Wolter GmbH. Maschinen- und Apparatebau KG.
Address
Wolter GmbH. Maschinen- und Apparatebau KG.
Am Wasen 11
76316 Malsch
Germany
Telephone+49 7204 92010
Fax+49 7204 920111
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About us
WOLTER – Ventilation engineering since 1971.
Since 1971, WOLTER has been engaged in the design and manufacturing of axial and centrifugal ventilation fans for the building services industry as well as industrial use. In the building technology sector our focus is to provide efficient and durable solutions for general ventilation, smoke-extraction applications as well as for car-park and tunnel ventilation systems.
WOLTER maintains two production facilities in Germany as well as several subsidiaries in Asia that serve their respective local markets. Our production capabilities are characterized by state-of-the-art machinery and a high degree of vertical integration, including our own high-pressure die casting of aluminium components, which ensures comprehensive control over product quality. Our experience in aluminium pressure-casting is also drawn upon by various other manufacturers, for whom we serve as a component supplier. Evidently, our quality management system is certified in accordance with DIN EN ISO 9001:2015.
Our product design process incorporates aerodynamic performance, acoustics and vibration engineering as well as drive and control technology. The highly complex interrelation between these factors always represents an engineering challenge that we face in each new project, whether it is the continuous improvement of existing product ranges, the innovative development of new product lines or the development of customer-specific solutions. In doing so we make use of modern development tools such as Computational Fluid Dynamics (CFD) simulations. We employ this technology not only for the aerodynamic optimisation of our own products, but also in order to simulate the interaction between the fan and the entire ventilation system, as a fan is never a stand-alone machine but a component of a larger system that must be evaluated in its entirety. Here we can offer our support.
For research and development, quality assurance and factory acceptance tests, amply dimensioned in-house testing facilities and measuring equipment is at our disposal, including four fan test rigs, two of which are AMCA accredited.
All development, sales and commercial departments are centrally located in our head office in Malsch, Germany. Our sales staff is supported by a wide network of agents and sales representatives, local WOLTER companies and sales partners will assist you during all stages of your project, from design to after-sales service.
WOLTER is your competent partner in ventilation.
Our products are well-proven in virtually all general HVAC applications and meet constantly increasing demands with regard to energy efficiency and safety of public and private buildings. Modern ventilation technology thus sustainably lowers operating cost over the livetime of the plant – a decisive factor in new construction as well as in retrofitting existing buildings.
Our standard product range for building services is comprehensive and can be supplied from stock or within short lead times:
• Axial fans
• Smoke-extraction fans
• Axial and centrifugal car-park jet fans (Impulse fans)
• Centrifugal fans
• Duct fans
• Tube fans
• Roof Fans
• Standard components and accessories
• Control equipment
All standard product ranges sold within the European Union comply with latest ErP regulations. Products using external rotor motors are available with EC or ErP-compliant AC drives. A comprehensive set of accessories completes our product offering.
In the industrial and OEM sectors, WOLTER products are used in various applications, such as:
• Shipbuilding and off-shore industries
• Wind power generation
• Road and railway tunnel ventilation
• Wind speed fans for automotive test rigs
• Chemical-resistant applications
• Building materials production
• Food processing, etc.
While our range of standardized designs meets most requirements, we also regularly develop OEM products in close co-operation with our customers where conditions necessitate a bespoke solution with respect to material selection, surface treatment, build space constraints or electrical drive package.
From design stage through to commissioning and after-sales service, we will be able to assist in every step. At WOLTER, we understand that build quality, delivery reliability, energy efficiency but also cost-effective product design are factors of paramount importance to our cusotmers.
We are committed to this.
Our product groups
Our application areas / Solutions
Keywords
- Brandgasventilatoren
- Smoke-extraction fans
- Axial Fans
- Ventilatoren
- Jet fans
Our Products
Axial flow fans
Wolter axial flow fans can be used for various applications in general building ventilation as well as industrial applications. Standard diameters range from 315 to 2500mm.
