Wendelkolben® Pumps– Helical twisted roots pumps –

Your problem:media of highest viscosityshear sensitive medialiquids with solid bits

Our solution:energy savingpulsationfreesmoothquiet run

Postfach 40 Hauptstraße 12D-95479 Gefrees D-95482 GefreesInternet: www.herold-gefrees.de

Phone +49 9254 970-0Fax +49 9254 970-40e-mail herold.gefrees@t-online.de

Medium: MassecuiteTemperature: appr. 55 °C / 131 °F Density: 1,45 t/m3 / 91 lbs/ft3

Dry matter: 91 %Viscosity: 10.000 mPasType: 01.035 VYear: 1997Rpm pump: 145 l/minVol. delivery: 27 m3/h / 954 ft.3/h Pressure: 6,0 bar / 85 psiDrive: Geared motor: 18,5 hp / 13,5 kW

Medium: After product magmaTemperature: appr. 65 °C / 149 °F Density: 1,4 t/m3 / 87 lbs/ft3

Dry matter: 95 %Type: 01.050 VYear: 1997Rpm pump: 110 – 160 l/minVol. delivery: 32 – 46 m3/h / 1130 – 1625 ft3/hPressure: 8,0 bar / 118 psi Drive: Geared motor: 41 hp / 30 kW

Medium: Raw sugar run offTemperature: appr. 55 °C / 131 °F Density: 1,4 t/m3 / 87 lbs/ft3

Dry matter: 84 %Type: 01.050Year: 1993Rpm pump: 110 – 250 l/minVol. delivery: 30 – 67 m3/h / 1060 – 2366 ft3/hPressure: 6,5 bar / 92 psiDrive: Geared motor with frequency changer: 41 hp / 30 kWRemarks:• Small overall pump dimensions, however high delivery rate.• Exceptional smooth and quiet run.• Tolerant against short periods of running dry.

Medium: Soft cheese-curdTemperature: appr. 8 °C / 46 °FDensity: 1,1 t/m3 / 69 lbs/ft3

Type: 06.035Year: 1993Rpm pump: 264 - 400 1/minVol. delivery: 50 – 80 m3/h / 1766 – 2825 ft3/hPressure: 2,5 bar / 36 psiDrive: Geared motor: 10,5 hp / 7,5 kWRemarks:• Easy and gentle delivery of medium

(remarkable less fines in the whey).

Medium: Gingerbread doughDensity: 1,2 t/m3 / 75 lbs/ft3

Type: 06.010Year: 1996Rpm pump: 30 - 150 1/minVol. delivery: 2 – 9 m3/h / 70 – 318 ft3/hPressure: appr. 12 bar / 170 psiDrive: Geared motor with frequency changer: 10,5 hp / 7,5 kWRemarks:• Special design with end support for an operating pressure

of up to 15 bar / 213 psi.• The lid can be removed without demounting the seal and end support.

authorized dealer

Medium: After product magmaTemperature: appr. 50°C/122°FDensity: 1,4 t/m3 / 87 lbs/ft3

Dry matter: 89-92 %Viscosity: 320.000 mPasType: 01.050 VYear: 2001Rpm pump: 133 - 145 1/minVol. delivery: 40 m3/h / 1413 ft3/hPressure: 5,0 bar / 71 psiDrive: 30 hp / 22 kWRemarks:• Ideal 90° position of inlet and discharge

when pumping high viscosity medium.• Easy and space saving installation• Sturdy frame construction

Both of the sectional drawings show the elementary and rugged construction of the Wendelkolben® Pump - helical twisted roots pump.

Model number 0.1 with mechanical seals and quench

Model number 0.6 with mechanical seals

Wendelkolben® Pumps – helical twisted roots pumps –were developed by Herold & Co. GmbH, Gefrees,

Germany, and are patented

The Wendelkolben® Pumps, developed and patented by Herold & Co. GmbH, produce a pulsation free flow, as both end faces of each Wendelkolben® -rotor are helical twisted against each other by 90°. They rotate with microscopic clearance and are synchronized by ground, surface hardened helical timing gears.

The advantages of those helical twisted Wendelkolben® -rotors:

• continuous flow with absolute equal volume

• pulsation free pumping principle

• smooth and gentle treatment of the medium to be pumped

• exceptional low noise level

• tremendous reduction in power consumption

Schematic of the pumping principle

1. Due to rotation of the helical twisted rotors a vacuum is created, which draws the liquids without interruption into the pumpingchamber.

2. By further rotation the liquids are locked in between the rotors and the rotor housing,3. transported4. and discharged without pulsation.

When changing the direction of rotation the flow is reversed.

The pulsation-free flow is achieved through the patented shape of the suction and discharge end of the pumphousing. The displacement chamber`s sealing line has a configuration resembling two triangles which are oppositely positioned, standing180° to each other. This positioning is vital in achieving the pulsation-free flow.

