TRI-LOBE & TWIN WING LOBE PUMPS
Our Rotary Lobe pumps are used in a variety of industries including, pulp and paper, chemical, food, beverage, pharmaceutical, and biotechnology. They are popular in these diverse industries because they offer superb sanitary qualities, high efficiency, reliability, corrosion resistance, and good clean-in-place and sterilize-in-place (CIP/SIP) characteristics. All wetted parts are made of SS-316.
Rotary lobe pumps are non-contacting and have large pumping chambers, allowing them to handle solids such as cherries or olives without damage. They are also used to handle slurries, pastes, and a wide variety of other liquids. If wetted, they offer self-priming performance. A gentle pumping action minimizes product degradation. They also offer reversible flows and can operate dry for long periods of time. Flow is relatively independent of changes in process pressure, so output is constant and continuous.
SPECIFICATIONS:
MATERIAL OF CONSTRUCTION:
ADVANTAGES OF ROTARY LOBE PUMP:
Rotary lobe pumps are non-contacting and have large pumping chambers, allowing them to handle solids such as cherries or olives without damage. They are also used to handle slurries, pastes, and a wide variety of other liquids. If wetted, they offer self-priming performance. A gentle pumping action minimizes product degradation. They also offer reversible flows and can operate dry for long periods of time. Flow is relatively independent of changes in process pressure, so output is constant and continuous.
SPECIFICATIONS:
- Pumping capacity from 5 Lpm (0.3 m3/h) up to 8740 LPM (524 m3/h)
- Pressure up to 7 Bar
- Sizes from 1" to 8"
- Optional model also available with steam jacket
MATERIAL OF CONSTRUCTION:
- Pump chamber - SS-316
- Lobe - SS-316
- Top cover - SS-316
- Mechanical seal - SIC vs SIC with Viton elastomer
- Shaft - SS-316
- Casing - Cast iron
- Back cover - Cast iron
- Gears - EN-24 (AISI-4340) Alloy steel
ADVANTAGES OF ROTARY LOBE PUMP:
- Pass medium solids
- No metal-to-metal contact
- Superior Clean In Place / Sterilize In Place (CIP/SIP) capabilities
- Long term dry run (with lubrication to seals)
- Non-pulsating discharge
- Manufactured to a hygienically approved design
- Can self prime on low lifts with standard clearance rotors
- Can handle solids in suspension
- The gentle pumping action minimizes shear and crush damage to delicate liquids containing soft solids.

Rotary Lobe Pump Catalogue |
Working principle of lobe pumps :
Lobe pumps are similar to external gear pumps in the operation that fluid flows around the interior of the casing. Unlike external gear pumps, however, the lobes do not make contact. Lobe contact is prevented by external timing gears located in the gearbox. Pump shaft support bearings are located in the gearbox, and since the bearings are out of the pumped liquid, pressure is limited by bearing location and shaft deflection.
1. As the lobes come out of mesh, they create expanding volume on the inlet side of the pump. Liquid flows into the cavity and is trapped by the lobes as they rotate.
2. Liquid travels around the interior of the casing in the pockets between the lobes and the casing. It does not pass between the lobes.
3. Finally, the meshing of the lobes forces liquid through the outlet port under pressure.
Lobe pumps are frequently used in food applications because they handle solids without damaging the product. Particle size pumped can be much larger in lobe pumps than in other positive displacement pumps. Since the lobes do not make contact, and clearances are not as close as in other positive displacement pumps, this design handles low viscosity liquids with diminished performance. High-viscosity liquids require reduced speeds to achieve satisfactory performance. Reductions of 25% of rated speed and lower are common with high-viscosity liquids.
Common rotary lobe pump applications include, but are not limited to:
Some of the liquids which can be pumped by our lobe pumps are:
Lobe pumps are similar to external gear pumps in the operation that fluid flows around the interior of the casing. Unlike external gear pumps, however, the lobes do not make contact. Lobe contact is prevented by external timing gears located in the gearbox. Pump shaft support bearings are located in the gearbox, and since the bearings are out of the pumped liquid, pressure is limited by bearing location and shaft deflection.
1. As the lobes come out of mesh, they create expanding volume on the inlet side of the pump. Liquid flows into the cavity and is trapped by the lobes as they rotate.
2. Liquid travels around the interior of the casing in the pockets between the lobes and the casing. It does not pass between the lobes.
3. Finally, the meshing of the lobes forces liquid through the outlet port under pressure.
Lobe pumps are frequently used in food applications because they handle solids without damaging the product. Particle size pumped can be much larger in lobe pumps than in other positive displacement pumps. Since the lobes do not make contact, and clearances are not as close as in other positive displacement pumps, this design handles low viscosity liquids with diminished performance. High-viscosity liquids require reduced speeds to achieve satisfactory performance. Reductions of 25% of rated speed and lower are common with high-viscosity liquids.
Common rotary lobe pump applications include, but are not limited to:
- Polymers
- Paper coatings
- Soaps and surfactants
- Paints and dyes
- Rubber and adhesives
- Pharmaceuticals
- Food applications
- Cosmetics
Some of the liquids which can be pumped by our lobe pumps are:
- Alcohol
- Apple purée
- Apricots
- Baby food
- Batter
- Beans
- Beer
- Beetroot
- Biscuit Cream
- Blackcurrants
- Brine
- Broth
- Butter fat
- Caramel
- Castor Oil
- Cat food
- Cheese curd
- Cheese whey
- Cherries
- Chicken paste
- Chili con carne
- Chocolate
- Chutney
- Cockles
- Coconut oil
- Cod oil
- Coffee liquor
- Cordials
- Corn oil
- Corn syrup
- Cottage cheese
- Cotton seed oil
- Cranberry juice
- Cream
- Cream cheese
- Custard
- Dog food
- Dough
- Eggs - whole
- Egg yolk
- Essences
- Evaporated milk
- Fish
- Flavorings
- Fondants
- Fruit juice
- Fruit pulp
- Fruit - whole
- Fruit yogurt
- Gelatin
- Gherkins
- Glucose
- Glycerin
- Gooseberries
- Gravy
- Hand cream
- Honey
- Horseradish
- Ice cream
- Icings
- Iodine ointment
- Jams
- Jelly
- Ketchup
- Lard
- Liquid sugar
- Lotions
- Malt
- Maple syrup
- Margarine
- Marmalade
- Marshmallow
- Marzipan
- Mascara
- Mayonnaise
- Meat products
- Milk
- Mincemeat
- Molasses
- Mousse
- Mussels
- Mustard
- Nail polish
- Nail varnish
- Offal
- Olive oil
- Onions
- Palm oil
- Pastes
- Peanut butter
- Pectin
- Perfumes
- Piccalilli
- Pie fillings
- Pizza toppings
- Plasma
- Potato salad
- Preserves
- Purées
- Quinine
- Rice pudding
- Salad dressing
- Shrimps
- Soap
- Solvents
- Sorbitol syrup
- Soup
- Soya sauce
- Spirits
- Starches
- Stews
- Strawberries
- Sugar
- Syrup
- Tapioca
- Tea
- Tomato ketchup
- Tomato paste
- Tomato purée
- Toothpaste
- Tuna
- Vaseline
- Vegetables
- Vinegar
- Wort
- Yeast
- Yoghurt