Special executions are available for:
- smoke-extraction applications 300°C/2h and 400°C/2h
- marine and off-shore industries
- explosion-proof applications
- applications requiring reversible airflow
- highly corrosive atmospheres
- mobile applications
- two-stage counter-rotating fans for higher pressures
- BXV range for lighter duties
Apart from our standard range, a wide variety of purpose-built axial fans for special applications is available, e. g.
- Tunnel jet fans
- Windspeed fans for automotive test rigs
- Cooling tower fans
- Mobile overpressure fans for firefighters
- Cooling fans for windpower generators
- Fans for staircase pressurization systems
- fans for applications in building materials production
- fans for applications in food processing
Visit www.wolter.eu to obtain a login for our online fan selection application!
Impellers of AXV-AL / BXV-AL range axial fans are made from injection-mould aluminium. On larger fan sizes, hubs are made from a combination of injection-mould aluminium and cast iron. Casings are manufactured from hot-dip galvanized steel. Flanges are rolled and have a pitch circle according to DIN 24 154 R2 (half number of holes).
In the standard ranges, short- and long-cased versions are available. Different surface treatments such as powder-coating or different casing materials (e.g. stainless steel or aluminium) are available.
Different possible hub ratios for a given diameter and different solidities of the impeller allow for a very wide range of impeller configurations, significantly expanding the performance range and allowing to match the required duty points very precisely. Pitch angles are adjustable during standstill.
The IEC standard motors used in AXV / BXV-range axial fans are wired to an external terminal box and fans are shipped installation-ready.
Of course a wide range of accessories is available, including silencers and air-operated or motorized cowls for vertical installation as a roof fan up to temperature class 300°C/2h. WOLTER AXV/BXV axial flow fans are available for all forms of running.
Centrifugal Fans
WOLTER offers an extensive range of centrifugal fans, both for building services and industrial applications.
This inlcudes:
- forward- and backward curved impeller types, single- or double-inlet
- Direct- or belt-driven fan
- Plug fan units
- Driven by IEC standard motors or external rotor motors (with ErP-compliant EC- or AC-drives)
Most of our standard products for the building services industry are available from stock or within short lead times.
The WOLTER standard fan ranges for building services applications comprise:
- Tube fans (plastic and steel casings)
- Duct fans
- Kitchen-extract boxes
- Silent boxes
- Roof fans (vertical and horizontal exhaust) for medium temperatures up to 120°C
- Plug fan units
- Direct-driven, single-inlet fans with IEC standard motors or external rotor motors
- Belt-driven single- and double inlet fans, forward- and backward-curved, for cooling towers or AHU applications
Ranges with external rotor motors are available with EC drive technology. Fans with IEC standard motors can be supplied with electronic variable speed drives.
WOLTER industrial centrifugal fans are usually purpose-built and find use in various industries. Applications include:
- Cooling fans for windpower generators / Nacelle cooling
- Fans for marine and offshore-applications
- Windspeed fans for automotive and motor test rigs
- Chemical-proof fans for corrosive media
Please do not hesitate to contact us with your special requirements. We are well prepared to custom-design adequate solutions for the differing needs of our OEM-customers.
Smoke-extraction axial flow fans 300°C/2h / 400°C/2h (F300/F400)
WOLTER AXV-type smoke-extraction axial fans are tested and certified in accordance with EN ISO 12101-3 for 300°C/2h and 400°C/2h use by MPA Braunschweig/Germany.
The fans may be used inside as well as outside of the fire zone, with floor installation or suspended from the ceiling. All fans are also suitable for open-air installation. Available sizes range from 315 to 2000 (F300) and 315 to 1600 (F400). Both, uni-directional as well as fully reversible impellers types may be used. Higher pressures can be achieved with counter-rotating two-stage fans. If required, fans may be placed in acoustically insulated cabinets.
A wide range of certified accessories is available, such as the motorized RUM roof cowl for vertical installation as an 300°C/2h smoke-extraction roof fan.
Visit www.wolter.eu to obtain a login for our online fan selection application!
