• Often copied but never matched!
    Often copied but never matched!

    Trust the original!

    Despite the efforts of other suppliers, replications never achieve the economic efficiency and service life of an original Krumme system solution.

Krumme – Special construction for purification plants – Scraper tracks – Before > After

Go to the round tank examples

Go to the rectangular tank examples

 

Scraper tracks in purification plants are concrete components under high mechanical and chemical stress. Without protection, even well processed ready-mix concrete cannot fulfil these requirements in the long run. Damage such as spalling, crack formation and the sanding of fine particles often occur already few years after commissioning.

Krumme – Special construction for purification plants – Scraper tracksUp to the 1990s, plastic coatings were used as a preventive protection measure and constituted the preferred choice for the renovation of scraper tracks. However, different thermal coefficients and the water impermeability of the plastics are often the reason why they only have a limited service life.

Krumme – Special construction for purification plants – Scraper tracksEach scraper track is as durable as the foundation on which it is built. In the long run, a tank top edge only remains free from damage if the foundation is sustainably restored by means of proper concrete renovation. We remove damage from the ground up instead of covering it.

Krumme – Special construction for purification plants – Scraper tracksThe tank top edge covers made by Krumme have proven themselves on various tank types and partly under extreme scraper loads for more than 30 years as the most economical long-term solution. Benefit from our experience of over 30 years as well!

Krumme – Special construction for purification plants – Scraper tracks Krumme – Special construction for purification plants – Scraper tracks

A thorough concrete foundation and the installation of the stainless steel elements are crucial.

Krumme – Special construction for purification plants – Scraper tracks

Only the combination of a secured, stable concrete foundation and the established Krumme track provides maximum shock absorption. This ensures a wear- and failure-free scraper track as well as consistent weather protection of the tank top edge. No other scraper track system provides similar reliability and safety.

Tank top edges made of pure concrete cannot compete. Moisture, frost and constant use by the scraper cause significant wear at the surface.
 Tank top edges made of pure concrete cannot compete. Moisture, frost and constant use by the scraper cause significant wear at the surface.
Tank top edges made of pure concrete cannot compete. Moisture, frost and constant use by the scraper cause significant wear at the surface.

Unprotected expansion joints are the weak point of any concrete structure. Water and frost can attack here. Soon, the scraper wheel is damaged.Unprotected expansion joints are the weak point of any concrete structure. Water and frost can attack here. Soon, the scraper wheel is damaged.


Stainless steel is the measure of all things.

Stainless steel is the measure of all things.

In the purification plant area, only materials from resistance class 2 should be processed. This means stainless steel of class 1.4301.

However, aluminium or other metals are recommended due to their favourable thermal conductivity or their low costs/material prices. These materials can only withstand the forces of the scraper for few years if the loads are high. The brittle metal soon gets hairline cracks and breaks. Galvanised steel rails of restraints will soon be mechanically damaged and corrode. At first, only the visual appearance is affected; later the increased friction impacts the function of the scraper.

Rigid stainless steel covers are also unsuitable. Vibration and material expansion will soon cause massive damage. Starre Edelstahlabdeckungen sind ebenfalls ungeeignet. Vibration und Materialdehnung sorgen bald für massive Schäden.Rigid stainless steel covers are also unsuitable. Vibration and material expansion will soon cause massive damage.

The rails of a restraint consist of galvanised steel. After the material abrasion, rust will follow. In addition, the rigid rail basis causes damage in the concrete due to mechanical stress.The rails of a restraint consist of galvanised steel. After the material abrasion, rust will follow. In addition, the rigid rail basis causes damage in the concrete due to mechanical stress.

 

Secondary sedimentation tank

Secondary sedimentation tank before

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Secondary sedimentation tank after

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Combined tank

Combined tank before

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Examples for round tanks after

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Combined tank

Combined tank before

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Combined tank after

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Secondary sedimentation tank

Secondary sedimentation tank before

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Secondary sedimentation tank after

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Intermediate sedimentation tank

Intermediate sedimentation tank before

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Intermediate sedimentation tank after

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Secondary sedimentation tank

Secondary sedimentation tank before

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Secondary sedimentation tank after

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Secondary sedimentation tank

Secondary sedimentation tank before

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Secondary sedimentation tank after

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Combined tank

Combined tank before

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Combined tank after

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Grit chamber

Grit chamber before

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Grit chamber after

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Grit chamber

Grit chamber before

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Grit chamber after

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Primary sedimentation tank

Primary sedimentation tank before

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Primary sedimentation tank after

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Primary sedimentation tank

Primary sedimentation tank before

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Primary sedimentation tank after

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Secondary sedimentation tank

Secondary sedimentation tank before

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Secondary sedimentation tank after

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Your contact person

Krumme – Special construction for purification plants – Consultation & contact

"Take our word for it. A personal conversation on site can never be replaced.
I am looking forward to meeting you!"

Oliver Niehues
Telephone: +49 6621 95999-16
Mobile: +49 170 6366809

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Equipment and renovation during operation

Krumme – Special construction for purification plants – Equipment and renovation during operation

Renovation with only slightly reduced purification performance of your plant. Save time and money!

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Tendering

Krumme – Special construction for purification plants – Tendering

We recommend getting in touch with your contact person if you have a specific project.

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