experiences helps everyone run better systems.

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