Impellers of AXV-AL 300°C/2h range axial fans are made from injection-mould aluminium. On larger fan sizes, hubs are made from a combination of injection-mould aluminium and cast iron. For 400°C/2h fans, impellers are made of steel.
Casings are manufactured from hot-dip galvanized steel. Flanges are rolled and have a pitch circle according to DIN 24 154 R2 (half number of holes).
Short- and long-cased versions are available. Different surface treatments such as powder-coating or different casing materials (stainless steel) are available.
In the F300 range, different possible hub ratios for a given diameter and different solidities of the impeller allow for a very wide range of impeller configurations, significantly expanding the performance range and allowing to match the required duty points very precisely. Pitch angles are adjustable during standstill.
The IEC high-temperature motors used in AXV-range axial fans are wired to an external terminal box and fans are shipped installation-ready.
Of course a wide range of accessories is available that has been tested and certified for use in conjunction with our smoke-extraction axial fans. This includes, for example, motorized cowls (RUM) for vertical installation as a roof fan up to temperature class 300°C/2h. WOLTER AXV smoke-extraction axial flow fans are available for all forms of running.
Car-park Jet Fans / Impulse fans
WOLTER is a major international supplier of components and complete turn-key systems for car-park ventilation projects based on the induction ventilation principle.
Wolter offers both, axial- and centrifugal-type jet (impulse) fans for standard CO ventilation as well as for smoke-extraction and smoke-control systems.
The range of axial jet fans is certified in accordance with EN ISO 12101-3 for 300°C/2h and 400°C/2h. The jet fans are available with oval- or round-shaped silencer casings, either with long or short casings (for limited installation space). The minimal height of the units allows for the installation where headroom clearance is restricted.
WOLTER axial car-park jet fans are available for uni-directional as well as for reversible systems.
Centrifugal jet fans (JFC-type) are available for temperature class 300°C/2h.
Based on customer requirements, we are able to offer the full range of services and components required to successfully implement a car-park jet ventilation system:
- Assistance with the layout and studies of ventilation and smoke-control scenarios based on Computational Fluid Dynamics (CFD) analysis
- Axial or centrifugal jet fans (impulse fans)
- Main extract and supply fans (AXV-range)
- Control cabinet and automation, integration with the building management system
- CO gas detection system, optical and acoustic warnings signs, dampers etc.
Experience is paramount when it comes to the planning and installation of a jet ventilation system. Our global reference list stands out. Wolter specialist engineers will be happy to assist you in every way possible – send us your plans or contact us to arrange for a meeting.
WOLTER axial car-park jet fans are available as axial and centrifugal type.
Axial car-park Jet Fans
- Standard- or high temperature-executions
300°C/2h and 400°C/2h - Oval or round-shaped silencers casings
- Uni-directional and reversible types
- Long or short silencers casings (for restricted installation space)
- The motor-impeller unit can be extracted from the jet fan casing for servicing without the need to dismount the entire jet fan from the ceiling (JFUO/JFRO types with oval casing)
- Fan sizes 250-400
- Thrust range 5N-85N
- Motors are wired to an external terminal box, fans are delivered ready for installation
- High-temperature repair switches optional
Centrifugal car-park Jet Fans / Impulse Fans
- Standard- or high temperature-execution
- 300°C/2h
- Thrust ratings of 30N, 50N, 60N, 80N and 100N
- Motors are wired to an external terminal box, fans are delivered ready for installation
- High-temperature repair switches optional
Chemical-proof centrifugal fans
Wolter offers a range of single-inlet centrifugal fans for conveying corrosive media in the chemical industry, especially for the central exhaust of fume cupboards or similar applications.
Fans can be direct- or belt-driven and are also suitable for outdoor installation.
The material of impellers and fan casings can be adapted according to the chemical content in the airstream. Standard materials are Polypropylene or GRP. Stainless steel versions in are available as well.
- Impeller diameters from 75mm to 1250mm
- direct- or belt-driven
- Standard materials Polypropylene, GRP and stainless steel
- Accessories include Fume Jet cowls and plenum boxes
