Lobe Pumps

Technical data

Capacity:	Qmax. = 1371 l/min Qmax. = 2,29 l/rev
Max. speed	1200 rpm
Max. operating pressure:	PN10
Max. particle size:	3-15 mm particle sizes depend on the pump model
Max temperature:	100 °C
Rotor type:	lobe, made of AISI 316L
Casing and cover material:	316L stainless steel
Mechanical seal material:	SiC/SiC

TYPICAL APPLICATIONS

Industry	Example of application
Bakery products	Cakes, flavors, frostings, fruit fillings, fats and oils, sweeteners, yeast starters.
Beverage production	Beer, wort, yeast, soft drinks, fruit concentrates, fruit drinks.
Canned goods	Baby food, soups, stews, tomato or fruit puree, vegetables, diced vegetables, baby paps, puddings, jams, jellies, salad dressings, mayonnaise.
Confectionery products	Syrups, cream fillings, chocolate.
Cosmetics	Face creams and lotions, hair styling gels and fluids, essential oils, dyes and alcohols.
Dairy	Cream, milk, curd and whey, yogurts.
Meat production	Meat emulsions, ground meats, pet foods, animal fats.
Pharmaceutical industry	Pills masses, syrups, extracts, emulsions, suspensions.

LPX series pumps are hygienic rotary lobe pumps characterized by low shear forces and gentle pumping of both high and low viscosity products. The pumps in this series provide reliable performance with low noise, robust and gentle fluid transfer by using vast cavities that can accommodate large solids. These pumps are optimized for energy-efficient operation.

The design of the LPX series pumps features a special rotor-shaft mounting, ensuring accurate rotor positioning and a backlash-free connection. The unique gear housing design ensures no cross-contamination of the pumped product with gear oils. The pre-loaded tapered roller bearings do not require shims. As an option, they can be equipped with double mechanical seals for dry running. LPX series pumps provide good access to parts with easy maintenance and installation.

Tapflo Lobe pumps have a hygienic design confirmed by 3A certification and can be cleaned and sterilized on site (CIP/SIP). They are designed for pumping liquids in beverage and food production facilities, as well as comparable applications in the chemical, pharmaceutical and healthcare industries.

FEATURES & BENEFITS

Highest efficiency - energy conservation, low noise, low shear forces.
Versatile design - 4-directional gear housing mounting. Possibility of bi-directional flow, as well as horizontal or vertical mounting.
8 sizes - a range of models with a maximum capacity of up to 82 m³/h and a pressure of 10 bar, allowing the pump to be tailored to specific customer requirements.
Simple repair - easy to remove and install the pump body and cover.
Mechanical seal - single mechanical seal as standard. Double mechanical seals are also available as an option. Pumps with flush double mechanical seals can run continuously dry.
Design with spacious cavities - large spaces between lobes enable gentle pumping of liquids with large solids.
No cross-contamination - the gear oil is isolated from the pumped fluid zone due to the unique design of the gear housing.
Suitable for CIP/SIP - design that allows cleaning and sterilization on site.
Safety - the design of LPX pumps meets the requirements of hygienic standards 3-A and EHEDG, and is made of food contact materials approved by the FDA and EC Regulation 1935/2004.

BROCHURES

WORKING PRINCIPLE

The working principle of a lobe pump is to displace a certain amount of liquid from the suction area, by rotating the working elements (lobes), to the discharge area. The lobes are mounted on shafts, which are seated on bearings in an external synchronizer. Shafts equipped with gears, located inside the synchronizer, transfer the drive from the drive shaft to the intermediate shaft. The lobes are synchronized in such a way that they do not contact each other during operation.

As the lobes rotate, they increase the volume of the space between the teeth, causing a pressure drop on the suction port side (fig. 1). This causes fluid to flow into the pump body. The pumped liquid is transported inside the casing (fig. 2 and fig. 3) to the discharge side of the pump (Fig. 4). When the volume of the space between the lobes decreases, it causes an increase in pressure on the discharge side, and consequently the liquid is pushed out of the pump body.

DESIGN

1. Unique mounting system	accurate rotor positioning, facilitated maintenance.
2. Rotor	rotor mounting tightly isolated from the medium, lobes made of 316L stainless steel.
3. Optimised body design	flat cover for easy cleaning, sight glass for quick oil level reading.
4. Mounting feet	vertical and horizontal mounting options.
5. Gears	helical gears ensure smooth power transmission.
6. Bearings	heavy-duty tapered roller bearings, pre-loaded, no shimming required.
7. Simplified adjustment and synchronization	easy access to rotor clearance adjustment shims, easy to set and maintain rotor synchronization.

TYPES OF SEALS

Single mechanical seal	Mechanical seal faces provide long service life and high resistance to abrasive media. Available in FDA-approved SiC/SiC as standard.
Double concetric mechanical seal	Used with flushing fluid to cool, lubricate and flush out residue. Excellent for demanding applications. Available in FDA-approved SiC/SiC as standard.
Choice of elastomers for O-rings	Viton (FDA-certified), optional: EPDM.

OPTIONS & ACCESSORIES


Vertical execution for pump drainability and easier flow into the suction connection.	AISI 304L stainless steel baseplates as standard for all pump sizes

Lubrication tank for media crystallizing in contact with air.	Tank using thermosyphon effect for heavy-duty applications.

Mobile solutions individually tailored to the special needs of the client.	Standard Tapflo trolleys with fast delivery times and IP66 inverters.

IP66 inverters available in stock with fast delivery times.	Covers with heating jackets.

AVAILABLE SPARE PARTS KITS

CHARACTERISTIC CURVES

CERTIFICATES

CE Declaration of Conformity
Products identified as machines that have been CE marked must comply with the safety guidelines of the Machinery Directive 2006/42/EC.

FDA §21 CFR 177 materials
FDA (U.S. Food and Drug Administration) §21 CFR 177 lists polymers, e.g. rubber and plastic materials approved for equipment in contact with food products.

EC Regulation 1935/2004
It applies to all food contact materials, e.g. metals, plastics and rubber materials. The requirement of the regulation is that these materials are fully safe, made in accordance with GMP (Good Manufacturing Practice), marked with the glass and fork symbol and fully traceable throughout the production chain.

3-A sanitary certificate
Sanitary Standards 3-A are American standards related to the design and manufacture of equipment intended for food contact. Their goal is to protect consumers from the potential risk of food contamination by ensuring that all parts of the equipment are properly cleaned and sanitized to avoid bacterial contamination.

Pumped product sealing kit (standard and silicon carbide)

Double seal kit

Rotor replacement kit

O-ring kits (FKM or EPDM)