Industrial Fans

Pressure resistant

In processes involving a system inlet pressure of at least 0.5 bar, a solid, pressure-resistant design is required to ensure that welds, walls, flanges, bolts and other components can withstand the system pressure.

Relieable pressure resistance

The components are continuously welded on both sides in the pressure-resistant design. Materials are selected and wall thicknesses are calculated to meet requirements. Pressure-resistant fans from Reitz are subject to the Pressure Equipment Directive, with welds undergoing dye penetration testing and a pressure test. All relevant testing documents are carefully archived.

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Pressure shock proof

Pressure shock-proof designs up to 10 bar (absolute) are part of our proven delivery programme. Continuously housing welds and stiffeners also provide the required stability.

No explosion weak points

In the event of a pressure shock occurring within the range of 0.2 to 10 bar, REITZ pressure shock-proof fans can withstand the pressure without rupturing. Minor warping can occur. REITZ has manufactured several hundred pressure shock-proof fans to date in the range up to 10 bar. Housings are continuously welded both externally and internally, while wall thicknesses, flanges and bolts are adapted to suit the calculated requirements. Additional protection is provided by all-round radial stiffeners. Welds are subjected to standard dye penetration testing, and all relevant testing documents are carefully archived.

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Gas-, Liquid- and Dustproof

Absolute tightness is a top priority in the requirements profile when dealing with problematic media such as toxic liquids or gases. With an equally high level of care and know-how, REITZ meets all the relevant safety standards.

Optimum protection for the environment

In order to prevent anything escaping to the exterior and ensure that people and the environment enjoy maximum safety, we equip our gas, liquid and dustproof fans with a sealing system which has proven its effectiveness thousands of times in practical applications. In addition to gasproof welding of the housing, shaft passages and flange connections are equipped with reliable sealing technologies such as the multichamber labyrinth seal and, where required, the barrier gas connection or grease seal.

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Corrosion protection

Reitz corrosion protection variants offer the highest levels of hygiene and durability. We supply a broad spectrum of effective corrosion protection measures which have proven their reliability under practical conditions and are tailored exactly to meet your application specifications.

Paint and surface coating

Primer, intermediate and top coats
A paint finish is a simple but well-proven form of corrosion protection. All RAL colours and a variety of paint systems are available.

Chrome-plated, nickel-plated, galvanised design
Galvanising with corrosion-resistant layers provides components with reliable protection. There are sound reasons for choosing high-performance chrome, nickel or zinc-based protection, depending on the application and requirement involved.

Rubber and special coating

Halar® is a high-performance thermoplastic fluoroplastic which is highly resistant to chemicals and provides excellent corrosion protection and thermal properties. Halar® is abrasion resistant, has excellent anti-adhesion properties, a smooth, non-porous surface and contains no solvents. Stove enamel finishes from Säkaphen® offer high-end corrosion protection against aggressive media. Säkaphen® guarantees excellent protection against strong acids and alkaline media, particularly at high temperatures.

Chemical surface treatment

The main purpose of chemical treatment is to achieve a high surface quality.

Pickling
Pickling to protect and clean the surface rigorously removes oxides, particularly heat tinting (e.g. in the vicinity of welds), other discolouring and corrosion spots.

Passivating
In the case of steel and many other metals, it may be practical under certain circumstances not to leave development of a protective passivation layer to chance. Creation of the passivation layer is accelerated in a targeted manner through the process

Electropolishing
Employing an external power source, this electrochemical removal procedure reduces microroughness and improves the smoothness of the metal. As a result, dirt and other residues find it more difficult to stick and the component surfaces can be cleaned more effectively.

Mechanical surface treatment

When combined with chemical surface treatments, mechanical processes achieve the required polish and sheen.

Vibratory grinding
Impellers and surfaces in contact with the product are initially pickled and passivated in many cases before achieving an optimum surface quality through vibratory grinding. The workpiece is ground with abrasive media in a vibration container during this, achieving a precise removal of material.

Sandblasting and glass bead blasting
Similar to vibratory grinding, sandblasting and glass bead blasting are employed to achieve maximum homogeneity of surfaces and the side effect of material solidification. Uniform deburring, oil removal, degreasing, descaling, smoothing, polishing, cleaning, rounding of corners and grinding are the corrosion-reducing options this treatment offers.

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Explosion protected

Special safety precautions need to be taken where combustible dust and gases are conveyed or may be present in the environment. Pursuant to the currently valid ATEX directive, explosion-protected designs from REITZ are equipped with all necessary security features.

Characteristics which ensure the high safety standard include a constructional safety that is adapted to the required ATEX category, special seals for the shaft passage, continuous weld seams, high-quality balancing and provisions for grounding of the fans.

Both the ATEX design for the European area and the spark protection version for fans installed outside the EU comply with the EN 14986:2017 standard (“Design of fans working in potentially explosive atmospheres”). Any such fan is tested and recorded by REITZ quality assurance pursuant to the REITZ explosion protection directive.

On a volunteer basis, Reitz is audited by a certified auditing company at regular intervals in order to fulfil its high quality standards.

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High temperature resistant

Under practical conditions, extremely hot media represent a major challenge for the safe and trouble-free operation of ventilation systems. Reitz has developed unique know-how in this area which discerning plant manufacturers exploit all over the world to ensure the success of their projects.

