Fliegl Slurry Separator up to 40 m³/h, PC pump, 2 × 5.5 kW

Scope of Delivery

• 1 × Fliegl slurry separator with progressive cavity pump
• Stone trap
• Frame with height-adjustable feet
• Suction hose Ø 152 mm incl. suction pipe
• Return hose Ø 102 mm
• Overflow hose Ø 76 mm
• Automatic control cabinet with breakthrough protection
• Electric hour meter
• Operating manual with CE conformity

Available as an option:

• Conveyor belt, 4 m length, 1.1 kW electric motor, worm gear drive

Technical Data

Option: conveyor belt

Product Information

High-performance slurry separator from Fliegl with progressive cavity pump

The Fliegl slurry separator is a powerful solution for the efficient separation of slurry into solid and liquid components. With an adjustable throughput of up to 40 m³/h, the system is ideal for modern agricultural operations and biogas plants.

Why separate? The calculation at a glance

Slurry is roughly 90 to 95 per cent water. Everything that is stored, stirred, pumped and transported is predominantly water – with all the costs attached to it.

Separation divides these two phases and makes each usable in its own right. The effect shows in several places at once.

Around 30 % less slurry volume

Separation reduces the slurry volume by approx. 30 %. This significantly lowers storage and transport costs.

What this means concretely:

Storage capacity. Anyone operating at the limit of their tank capacity gains almost a third in reserve – without building. With increasing requirements for storage duration, this is often the more economical alternative to new construction.

Transport. Every load not driven saves diesel, time and machine hours. With distant fields, transport is often the largest cost block in the entire slurry application.

The solid fraction is also stackable and can be handled with standard equipment – front loader, muck spreader, composting facility.

Noticeable odour reduction

Separation produces a noticeable odour reduction. The reason lies in the separation itself: a considerable part of the odour-intensive organic matter transfers into the solid phase and is thus removed from the liquid.

For farms on village outskirts, with neighbours, or in regions with strict emission requirements, this is often the decisive argument.

More fluid liquid phase

The liquid phase becomes more fluid, which facilitates near-surface application and reduces the energy required for pumping.

This is a twofold technical gain:

Near-surface application. Trailing hose and trailing shoe spreaders are now widely mandatory. They are sensitive to solid content – blocked hoses mean downtime and uneven distribution. Separated slurry passes through instead of blocking.

Lower pumping energy requirement. A thin medium has less flow resistance. This reduces fuel or electricity consumption during transfer and application.

There is also an often underestimated point: stirring in the tank becomes easier too, because no floating crust forms.

Optimum nutrient utilisation

Separated slurry enables faster and better nutrient uptake by plants.

The mechanism: thin slurry infiltrates the soil faster. The shorter it stands on the surface, the less ammonia nitrogen is lost to the air – and the more is available to the plant.

In addition, forage contamination in the fields is reduced, contributing to improved forage quality.

This is a point that translates directly into results in grassland farming: slurry sticking to stalks and leaves ends up in the forage at the next cut. The consequences range from poorer silage quality through fermentation faults to animal health problems. Thin, quickly infiltrating slurry reduces this input considerably.

Fast set-up and simple handling

Thanks to a well-conceived design, the separator is ready for use in a maximum of 15 minutes by just one person.

This is more relevant in practice than it first sounds: equipment requiring two people and half an hour of set-up time gets used less often. Fifteen minutes for one person means it is worth deploying even for a single tank emptying.

The stable frame with height-adjustable feet enables secure positioning even on uneven ground – in the yard, at the tank, on gravel or concrete. Without packing pieces, without improvisation.

Progressive cavity pump – the right pump design for slurry

The separator is equipped with a robust progressive cavity pump. This is a deliberate technical decision with clear advantages over centrifugal pumps:

Constant delivery independent of back pressure. A progressive cavity pump is a positive displacement pump – it delivers a defined volume per revolution regardless of rising resistance. This is the prerequisite for a uniform separation process: the separator only works consistently if it is fed consistently.

Self-priming. The pump draws the medium in by itself – no filling, no priming.