Dental paste Canned mushrooms

Applications

Sugar and starch industryWhite sugar, raw sugar, after product, crystal suspensions, sucrose solutions, massecuites, molasses, thick juices, dextrose anhydride, dextrose monohydrate

Pulp and paper industryPulp, starch, coating

Bake, pastry and pie productsYeast, leaven and biscuit dough, edible fat and oil, chocolate and sugar-icing, fruit, truffle and nut fillings, honey, syrupand cream, noodle and spaghetti dough, gingerbread dough and other such dough

Sweets and candiesJelly, gelatine, ice cream, chocolate, cacao butter, peanut butter, butter fat, starch gum

Milk and cheese productsCream, soft cheese-curd, butter milk, yogurt, curd, ice cream, butter, spreaded cheese, soft cheese, raclette cheese, processed cheese, cottage cheese, whey curd

Liquor and beverage industryMash, yeast, condiments, fruit purees, fruit juice concentrates

Meat and sausage productsFats, meat salad, boiled sausage, raw sausage, pasty, pâte, liver sausage, spread sausage with and without solid bits

Canned foodKetchup, tomato paste, mustard, emulsified cream and gravy, marinade, salad dressing, jelly, jam, marmelade, plum-jam,desserts, stewed fruit, pulp, syrup, soup, pap, stew, baby food, mash, pudding, mushrooms, cranberries, sauerkraut, redcabbage and other processed fruits and vegetables.

How do Wendelkolben® Pumps compare to other pumps?Here’s what our customer say …

Sugar and starch industryWhen pumping media of highest viscosity, such as after product, raw sugar, white sugar and sugar solution, there was nodamage of the sugar crystal structure. There was no impurity of the medium by foreign matters, as Wendelkolben® rotorsand pump housing are made of extremely wear-resistant material. The one-sided bearing support makes for very maintenance, plus, for intermittent operation, the pump housing has connectors for steam cleaning.

Cheese and dairy industryWendelkolben® Pumps gave no visual dust effect and change of consistency even when pumping soft cheese curd. We sawtotally germ-free delivery of cottage cheese due to the sterile axial seal ring, which was developed and patented by Herold.And we saw no effervescence when pumping cream and skimmed cream. We can pump, portion and bag soft cheese withonly one Wendelkolben® Pump.

ChocolatesWendelkolben® Pumps pump a constant volume of chocolates with solid bits, such as raisin-nut-chocolate mixtures, withshowing no visual signs of being crushed or separated after the pumping process.

Bake, pastry and pie productionWith additional counter bearings mounted in the lid of the pump housing, a constant pressure of 15 bar (213 psi) can bekept when pumping heavy dough and gingerbread with a high amount of solid bits.

Canned food industryWe pump cooked sauerkraut and red cabbage with up to 80% dry matter content and a temperature of 95 °C (203 °F) overa longer pipeline system directly into the can, without volume deviation or clogging.They deliver shear-sensitive products, such as mushrooms, cranberries and other fruits without any visual damage.

Wendelkolben® pumps give operators the chance to keep up with the always-increasing demand for higher quality productwhile achieving a higher output with less energy consumption, (i.e. optimizing the production process).

400

300

200

100

01.000 5.000 10.000 20.000 40.000 60.000 80.000 100.000 150.000 200.000 250.000

.003/.005

.010/.014/.028/.035

.050

.075/.100rp

m

Viscosity in mPas / cP

Type Vol. delivery m3/h Pressure Rpm max. Flangemin. max. max. bar 1/min ID in mm inch

01.003 1 7 9 400 50 1.9701.003 V 1 7 9 400 80/45° 3.15/45°01.005 2 12 9 400 50 1.9701.005 V 2 12 9 400 80/45° 3.15/45°01.010 4 24 8 400 100 3.9401.010 V 4 24 8 400 150/45° 5.91/45°01.014 6 34 7 400 100 3.9401.014 V 6 34 7 400 150/45° 5.91/45°01.028 12 68 8 400 125 4.9201.028 V 12 68 8 400 200/45° 7.87/45°01.035 15 84 7 400 125 4.9201.035 V 15 84 7 400 200/45° 7.87/45°01.050 18 105 8 350 150 5.9101.050 V 18 105 8 350 250/45° 9.84/45°01.075 27 135 7 300 200 7.8701.075 V 27 135 7 300 300/45° 11.81/45°01.100 36 180 6 300 200 7.8701.100 V 36 180 6 300 300/45° 11.81/45°

Maximum rpm in relation to viscosity of the media.

Type Vol. delivery m3/h Pressure Rpm max. Milkpipe threadmin. max. max. bar 1/min ID in mm inch

06.003 1 7 9 400 50 1.9706.003 V 1 7 9 400 80/45° 3.15/45°06.005 2 12 9 400 50 1.9706.005 V 2 12 9 400 80/45° 3.15/45°06.010 4 24 8 400 80 1.9706.014 6 34 7 400 80 1.9706.028 12 68 8 400 100 3.9406.035 15 84 7 400 100 3.94

All parts which are in touch with the media are in stainless steel.

Drive housing in grey cast.

Extras on request.

