We take pleasure to introduce 'JOYAM' Engineers and Consultants Pvt. Ltd. as one of the leading manufacturer of all types of vacuum pump i.e. Single stage watering vacuum pump, two stage watering vacuum pump, oil seal rotary vacuum pump , mechanical booster systems, Recirculation systems ,steam jet ejector systems, twin lobe roots blower, Dry Vacuum Pump.

We would like to inform all our valued clients, that with your continual support and trust, we are entering in to 25th year.

We have now shifted our manufacturing to a bigger and spacious place, with complete new machinery of latest technology to manufacture and test our vacuum products

Our future plan is to move to a bigger place in couple of years, as we have now widened our range of vacuum products.

We have made lots of improvement on our technology and quality of our products by offering a better design product, which improves the life of products due to selection of right type of material for the Indian ambient condition

Joyam Engineers & Consultants Pvt. Ltd

81,Tribhuvan Estate
Road No. 11,Opp.Water Tank
Kathwada G.I.D.C
Gujarat, India. 
Head Office
704-B, Mahalay, 
Opp. Hotel President, 
Near Swastik Cross Roads, 
Gujarat, India.
O : +91 79 26569533
F : +91 79 26562777



JOYAM ENGINEERS & CONSULTANTS PVT LTD. Offers its vacuum solutions in the various process, chemical and Pharma industries based on the requirement. It extends the various services which includes.

1.) Vacuum pump technical selection

2.) Process Technical

3.) Mechanical vacuum booster selection

4.) Vacuum requirement in various industries.

Vacuum is a word meaning emptiness derived from the various definitions and concepts,

Basically there are five types of vacuum ranges to work

1.) Low vacuum

2.) Medium vacuum

3.) High vacuum

4.) Ultrahigh vacuum

5.) Extremely high or molecular vacuum

JOYAM deals in the range of Low & Medium range of vacuum with its various positive displacement and vane principle pumps.

Positive displacement pumps include the Water ring Vacuum Pumps, Boosters and Screw type pumps.

Vane principle includes the Oil Ring type and Oil flooded vacuum pumps.

Note: The following procedure can be used to select a pump model that meets process requirement or to rate an existing pump for a particular application. The calculations for selection are meant to be used in preliminary evaluation& the final results should be verified with the pump manufacturer.

Vacuum Pump Technical Selection

  • Vacuum requirement in any industry is based on various parameters, this parameters might be related to process inside and outside conditions, there are many variables effecting the exact vacuum pump selection, a small collection of questions are presented here for the same.

Direct influences

  • Volume of the vessel in which vacuum is to be done
  • The time to achieve the required vacuum (i.e. Evacuation time)
  • Process temperature.
  • Ambient temperature where the vacuum pump is to be mounted.
  • Type of Water cooling arrangement provided in the process.
  • Leakages occurring in the process.
  • Capital and maintenance cost of the Vacuum Pump.

Indirect influences.

  • Vapours to be handled by the vacuum pump
  • PH of water being circulated as sealing water in the vacuum pump.
  • Compatibility of Material of construction of vacuum pump as per the process.
  • Condensing temperature of the incoming suction vapours.
  • Suction vapour pressure.(Ideally should be atmospheric)
  • Why vacuum pump (i.e. the replacement of ejector system for saving the steam consumption)


Factors that Decrease the life of Vacuum Pump

1) Cavitation due to Vapor Bubbles :

  • Reasons
  • At atmospheric pressure, water boils at 212F, while at a lower pressure (vacuum) it will boil at a lower temperature, {i.e., at 52 mm Hg(27.87” Hg vacuum), water boils at {102 F}. Conversely, as the pressure is increased, water will not boil until it reaches a higher temperature, like in a pressure cooker
  • The damage is caused when the vapor bubbles and collapseand a high velocity of water tears away the metallic surfaces of the pump internals.
  • An increase in pressure or a decrease in temperature in the isolated pockets of the vacuum pump induces cavitation.
  • Once the vaporization has taken place, a pressure increase is expected, while passing through the pump as the gas is compressed upto the discharge of the pump.
  • Solution

  • Check Service liquid boiling point in atmospheric pressure and under vacuum.
  • The temperature of the sealing liquid must remain below the saturation point corresponding to the inlet pressurefor avoiding the cavitation.
  • In Short the service liquid must be cold enough to avoid vaporization at the lowest anticipated pump operating pressure.

