Rotary Lobe Pumps

  • Serving Industrial, Municipal & Sanitary Industries

    Pumping fluids that are highly viscous, abrasive, laden with solids or all of these is the daily task for the Megator Lobe Pump.

    Due to a number of carefully engineered features, the Megator Rotary Lobe Pump manages such a task whilst ensuring a low life cycle cost.

    The gentle action of the two interacting rotors creates fluid movement through the pump, with minimal damage to suspended particles. Various types of rotor materials can be used, combined with a wide range of materials for all other wetted parts, resistance to wear and corrosion are obtained.

    The special design of the Megator Lobe pump allows dry running, as the standard mechanical/lip - seal system is constantly lubricated. The same lubrication acts as a seal detector, allowing the user to react swiftly in case of any leaks occurring.

    Typical fluids handled with the Megator Lobe Pump are:

    Sludge with high dry-matter content, mud slurries, chemicals, centrifuge feed fluid, meat offal, cement slurry, gypsum, sauces with vegetables, marmalade etc.

    • Capacity up to 375m3/hr
    • Solids up to 61mm
    • Differential pressure up to 30 bar
    • Viscosity up to 1.000.000cp
    • Temperatures up to 450°C
    • Seal system: lip seals, double mechanical seals, single mechanical seals, stuffing box and a combination of these seal types.
    • Casing: FCD45, bronze, SUS316, SUS316L, Hastelloy B, Titanium, Monel, etc.
    • Rotors: Elastomer compounds, SUS316, bronze, Teflon, PVDF, MC nylon, Hastelloy B, etc.

    How a rotary lobe pump works.

  • Industrial Rotary Lobe Pumps

    Applications include Oil, Wastewater, Sludge, Chemicals, Asphalt, Excretions, Paints, and Polymers.

    Model Inlet/ Outlet Dia. Pressure
    bar g
    Flow (litres/min)
    Vane 960rpm 725rpm 580rpm 480rpm 380rpm Per1rev
    MLP-L20 25 10 2 62 47 38 31 25 64cc
    MLP-L25 25 15 2 82 62 50 41 33 85cc
    MLP-L32 32 15 2 105 79 64 53 42 109cc
    MLP-L40 40 30 2 214 161 129 107 85 222cc
    MLP-L50 50 30 2 300 227 181 150 119 312cc
    MLP-L65 65 30 2 400 302 242 200 158 416cc
    MLP-L80 80 30 2   519 415 343 272 715cc
    MLP-L100 100 30 2   728 575 475 377 990cc
    MLP-L120 125 30 2   1037 830 687 544 1430cc
    MLP-L125 125 30 2   1506 1205 997 790 2077cc
    MLP-L150 150 30 2   2034 1627 1347 1066 2805cc
    MLP-L200 200 30 2     2978 2466 1953 5137cc
    MLP-L250 250 30 2     4172 3453 2733 7192cc
  • Sanitary Rotary Lobe Pumps

    Applications include Dairy, Bakery, Meats, Canned Foods, Beverages, Candy, Flavourings, Dressings and Cosmetics.

    Sanitary Pumps (Male/Ferrule)

    Model Inlet/ Outlet Dia. Pressure
    bar g
    Flow (litres/min)
    Vane 960rpm 725rpm 580rpm 480rpm 380rpm Per1rev
    MLP-1S 23 15 2 92 69 56 46 37 95cc
    MLP-1.5S 35.7 15 2 135 102 82 68 54 140cc
    MLP-1.5SL 35.7 30 2 279 211 169 140 111 290cc
    MLP-2S 47.8 30 2 356 269 215 178 141 370cc
    MLP-2SL 47.8 30 2   428 343 284 225 590cc
    MLP-2.5SL 60.5 30 2   515 412 341 270 710cc
    MLP-3S 72.3 30 2   638 511 423 335 880cc
  • FAQ's

    What precautions should be taken when handling abrasive slurries?
    Select a large pump, running at low speed. The circumferential speed of the rotor is very important, to minimize wear between rotor and casing use a hardened casing to create the best possible wear resistance, together with rotor materials that can withstand the abrasion.

    What precautions should be taken when handling high viscosity fluids?
    Make sure that the pump will be filled up. This is achieved by selecting a pump with large ports, which allows the fluid to fill the pump chambers. Running the pump at low speed gives the fluid enough time to enter the pump chambers. If a satisfactory degree of filling can not be obtained by gravity or pressuring the fluid source tank, an in-feed screw may be required. Install the pump as close as possible to the fluid source, avoiding unnecessary restrictions. If these issues are not addressed, the pump may cavitate which will increase wear and may inflict damage to the pump.

    Can the pump withstand dry running?
    The lobe pump may dry run, as there is no physical contact between rotors and casing. The seal chamber is filled with a lubricant, that will not let the seals dry run, but keep them lubricated at all times. Further to this the lubricant will transmit heat generated away from the seals.

    How can I minimize the pressure drop?
    Use long elbows, and large diameter pipes. Use as few elbows as possible. In certain cases lubricants can be added to the fluid, thereby decreasing the pressure drop. One should remember that the pipe system is a one-time cost - the increased running cost caused by high pressure is a continuous cost through the complete life span of the pump.