Handles solids and viscous media. This is exactly what the design is made for.

Gentle delivery. The medium is displaced, not thrown – reducing foam formation.

Stone trap – the unobtrusive protection

The pump is supplied including a stone trap. This component prevents the most common damage case on progressive cavity pumps.

In every slurry tank, sediment accumulates over the years: stones, sand, metal parts, concrete and brick fragments, ear tags, occasionally tools. If a hard foreign object enters the pump chamber, it destroys rotor and stator – the pump's most expensive wear parts.

The stone trap catches these foreign objects before they reach the pump. It is opened and emptied regularly – one action that prevents pump damage.

Automatic control cabinet with sensor-controlled breakthrough protection

An automatic control cabinet with sensor-controlled breakthrough protection ensures safe and reliable operation.

The breakthrough protection is the most important safety function of the entire system. It monitors whether the separator is still separating or whether unseparated slurry is breaking through – for instance because the screen is blocked, the auger is jammed or the feed rate is too high.

Without this monitoring, liquid slurry could pass unnoticed into the solids area. The consequences: a contaminated solids heap, an overflowing collection area, an unusable result – and in the worst case slurry escaping where it should not.

Automatic operation also means: the separator runs without constant supervision. You start it, get on with other work and come back when the tank is done. At 40 m³/h and typical tank sizes, that is several hours – time that can be used elsewhere.

Adjustable throughput up to 40 m³/h

The throughput is adjustable. This is more important than a pure maximum figure suggests.

The relationship: throughput and dry matter content of the solid fraction are linked. Working fast produces wetter solids; throttling the throughput yields drier, more stackable material.

The correct setting depends on the objective:

• Maximum throughput – where volume reduction and quick tank emptying are the priority
• Reduced throughput – where the solid fraction is to be composted, used as bedding or transported and therefore needs to be drier

The type of slurry also plays a role: cattle slurry, pig slurry and digestate behave differently and each require their own settings.

Two motors of 5.5 kW each

Separator and screw pump each have their own 5.5 kW electric motor. Separate drives are the right solution for this process: both units have different load profiles and speed requirements, and the feed rate can be regulated independently of the separator speed.

Power is supplied via a 32 A socket – a connection widely available on agricultural holdings.

Important when planning: the connection must cope with the starting currents of both motors. With long supply cables, ensure adequate conductor cross-section – voltage drop leads to increased current draw and thermal stress on the motors.

Well-considered hose dimensions

The three hose connections are dimensioned according to function:

Suction hose Ø 152 mm incl. suction pipe – the largest cross-section for the suction side. This is structurally correct: no bottleneck may occur on the suction side, otherwise the delivery flow breaks down. The supplied suction pipe enables targeted extraction from the tank.

Return hose Ø 102 mm – returns the separated liquid phase.

Overflow hose Ø 76 mm – the safety level in case more flows in than is discharged.

Electric hour meter

The basis for maintenance planning: filter and screen cleaning, lubrication intervals and the condition of rotor and stator are governed by operating hours. In shared use or hire, the meter also serves as a billing basis.

Optional conveyor belt for maximum efficiency

A 4 m long conveyor belt can optionally be mounted on the separator frame. This facilitates direct loading of the solid fraction into a collection area and considerably reduces labour and time.

The practical benefit: without a conveyor, the solid fraction falls directly beneath the separator. Before long it piles up to the discharge – then work must stop for clearing, or the unit must be repositioned.

With 4 metres of conveying length, the solid fraction ends up where it belongs:

• Straight into the trailer or container
• Onto a built-up heap rather than spreading out flat
• Into a bay or onto the muck pad

The 1.1 kW electric motor with worm gear drive is appropriately specified: worm gears are self-locking – the belt does not run backwards when switched off and does not discharge itself.

In continuous operation the conveyor is practically essential.

