INTRODUCTION TO BOOSTER PUMPS

  • Mechanical Vacuum Boosters are dry pumps that meet the majority of the ideal vacuum pump needs. They focus on positive displacement principle and are utilized to raise the performance water ring /oil ring /rotating vane /piston pumps and steam or water ejectors. They're in combination with any of the above pointed out pumps, to beat their limitations. Vacuum Variable Speed Booster Pumps offer very desirable characteristics which will make them the most affordable and power efficient option.

     

    The main advantages are:-

     

    (a) Could be integrated with any installed vacuum system, for example, Steam Ejectors, Water Ring Pumps, Oil Sealed Pumps, Water Ejectors, etc.

     

    (b) The vacuum booster is really a Dry Pump as it doesn't use any pumping fluid. It pumps vapor or gases with equal ease. Small quantities of condensed fluid may also be pumped.

     

    (c) Vacuum boosters are power efficient. Very frequently a mix of Vacuum Booster and appropriate backup pump leads to reduced power consumption per unit of pumping speed. They offer high pumping speeds even at low pressures.

     

    (d) Boosters boost the working vacuum from the process, generally very important for process

     

    Performance and efficiency. Vacuum Booster may be used more than a wide working pressure range, from 100 Torr lower to .001 Torr (mm of mercury), with an appropriate arrangement of backup pumps.

     

    (e) It's really low pump friction losses, hence requires relatively low power for top volumetric speeds. Typically, their speeds, at low vacuums are 20-30 occasions greater than corresponding vane pumps / ring pumps of equivalent power.

     

    (f) Utilization of electronic control devices, for example, Variable Frequency Control Drive let it modify vacuum boosters operating characteristics to adapt towards the operational needs from the prime vacuum pumps. Hence they may be easy built-into all existing pumping established to grow their

     

    Performance.

     

    (g) Vacuum boosters haven't any valves, rings, stuffing box, etc., therefore, don't demand regular maintenance.

     

    For instance, if your process is applying water ring Pump, the believed working vacuums could be from the order of approximately 670-710 mmHg gauge (90-50 mmHg abs.), largely concerning the temperature of water and pump design. Whenever a Booster is installed before the water ring pump, in series, the vacuum quantity of an order of 5-10 Torr can be simply achieved. Inside a Multi-Stage booster installation, vacuum quantity of an order of .5 Torr & better may be easily expected. Mechanical Boosters provide a totally dry pumping solution and don't increase any vapor load, unlike steam ejectors, and for that reason, don't require large inter stage condenses. At low vacuums, greater pumping speeds are needed to keep the through-put, because the specific volume increases with the rise in a vacuum. Vacuum boosters boost the pumping speeds by about 3-10 occasions based on the choice due to which can get greater process rates and thru-puts. The drawbacks of steam ejector system, for example, sensitivity to motive fluid pressures and discharge pressure are overcome easily through the Mechanical Boosters because the volumetric displacements/pumping speeds are insensitive towards the inlet & outlet working pressures.

     

    Typical Booster Installation

     

    (1) Evaporator (2) Gauge (3) Condenser (4) Mechanical Booster

     

    (5) backup Pump

     

    Booster Operation:

     

    Power Constraints restrict the entire differential pressures over the booster. This demands to guarantee the total differential pressure over the Booster mustn't exceed the rated limits. This is often ensured by the following means:-

     

    1.) Manual method:- Initially the forefront pump is started up before the needed decline in pressure is achieved there-following the booster is started up.

     

    2.) Auto method:- Installing of mechanical By-pass arrangement over the booster or hydro kinematic drive or Variable Frequency Drive (VFD). Within this arrangement, the booster and forefront pump could begin concurrently from the atmosphere.

     

    Benefits of using Electronic Variable Speed Device

     

    Electronic A.C Variable Frequency Control Drives are most preferred devices accustomed to regulate the

     

    Booster speed to complement the different load conditions from the process. These drives boost the efficiency from the Boosters and provide various advantages of the problem free operation.

     

    The Electronic Variable Frequency Control Drive is really a microprocessor based electronic drive that is specifically developed to satisfy the demands from the Booster letting it operate from atmosphere together with appropriate forefront pump. Conventionally, Boosters could begin once achieving forefront vacuum in the plethora of 30 - 100 Torr, because they are not suggested for direct discharge into the atmosphere. Utilization of Pressure Switch, Hydro kinematic drive bypass valves is essential to avoid the overloading from the Booster. Though installing Electronic Variable Frequency Control Drive all of the fliers and business cards could be bypassed because the drive is developed to regulate the Booster speed instantly, maintaining your strain on motor within allowable limits. This enables the Booster to begin concurrently with a backup pump. Once the backup-pump and Booster are begun the drive cuts down on the Booster speed towards the pre-set levels and because the vacuum is produced the Booster speed accumulates, reaching the ultimate pre-set speed, giving most optimum performance within the entire range. Since all of the parameters are often programmable, it's possible to adjust the booster pumping speeds to complement the machine needs easily and rapidly. The drive limits the present towards the motor and safeguards the motor against over current, under current, electronic thermal, overheat ground problems. i.e. protects the motor against all possible problems.