1m3 (1000 l) =̂ 264 US gal =̂ 220 Imp gal =̂ 35.31 ft3 1 bar =̂ 14.2 psi

All parts which are in touch with the media are in ni-resist or stainless steel.

Size code: Example 01.005 = 0,5 liter / 0.13 US gal / 0.11 Imp gal / vol. delivery / rpm01.100 = 10,0 liter / 2.64 US gal / 2.20 Imp gal / vol. delivery / rpm06.028 = 2,8 liter / 0.74 US gal / 0.62 Imp gal / vol. delivery / rpm

Outstanding features of the Wendelkolben®pumps:• revolving rotors do not touch each other or casing• minimum wear• tolerant of short periods of running dry• option of switching pumping direction• volumetric delivery directly proportional to rpm• continuous flow• wide range of applications• pumps media of highest viscosity • pumps liquids mixed with solids• gentle mixing effect on medium• high efficiency

Advantages of the Wendelkolben® helical twisted rotors:• pulsation-free operation• gentle positive displacement of medium• continuous flow• reduced power consumption• no vibrations on pipeline system• minimum noise level

Design advantages:• sturdy, yet rugged construction• easy cleaning• designed for ease of inspection and maintenance• various design seals available• modular construction• if required, construction can be altered to provide

a higher pressure and/or a higher temperature

• In comparison to almost all ordinary positive displacement pumps, which have a “portion-wise“ pumping action at the suction and discharge end, the two counter-turning Wendelkolben® -helical twisted rotors- create a pulsation-free,absolutely smooth and continuous flow of medium.

• The Wendelkolben® -helical twisted rotors- improve the quality of the pumping process. The gentle way of transport-ing a medium is ideal for its homogeneity. It creates a very good, but at the same time very gentle and continuous,mixing effect. Due to its maximized delivery surface and displacement volume, sugar crystals will not get triturated.Even media of highest viscosity can be pumped without problems. Another notable result of the configuration of therotors is the tremendous reduction in power consumption.

• The revolving Wendelkolben® -helical twisted rotors- do not touch each other or the pump housing. The material of therotors and the pump housing have a high degree of hardness. This is a guarantee for the purity of the medium to be pumped, as no foreign matter gets mixed in between sugar crystals or other such media.

• The exceptionally quiet run and pulsation-free operation increases the service life of the pumps, drive units, valves and seals. It also reduces the load on the complete pipeline system and its mounting brackets. Roaring sounds are eliminated.

• The pumps are designed for ease of inspection. In the case of a power failure causing the pumped medium to solidify,the Wendelkolben pumps® -helical twisted roots pumps- can be cleared and returned to operation in shortest time. The lid of the pump housing can be removed and even the pump housing can be taken off completely, providing easy access for cleaning, without demounting the gear box, drive unit or pipes.

Components

Materials in contact with the medium InstallationNi-resist Standard: horizontal Stainless steel On request: vertical

45° up or 45° down90° up or 90° down

Finish O-ringsPainted NBR

VitonEPDM(other materials on request)

Sizes Drive9 sizes Three-phase-geared motorPressure up to 9 bar/128 psi Mechanical variable speed geared motor(higher pressure on request) Standard clutchVol. delivery up to 180 m3/h Safety clutchRpm up to 400 l/min Timing-belt-drive

AdaptersFlangeMilkpipe thread

AccessoryQuench-tankHeating/Cooling plateBasic frameHeight adjustable framePortable frame45° frameCurrent reverser

Seals

Axial seal ring in standard design

This mechanical seal is strainfree, independent of the direction of rotation, and has enclosed spring suspension. Onour standard version the O-rings are made of Viton and thefitting mechanical seals are made of silicone carbide. Aquench system with zero pressure can be ordered as anaccessory.

Mechanical hard metal seals with quench

For the sugar industry special mechanical seals were developed which are strainfree, independent of direction ofrotation, and are spring-suspended outside of the medium.On our standard version the O-rings are made of Viton andthe fitting mechanical seals are made of tungsten carbide.The mechanical seals are lubricated and cooled by a quenchsystem at zero pressure. The secondary seal is also a mecha-nical seal.

Axial seal ring for sterile processing

This mechanical seal, developed and patented by Herold, isstrainfree, independent of direction of rotation, and is springsuspended outside of the medium. There is no gap aroundthe mechanical seal or the O-ring. This design is ideal forsterile processing. A quench system with zero pressure canbe ordered as an accessory.

Stuffing box

A lantern ring, fitted in between four packing rings, providesflushing and lubrication to the stuffing box. State of the artpacking material is used to produce even pressure around thecircumference of the shaft, minimizing wear. For most appli-cations the stuffing box can be connected to an externalquench system. When pumping abrasives or crystalline pro-ducts as found in the paper and sugar industries the lanternring should be pressurized slightly above pump dischargepressure.

Elastomer seal ring

The seal ring is made of PTFE and has three sealing lips. Itis a very space-saving design. Due to its reinforced lip designand the ceramic coated running surface, its application isvery versatile.

Optional is a single O-ring seal or a twin O-ring seal withflushing chamber.

productquench liquidatmosphere