1. Motor is drawing excessive power?
- Possible cause soft packing is too tight
Solution loosen the pressure gland
- Possible cause coupling alignment is incorrect
Solution readjust the coupling alignment
- Possible cause exhaust pipe diameter is too small
Solution adjust as specified in the installation section
- Possible cause service water amount is excessive
Solution adjust according to catalog value
2. There is leakage in the pump housing?
- Possible cause: gaskets are damaged or there's a hole.
Solution: replace the gaskets. Close if possible, otherwise replace the part.
3. Pump is not creating vacuum?
- Possible cause suction line is blocked
Solution clear the obstacles
- Possible cause fan blades are blocked with foreign material
Solution clean the fans
4. Pump is not reaching the desired vacuum level?
- Possible cause insufficient service water.
Solution adjust according to catalog value
- Possible cause service water temperature is too high
Solution provide cold water
- Possible cause pump rotation direction is reversed
Solution adjust according to the arrow direction on the pump label
- Possible cause limescale has formed on pump parts
Solution clean and reassemble
5. Bearings are overheating?
- Possible cause Incorrect planar adjustment
Solution readjust the coupling planar alignment
- Possible cause service water is hot
Solution provide cold water
6. Vacuum pump is operating with noise and vibration?
- Possible cause incorrect planar alignment of pump and motor (coupling alignment)
Solution readjust the coupling alignment
- Possible cause shaft, bearing or fan is broken
Solution replace broken parts
- Possible cause excessive service water flow
Solution adjust according to catalog value
- Possible cause pressure has reached cavitation limit.
Solution slightly open the anti-cavitation (discharge) valve
7. Vacuum pump is making noise?
- Possible cause foreign material has entered
Solution clean and remove
- Possible cause one or more fan blades are broken
Solution replace the damaged part
8. There is leakage from the pump packing area?
- Possible cause soft packing pressure gland is not properly adjusted
Solution tighten the pressure gland studs
- Possible cause packing is not properly installed
Solution check the soft packing and reinstall.
- Possible cause mechanical seal parts are worn
Solution replace worn parts
- Possible cause shaft is worn
Solution replace the shaft.
9. Vacuum pump rotation direction control
The pump rotation direction is indicated with an arrow on the pump label. (Clockwise when viewed from the motor side) Check if the pump is rotating in the arrow direction by pressing the switch for a short time. If you have removed the coupling guard for this operation, replace it immediately.
10. What is the most suitable pipe diameter for vacuum lines?
This value may vary depending on environmental conditions. 90° sharp bends and small pipe diameters for large capacity pumps are issues to be avoided. The most important rule is to never attach a pipe with a diameter smaller than the air inlet diameter to the pump. Small diameter pipes reduce efficiency, giving the same result as a person trying to breathe through a straw.
11. How can I maintain the vacuum pump?
- Use an oxalic acid solution to clean limescale and sediments that may form inside the pump and apply in 30-minute periods.
- Mechanical seals do not require maintenance.
- Bearings are capped on both sides and do not require lubrication until the bearing life ends.
- Hazardous substances (acidic, basic) that may remain in the pump should be emptied before the pump is disassembled, without prior contact.
- Hazardous substances remaining in the pump may cause interruptions in the pump fluid.
- If there is a filter in the system, do not remove the filter without stopping the pump.
12. How can we store the vacuum pump?
If the pump will not operate for a long time:
- Drain the water inside the pump by removing the plugs on the pump body
- Fill the pump with some protective oil and turn the pump shaft until all parts inside the pump are lubricated.
- Close the open parts of the pump.
- Store the pump in a closed, clean, and dry environment away from freezing danger.
- Protect the pump from vibration.
- Change the protective oil inside the pump every three months.
13. What is a Vacuum Pump, what does it do?
To understand the vacuum pump, one must first understand the word vacuum. Vacuum is an empty space without matter. The word is derived from the Latin adjective vacuus, which means "vacant" or "void". The vacuum approach refers to a region with a gas pressure much lower than atmospheric pressure. The meanings of vacuum in science and engineering may vary. Scientists try to create ideal environments that can occur in environments with zero gas. This is called absolute vacuum. Besides this, vacuum in a real environment will only be an imperfect vacuum. For this, the term partial vacuum is used. On the other hand, in engineering and applied physics, vacuum refers to any area where the pressure is significantly lower than atmospheric pressure. In Latin, the term vacuo is used to describe an object surrounded by emptiness.
A vacuum pump is a device that extracts gas molecules from a closed volume to leave a "partial vacuum", which is a scientific term. The job of a vacuum pump is to create a relative vacuum within a capacity. The first vacuum pump was invented by Otto von Guericke in 1650. Before him, a suction pump system dating back to ancient times had been developed.
Vacuum Pump is a mechanical device used to reduce the pressure of air or gases. In most cases, the pressure reduction process is accomplished by extracting air or gases from a container. Vacuum Pump is used in various applications, but most commonly in laboratory and industrial applications. Vacuum Pump, in most cases, is a mechanical device used to reduce the pressure of air or gases.
In most cases, the pressure reduction process is accomplished by extracting air or gases from a container. Vacuum Pump finds many uses in laboratory and industrial applications, such as pumping gases and liquids, accelerating chemical reactions, providing air pressure for air compressors, regulating voids inside glass tubes, preventing air breaks in wave level meters, and functioning like air compressors in photocopiers.
Pumps can generally be categorized according to three techniques
Positive displacement pumps use a mechanism to repeatedly expand a cavity, allow gases to flow from the chamber, close the cavity, and exhaust it to the atmosphere. Momentum transfer pumps, also called molecular pumps, use high-speed dense liquid jets or high-speed rotating blades to eject gas molecules out of the chamber. Entrapment pumps capture gases in solid or adsorbed state. This includes cryo pumps, getters, and ion pumps.
Positive displacement pumps are the most effective for low vacuums. The most common configuration used to achieve high vacuums is one or two positive displacement pumps along with momentum transfer pumps. In this configuration, the positive displacement pump serves two purposes. Since momentum transfer pumps cannot start pumping at atmospheric pressures, it first achieves a rough vacuum in the evacuated container before the momentum transfer pump is used to achieve high vacuum. Second, the positive displacement pump backs up the momentum transfer pump by evacuating the displaced molecules in the high vacuum pump to the low vacuum. Entrapment pumps can be added to reach very high vacuums, but they require periodic renewal of surfaces that hold air molecules or ions. Due to this requirement, at low and high vacuums their usable working times may be unacceptably short, so their use is restricted to ultra-high vacuums. Pumps also differ in details such as manufacturing tolerances, sealing material, pressure, flow, acceptance or non-acceptance of oil vapor, service intervals, reliability, tolerance to dust, tolerance to chemicals, tolerance to liquids, and vibration.