Note: Vacuum Pump gladly accepts the liquid with suitable temperature range for maintaining a healthy vacuum (i.e. within prescribed range).

2) Cavitation due to High Pressure Liquid Inlet:(Mostly In Impeller)

  • Reason

  • Impeller is mounted eccentrically in Casing and liquid enters from the Lower Vertex of the Impeller.
  • If this inlet liquid pressure is higher it causes flashing on the Impeller Inside. So It is also the minor reason for Cavitation.
  • High pressure liquid flashed on impeller blades directly causes Cavitations (i.e. The Formation of Water Bubbles).


  • Check the Instruction Given in the Datasheetfor design pressure while operating of Vacuum Pump.
  • Inlet Pressure should be same as specified in the Technical Datasheet of respective vacuum pump.
  • The quantity of sealing liquid supplied should be as prescribed in technical datasheet.

Cavitation causes checklist:

1.) Is the Sealing Liquid Inlet Temperature in the vacuum pump below the marked limitation for cavitation free operation.

2.) Check whether Sealing Liquid Inlet Temperature of the Vacuum Pump Low enough to support the requiredVacuum?

3.) Flow rate of sealing Liquid entering the vacuum pump should be maintained at an optimum level.

4.) If Rattling noise found in Vacuum Pump operate vacuum relief valve to avoid cavitation as like vacuum relief valve.

5.) Check the piping leakages into the system for gauging of excess air entering.

6.) Amount of sealing Liquidtemperature achieved at the outlet of the heat exchanger


Shaft Breakage


  • Make sure the pump is drained when the vacuum pump is switchedoff, if the sealing liquid remains in the vacuum pump, it can cause a generation of high torque when the pump is restarted,and this can adversely effect the impeller blades and shaft.

  • Check the quantity of inlet liquidin the vacuum pump it must not exceed the desired limits.

  • Make sure the foundations are correct and strong enough to avoid vibration.

  • Inlet liquid pressure should be optimum for avoiding the cavitation.

Heating of Bearing: A Normal Phenomenon


  • In any process during the operation of vacuum pump, heating of bearing can be found due to lack of timely lubrication.

  • It is also found that sometimes the process lines are in tension when connected to the suction and discharge of vacuum pump. This can cause a slight misalignment when mounted on the base, resulting in the heating of bearing.

  • Higher temperature vapors greater than prescribed limits can cause the water ring to heat up under high vacuum and this can cause heating of bearings ends.

  • Normally due to closed ends on non-drive side of the pump, the same part might get heated up with a difference of 5oC.


  • Proper alignment should be done while mounting the vacuum pump on base frame , also the process lines should be accordingly centred to the suction and discharge of vacuum pump.

  • Sealing liquid temperature should be maintained around 30 to 35 degrees to avoid excess heat generation during the churning of liquid in the vacuum pump.

Back Pressure in Discharge Line Causes Cavitation in Impeller


  • Discharge of Joyamliquid Ring Vacuum Pump should be at Atmospheric Pressure and atthespecified vertical length of Discharge Line as instructed in the manual.

  • When Length of Dischargeline increases there is a constant pressure coming in backward direction which induces the pressure on the liquid ring and hence reduces the vacuum.

  • Due to backpressure there are chances of cavitation due to increase in temperature as well as reduction of vacuum.


  • While installing Liquid Ring Vacuum Pump Discharge Line Vertical Length Should Be less than 1.5 feet in all the cases for Single Stage, Two Stage and High Capacity low liquid ring vacuum pump.

  • While for Monoblock vacuum pump the discharge line should not rise above 4”.

  • Installation of the vacuum pump as per the standard instructions in the manual.

  • Suction and discharge line should not be in tension.

  • For more safety Pressure Gauge should be attached tocheck the Pressure in Discharge Line which should not be higher than atmospheric pressure.
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