Peristaltic Pump (ALH)

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HOW DOES THE ALH PERISTALTIC PUMP WORK?

Albin's ALH Peristaltic Pump is typically used for transfer applications of abrasive, viscous, solids laden and corrosive fluids where a reliable and robust pump which offers high pressure and high flow rates is required. The ALH Peristaltic Pump range is ideal for accurate control and can achieve pressures up to 15 Bar. We have combined the best materials with smart design solutions in order to maximise running time and minimise service intervals.

The principle of operation of the pumping action in the ALH Peristaltic Pump is achieved by pinching a circular loop of rubber tube with two diametrically opposed rotating shoes. Due to the rotational movement, the fluid in the tubes is pushed ahead of each wedge. When each wedge reaches the end of the loop, the hose is released, and the wedge rotates to the start of the loop to begin a new cycle. As the wedge releases the reinforced tube, it immediately returns to its original shape, thereby ensuring positive suction and priming. Additionally, solids in suspension are never damaged by the rotating shoes as the shoes either force the solids forwards or backwards, never trapping them. This construction of the pump makes it a smart and effective choice for a wide range of pump applications.

    Benefits include:
  • - Low operating noise
  • - Reversible operation
  • - Cost effective due to low maintenance costs and easy maintenance which reduces pump downtime

CAPABILITY OF THE ALH PERISTALTIC PUMP

ALH Series
Capacity Up to 150 m³/hr
Accuracy /- 0.5%
Viscosity up to 60’000 cPs
Fluid Temperature Up to 135ºC
Differential Pressure Up to 15 Bar
Max Solids Passage Up to 30 mm

ALH Peristaltic Pump Capacity Table (l/hr) 

Continuous Use Intermittent Use Occasional Use

                                                                        Minimum 1 hr Stop after 2 hrs use               Maximum 1 Hr / Day

 

The ALH Peristaltic Pump series is available in 21 different sizes:

Type 10 rpm 20 rpm 40 rpm 60 rpm 80 rpm 100 rpm 120 rpm 140 rpm
ALH 05 (3 Lobe) 3.4 6.8 13.6 20.4
ALH 10 (3 Lobe) 10 20 40 60
ALH 10 15 30 60 90 120 150 180
ALH 15 50 100 200 300 400 500 600
ALH 20 65 170 640 500 670 850 970
ALH 25 200 400 800 1200 1600 2000 2400 2800
ALH 32 375 750 1500 2250 3000 3750 4500 5250
ALH 40 565 1170 2340 3510 4680 6850 7020 8190
ALHX 40 800 1600 3200 4800 6400 8000
ALH 50 1750 3500 7000 10500 14000 17500
ALH 65 2300 4600 9200 13800 18400 23000

 

Type 10 rpm 20 rpm 30 rpm 35 rpm 40 rpm 45 rpm 50 rpm
ALHX 80 5500 11000 16500 19250 22000 24750 27500
ALH 80 7000 14000 21000 24500 28000 31500 35000
ALH 100 12000 24000 36000 42000 48000 54000
ALH 125 22000 44000 66000 77000 88000

PERFORMANCE-AND-DIMENSIONS-PT05

PERFORMANCE-AND-DIMENSIONS-PT10

PERFORMANCE-AND-DIMENSIONS-PT15

PERFORMANCE-AND-DIMENSIONS-PT20

PERFORMANCE-AND-DIMENSIONS-PT25

PERFORMANCE-AND-DIMENSIONS-PT32

PERFORMANCE-AND-DIMENSIONS-PT40

PERFORMANCE-AND-DIMENSIONS-PT50

PERFORMANCE-AND-DIMENSIONS-PT65

PERFORMANCE-AND-DIMENSIONS-PT80

PERFORMANCE-AND-DIMENSIONS-PT125

Peristaltic hose diagram

Construction – ALH Series

To protect the bearing of the gearbox against penetration of the lubricant or the pumped liquid we fit a lip seal around a hard shaft ring. If the hose ruptures, the pumped product damages the seal instead of penetrating the gearbox. Our casting is also fitted with a Leakage Channel, which must be kept open to atmosphere.

peristaltic hose construction

Easy Wheel Dismantling

peristaltic hose easy wheel dismantling

The ALH Peristaltic Hose Pump Series employs a Vecobloc system which is very easy to dismantle. Done by unscrewing an Expandable Hub. Many of our competitor’s pumps have complex assemblies which means that wheel dismantling is often not possible in situ or by the customer.

OPTIONAL EXECUTIONS & EXTRAS

  • - Twin headed – 2 pump heads fixed to the same gear box.

  • - Versions with extended shaft for long coupled executions. Supplied with removable bearing case for easy bearing maintenance. Can be converted back to close coupled design at any time.

  • - ALHX Models feature Rollers for pumps without Lubricant

  • - ALH CIP Models for Clean In Place (CIP) applications

  • - Tri-Lobe design for precise dosing

  • - Special coatings & casing materials for extreme applications

  • - Heating Coils to maintain fluid temperature

  • - Various connection options such as SMS, Clamp, DIN, ANSI, coupling and cover.

  • - Hose rupture detector and revolution counter with digital display or pulsed output

  • - ATEX II & I certification

  • - Variable Speed with mechanical or electronic speed variator or variable speed drive with forced ventilation (1 – 100 Hz) or without (15 – 100 Hz)

  • - Vacuum Assist System for aiding with suction lift for fluids over 12’000 cPs

  • - Trolley mounted

  • - Various Drive Options: Diesel Driven, Hydraulically Driven.