Ideally equipped against hot media up to 500 ºC

Extreme process temperatures up to 500 °C pose no problem for Reitztemperature design fans. The special Reitztemperature design, which includes the use of additional cooling, sealing and insulation components, ensures that operation is safe. In addition to other measures, solutions such as the thermal separation of the pedestal and housing or a cooler fan to support the heat flinger and stabilise the bearing temperature are fitted to stabilise the system at extremely high temperatures. Moreover, Reitz fans are designed for continuous trouble-free operation under extreme exterior temperatures.

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Wear protection

Wear protection is a preventive measure to protect high-performance components against abrasive material in the air flow. A positive effect is the increased service life and the avoidance of subsequent costs. Reitz offers an entire spectrum of innovative low-wear measures which take optimum efficiency into consideration.

Effective protection, optimum efficiency

Long service periods and high levels of efficiency are absolute prerequisites for efficient plant operation. Unnecessary wear costs millions, and non-optimised efficiency leads to the unnecessary waste of energy. In cooperation with prestigious institutes and technical colleges, the Reitzdevelopment department focuses continually for this reason on optimisation through the use of improved materials and geometries. One result of this can be seen in service period guarantees of up to 15,000 operating hours for impellers and housing components which is perceptible in the operational reliability and profitability of the production process.

Wear protection measures

Low-wear impeller geometries
In the case of severely abrasive media, optimised impeller types ensure a smoother, more uniform flow through the impeller, reducing sticking material and wear processes to a minimum.

Use of suitable materials
We only use particularly robust, high-strength materials of proven quality to ensure that your fans can withstand even the highest levels of stress.

Increasing material thickness
Reitz low-wear fans are distinguished by above-average resistance and durability, both in terms of the increase in the base material thickness and the targeted welding of wear plates in critical areas.

High-precision machining
Particularly careful and uniform machining is required in critical areas such as welds and edges to avoid material sticking and other processes which contribute to wear from the outset.

Protective surface structure and coating
Special surface structures and coatings which are continuously optimised and harmonised in the REITZ measurement centre and labs protect the base material and optimise the conveyance of solids.

Innovative impeller geometry shows the way

Achieving the balance between the demands of wear protection and best-possible efficiency is the noble art of engineering. And a high degree of efficiency need not be dispensed with in the case of fans which convey solid material. Efficiency levels which exceed 80 % can also be realistically achieved in these applications, depending on the pressure and flow range.

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Hygienic Design

Non-corrosive material, flawless surfaces

Consistent quality assurance pursuant to EHEDG directives begins with the selection of materials. Only those which do not endanger health can be considered. Stainless steels are subjected to additional electropolishing or vibratory grinding. After all, surfaces which come into contact with the product need to be extremely smooth to prevent anything adhering to them. A medium roughness value of Ra = 0.8 my should not be exceeded at any relevant point. Gaps, scratches, pores, holes or badly executed welds cannot be tolerated.

Exclusively FDA-compliant materials
The materials we use are exclusively FDA compliant (Food and Drug Administration) and represent no danger whatsoever to human health. This generally involves stainless steel. Our quality control begins with the professional selection and procurement of materials from certified suppliers and continues with careful handling and machining until the final product is completed.

All surfaces undergo intensive processing to avoid adhesions

Examples of surface treatment: Uniform deburring, oil removal, degreasing, descaling, smoothing, polishing, cleaning, rounding of corners and grinding are the corrosion-reducing options surface treatment offers.

Electropolishing
Employing an external power source, this electrochemical removal procedure reduces microroughness and improves the smoothness of the metal. As a result, dirt and other residues find it more difficult to stick and the component surfaces can be cleaned more effectively.

Vibratory grinding

mpellers and surfaces in contact with the product are initially pickled and passivated in many cases before achieving an optimum surface quality through vibratory grinding. The workpiece is ground with abrasive media in a vibration container during this, achieving a precise removal of material

Pickling and passivating

The purpose of pickling is to remove any impurities with the object of achieving a metallically unsoiled surface. The protective passive layer can only form on metallically pure surfaces of this nature.

Sandblasting and glass bead blasting

– Similar to vibratory grinding, sandblasting and glass bead blasting are employed to achieve maximum homogeneity of surfaces and the side effect of material solidification.

Hygienic Design & Engineering
While surface treatment and welding require process engineering expertise and craftsmanship in particular, engineering pursuant to EHEDG directives is a real challenge for designers. Each fan must meet both the individual performance requirements of the customer and every hygienic design requirement. As a result, Reitz has today amassed a rare level of know-how in the manufacture of hygienic design fans.

Cleaning made easy: Clean-in-Place

One goal of our hygienic design engineering is to completely avoid cavities within the housing in which dirt can collect. In addition, uncomplicated cleaning free of residue is a core criterion of successful hygienic designs, as the complete production facility and all machinery contained in it need to be cleaned from top to bottom in many modern companies in the food and pharmaceutical industry after each production run. The task is therefore to design all components right down to the last detail to ensure that they are optimally and, most important, speedily accessible for cleaning, to avoid adhesions and to ensure that cleaning fluid can drain away unobstructed after every cleaning procedure without leaving any residue, without the need to completely dismantle the plant.

Design variants

Reitz offers a variety of construction types and design variants. Each hygienic design fan is individually designed and equipped with all the options needed for smooth and hygienically flawless operation

Equipment options

• Pivoting housing cover
• Disengaging drive unit
• Cleaning access
• Shaft seal with drainage pipe
• Drain fitting
• Raised support for motor
• Pedestal with opening for sweeping
• Cleaning nozzle
• etc.

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