What happens to the solid fraction

The solid phase is stackable and versatile:

• Composting and sale as substrate
• Bedding in cattle husbandry after appropriate treatment
• Application with the muck spreader on distant fields – high nutrient density at low volume
• Feeding biogas plants with a defined dry matter content
• Marketing to farms with nutrient requirements

Points to observe

Electrical connection by a qualified electrician; ensure correct direction of rotation on both motors.

Check and empty the stone trap regularly – this is the most important recurring maintenance task.

Rotor and stator of the progressive cavity pump are wear parts. The pump must never run dry – even brief dry running destroys the stator.

Frost protection. After use and before frost periods, drain pump, hoses and separator.

Hazards from fermentation gases. When stirring and pumping slurry, hydrogen sulphide, ammonia, methane and carbon dioxide can be released. These gases are life-threatening. Ensure adequate ventilation, do not enter tank areas, keep people and animals away. The relevant regulations on handling slurry tanks must be complied with.

Nutrient documentation. After separation there are two material streams with different nutrient contents. Both must be recorded separately for fertiliser requirement calculation and documentation; analysis of both phases is advisable.

As work equipment, systems of this type are subject to requirements regarding protective devices and recurring inspection under the applicable national regulations.

Typical Applications

Dairy and cattle husbandry, pig husbandry, biogas plants and digestate treatment, farms with limited storage capacity, farms with distant application areas, village-edge locations with odour issues, grassland farms with forage quality requirements, inter-farm cooperation and contractors, machinery rings and shared facilities, composting operations, farms with nutrient surplus, regions with strict fertiliser regulations.

Frequently Asked Questions

How much volume do I save?
Separation reduces the slurry volume by approx. 30 %, significantly lowering storage and transport costs.

What is the throughput?
Up to 40 m³/h, adjustable. The setting also influences the dry matter content of the solid fraction: fast throughput produces wetter solids, throttled throughput drier solids.

How long does set-up take?
A maximum of 15 minutes – and by a single person.

Can I set the separator up on uneven ground?
Yes. The stable frame has height-adjustable feet and enables secure positioning even on uneven ground.

Why a progressive cavity pump?
Because as a positive displacement pump it delivers a constant volume regardless of back pressure – the prerequisite for a uniform separation process. It is also self-priming, handles solids and delivers gently.

What is the stone trap for?
It catches stones, sand and metal parts before they reach the pump. Foreign objects destroy rotor and stator – the most expensive wear parts. The trap must be emptied regularly.

What does the breakthrough protection do?
It monitors by sensor whether the separator is still separating or whether unseparated slurry is breaking through – for instance with a blocked screen or excessive feed rate. It is the most important safety function and enables unsupervised operation.

Do I have to stay with the machine during operation?
The automatic control cabinet enables operation without constant supervision. At 40 m³/h and typical tank sizes the unit runs for several hours.

What power connection do I need?
A 32 A socket. The connection must cope with the starting currents of both 5.5 kW motors; with long supply cables, ensure adequate conductor cross-section.

Does application become easier?
Yes. The liquid phase becomes more fluid – this facilitates near-surface application with trailing hose or trailing shoe and reduces the energy required for pumping.

What does separation achieve for the plants?
Separated slurry enables faster and better nutrient uptake, because thin slurry infiltrates the soil faster and less ammonia nitrogen escapes into the air.

Does forage quality improve?
Yes. Forage contamination in the fields is reduced, contributing to improved forage quality – thin slurry infiltrates faster and sticks less to stalks and leaves.

What is the optional conveyor for?
It facilitates direct loading of the solid fraction into a collection area and considerably reduces labour and time. Without a conveyor the solid fraction piles up beneath the separator and blocks the discharge.

What do I do with the solid fraction?
Compost it, use it as bedding after treatment, apply it with a muck spreader on distant fields, feed it into biogas plants, or market it.

What must I observe when handling slurry?
Stirring and pumping can release life-threatening gases – hydrogen sulphide, ammonia, methane and carbon dioxide. Ensure adequate ventilation, do not enter tank areas and keep people and animals away.

What about nutrient documentation?
After separation there are two material streams with different nutrient contents. Both must be recorded separately; analysis of both phases is advisable.