ALH Peristaltic Pump HOSING

Tapflo only utilise the highest quality compound rubbers which are reinforced with 2 – 6 layers of braided polyamide and an outer layer conforming to the strictest tolerances to ensure perfect and repeatable compression every time. For the Hose Liner, 7 Materials are available: 

hose liner material

  • - NR: Natural Rubber (White marking): High abrasion resistance, the most flexible.

  • - NR Food: Natural Rubber certificate CE 1935-2004 and FDA approved, black or white inside: appropriate for the food industry.

  • - NBR: Nitrile Buna (yellow marking): Appropriate for oils, greases & polymers.

  • - NBR Food: Nitrile Buna certificate CE 1935-2004 and FDA approved, black or white inside: appropriate for the food industry.

  • - EPDM: Ethylene Propylene Diene Monomer(red marking) : High chemical resistance

  • - HYPALON / SYNTHETIC RUBBER: Chlorosulfonated Polyethylene (blue marking): High chemical resistance to fluids like sodium hypochlorite, chromic, nitric, sulfuric acids.

  • - VITON / FKM: (purple marking): High chemical resistance, especially to solvents, lubricants, petrol’s & fuels. Good temperature resistance.

ALH PERISTALTIC PUMP VS AIR OPERATED DIAPHRAGM PUMP

peristaltic comparison table
  

  • - Air Operated Diaphragm Pumps require a compressed air supply to drive them. If this does not already exist it can be very expensive to install. Even the best-maintained air supply systems are inefficient with at least 30% air leakage. The energy costs of supplying air for an Diaphragm Pump are much higher than for a Peristaltic Pump.

  • - Air pressure limits the discharge pressure – it just stops pumping beyond its limits.

  • - Changing pumped fluid is complex as cleaning an Air Operated Diaphragm Pump is difficult, often requiring a complete strip-down. Albin's ALH Series pumps offer a quick maintenance schedule on their pumping elements. Change the tube, create a new pump.

  • - The difficulty in accurately controlling air supply makes the AODD a poor choice for metering duties.

  • - Even double diaphragm pumps have a high level of pulsation.

  • - As with all Diaphragm Pumps, AODDs generally rely on ball valves. These do not work well unless there is positive back pressure to close them between cycles. They are prone to abrasive wear and can clog with crystals, fibres or solidifying fluids such as inks and powders.

  • - Whilst the initial purchase cost is lower, cost of ownership can much higher due to energy and maintenance costs.

 

ALH Peristaltic Pump vs Piston Pumps

  • - Piston pumps rely on ball valves, which must be protected with strainers and yet more valves: back-pressure valves, for example. Foot valves are needed to maintain prime. Valves are prone to clogging and breakdown.

  • - Piston pumps are expensive to maintain, requiring disassembly for cleaning, which can still be difficult to achieve properly; with the result that contamination is a common problem.

Albin's ALH Peristaltic Pumps score on all counts.

  • - No valves

  • - No ancillary equipment

  • - Low maintenance

  • - Low cleaning

 

ALH Peristaltic Pump vs Progressing Cavity Pumps

  • - Progressing cavity pumps cannot run dry, for more than a few seconds. They can self-prime but if the fluid takes time to get to the pump then the rotor/stator must either be manually lubricated or the pump needs initially priming.

  • - Progressing cavity pumps suffer from wear if particles drop out of the solution or if an abrasive suspended solid lodges within the cavity. Wear increases by the square of the speed.

  • - Progressing cavity pumps have a large stator in alternating in with the rotor and the duty fluid. Stator particles easily become detached and entrained within the fluid flow.

  • - Progressing cavity pump rotor replacement is a skilled task requiring a long downtime. Pump selection is also a skilled task and many pumps are badly specified which can lead to premature failures in rotors, stators and mechanical seals.

  • - Once installed a Progressing cavity pump requires a lot of floor space.

Albin's ALH Peristaltic Pump series scores on all counts:

  • - Unlimited dry running and fully self-priming

  • - Excellent abrasive fluid handling

  • - Low spares costs and simple maintenance

  • - No Mechanical seals

 

ALH Peristaltic Pump vs Lobe Pumps

  •  - Lobe pumps are not good for metering duties because fluid slips between the lobes and the casing. Peristaltic Pumps have a true positive displacement action – fluid is pushed in front of a tube pinched closed & precise volumetric efficiency.

  • - Lobe pumps are known for low shear pumping, but Peristaltic Pumps produce an even lower shearing effect.

  • - Lobe pumps are generally not good with abrasive fluids or with hard solids. These wear the lobes and can get trapped in the space between the lobes and casing, causing scoring. Worn or damaged lobes reduce capacity through increased slip.

  • - Lobe pumps have two shafts and so two sets of mechanical seals. These are expensive to maintain and the timing gears need careful resetting after maintenance to ensure lobes do not clash. The fluid does not contact a Peristaltic Pump and vice versa, so abrasives are handled with ease.

  • - For CIP applications, lobe pumps require by-pass pipework to divert some of the flow. Peristaltic Pumps have a full flow path through the tube for CIP duties. Installation costs are also lower.

  • - Industrial Lobe pumps are difficult to clean because of dead spots in the casing. Mechanical seals need swabbing to verify cleaning procedures have been effective.

  • - Lobe pumps are not flexible and must be specifically designed for the application. Changing parameters can cause pumping problems. Temperature changes, for example, can result in "galling", where flakes of metal from the lobes are released into the fluid, causing contamination.

Albin's ALH Peristaltic Pump series score on all counts:

  • - Accurate metering

  • - Low-shear pumping

  • - Good abrasive and hard solids handling

  • - No mechanical seals

  • - Low cost and simple maintenance

  • - Simple installation

  • - Flexible operation

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