We have the answers to the most commonly asked questions about vacuum pumps and blowers.

Frequently Asked Questions

These are the questions we get asked the most, so if you’re having an issue with a vacuum pump or blower, or just have a question about maintenance you should find the answer here.

Can I use any oil in my vacuum pump?

No, it’s essential that you only use the recommended oil in your vacuum pump, it acts as a blotter and absorbs all of the moisture and non-condensables. As the oil becomes contaminated, the efficiency of the pump will be dramatically reduced. Regularly replacing the oil in the pump will ensure that it operates at peak efficiency and will prolong its life. If the oil turns white during operation it has water in it and must be replaced immediately.

How do you maintain a vacuum pump?

There are things you can do yourself to check that your pump is working correctly, and replace any parts as necessary. If you notice anything that you think needs further inspection get in touch.

  • Check pump oil level and condition, and check for oil leaks
  • Check oil and exhaust filters and replace if necessary
  • Check the oil filter for any leaks
  • Clean dirt trap
  • Check pump temperature at sight glass area
  • Visually inspect all gaskets
  • Check drive belts for wear and check tension
  • Check temperature reading at thermal valve
  • Check radiator cleanliness/airflow
  • Visually check and record cleanliness of area where pump is used
  • How can I improve the performance of my pump?

    Carry out regular checks, change the oil regularly, and take time to understand your vacuum pumps and how they operate. If you notice any changes to pressure, output or excessive heat or noise turn your vacuum pump off and give us a call. Having a maintenance plan in place will help to keep things running smoothly too.

    Why is my vacuum pump vibrating?

    Possible causes for Vacuum pump vibrations are; misalignment of the pump and drive shaft, rotor imbalance, bent shafts, and damaged vanes. Vibration sources can also come from system-related issues such as worn or damaged bearings, inadequate piping supports and other sources of excessive nozzle loading. If you think your pump has one or more of these issues switch it off to prevent further damage and get in touch.

    Why is my vacuum pump noisy?

    A noisy vacuum pump may be close to failure due to ageing and accumulated wear and tear. A specific part in the pump may be failing. An increase in noise is generally a sign that a pump requires maintenance and cleaning. Parts such as diaphragms, filters and seals are easily replaced, any bearing, motor or air noises may indicate that an expert is needed.

    Why is my vacuum pump overheating?

    Factors that cause a vacuum pump to overheat include having a damaged motor, incompatible pump applications or poor ventilation. If your pump is constantly overheating it may indicate a malfunction.

    First check the pump ventilation openings. If they are blocked or are too close to another object, clean and resite the pump to see if that solves the problem. If not, give us a call.
    Why is my pump not reaching ultimate pressure?

    If your vacuum pump isn’t reaching the required pressure, or if it takes longer than normal to reach maximum pressure, the vacuum system may be leaky or dirty, the pump may be damaged or the vacuum gauge might be defective. Cleaning and replacing and damaged parts should sort any minor issues, but if your pump is still not reaching the required pressure call in an engineer.

    Why is my pump speed too low?

    Generally this is due to blockages or flow restrictions at the inlet or outlet. If there are no blockages, your pump might have a damaged or weak motor or capacitor.

    How do I stop my pump leaking oil?

    The most common causes of oil leaks are worn or damaged seals or gaskets, or the oil level being too high. If replacing any damaged parts doesn’t solve your problem give us a call.
    Why does the overload keep tripping?

    There are several reasons that a vacuum pump can cause the overload to trip including an electrical fault, a seized pump or blocked exhaust causing the pump to overload.

    What services do you offer?

    Our services include;

    • On-site minor & major pump servicing
    • Off-site minor & major pump servicing
    • Vacuum pump refurbishment & rebuilds
    • Rapid turnaround or lead time for all pump servicing
    • Pump transport available to and from our facility
    • Free loan pump to keep you fully operational
    • In the event of a breakdown, we offer a full repair service

    What areas do you cover?

    We cover the whole of mainland UK, from Cornwall to the Highlands, the east coast of England to west Wales.

    What sectors do you work with?

    Wherever vacuum pumps are used, we can support them. From food manufacturing, research and developemnt, universities, industrial heating and air conditioning units, furnaces, the automotive and aerospace industries, construction, and chemical and pharmaceutical industries.

    We Specialise in:

    Refrigeration and Air Conditioning

    Vacuum Metalization

    Vacuum-pressure impregnation systems

    Vacuum drying plants

    Vacuum pumping stations

    Transformer drying and filling systems


    Experienced with all Vacuum Pump designs and manufacturers, across various types of processes. We specialise in:

    All Leybold Pumps including the screwline range
    All Edwards models
    All Busch models including the Cobra range
    All Stokes models
    All Ulvac models
    All Aerzen Blowers, Alcatel, Pfeiffer, Becker and many more

    Sectors we work with

    Food and Drink



    Chemicals and Plastics







    Brands we work with