Custom-made ventilation, pressure relief and weather protection systems in aluminium and hot-dip galvanized steel for industry.
Dipl.-Ing. Ulrich Grajecki (GmbH & Co.) KG
BargteheideNew on Amplifa
About Lafiro
Lafiro (Dipl.-Ing. Ulrich Grajecki (GmbH & Co.) KG) has been manufacturing custom-made ventilation systems for industry since 1974 at its site in Bargteheide in the Hamburg metropolitan region. The portfolio includes static and adjustable ventilation grilles, pressure relief systems and combinations of weather protection and pressure relief, supplemented by actuator motors and linear actuators with emergency positioning function. The systems are built as one-off custom production to specified dimensions from extruded aluminium (hollow and box profiles) as well as from S235 JR steel with welded frames and sheet-metal louvre blades; the surfaces are anodized (E6/EV1), powder-coated in RAL colours or hot-dip galvanized to DIN EN ISO 1461. The company supports customers in design planning with ventilation engineering data and CAD drawings. Areas of application include machine and production halls, chemical plants, warehouses, waterworks, transformer rooms and medium-voltage switchgear. Products have been tested by TÜV Nord or TÜV Süd and at the Fraunhofer Institute for Building Technology, and are checked several times for dimensions, workmanship and function before delivery.
- Site
- Bargteheide
- Processes
- Custom manufacturing of ventilation systems to specified dimensions (custom production,, Welding of frames made of rectangular tube (type LW hot-dip galvanized, joints welded on both sides), Riveting (riveted mounting brackets on the frame), Hot-dip galvanizing (dip-galvanized) acc. to DIN EN ISO 1461 (DASt guideline 022), Powder coating in any RAL colour, Anodizing (E6/EV1, anodized in natural colours), Manufacture of static ventilation systems (weather protection grilles) type LW in aluminium with, Manufacture of static ventilation systems type LW hot-dip galvanized made of S235 JR with angle
- Materials
- Extruded aluminium (hollow profile/box profile), Steel S235 JR (S235 hot-dip galvanized), Sheet metal (steel, angle louvre blades), Stainless steel (fastening screws), Plastic (bearings, bushings, holders, spacers, anchors), Closed-cell insulation material, Silicone (seals), PUR flexible foam (sealing tape/cord, mounting)
- Certificates
- Burglar resistance RC3, Burglar resistance RC4, Protection class IP 23 DH acc. to EN 60529, Burglar resistance RC3 (ift Rosenheim, PB 17-002185-PR01)
- Founded
- 1974
- Industries
- Energy industry, Machine and production halls, Chemical plants, Warehouses, Waterworks, Transformer rooms and transformer prefabricated stations (PEHLA-tested)
- 01
Consulting and design planning (ventilation engineering data, CAD drawings)
- 02
Manufacturing to specified dimensions (welding, riveting, assembly)
- 03
Surface treatment (hot-dip galvanizing, powder coating, anodizing)
- 04
Quality inspection for dimensions, workmanship and function
- 05
Delivery incl. assembly documentation
Materials and Processes
Extruded aluminium (hollow/box profile)
Frames and louvre blades of the aluminium systems; corrosion-resistant and standard anodized E6/EV1.
Steel S235 JR, hot-dip galvanized
Welded frames and sheet-metal angle louvre blades of type LW, galvanized by dip-coating to DIN EN ISO 1461.
Stainless steel
Fastening screws for mounting the elements.
Plastic
Bearings, bushings, holders, spacers and anchors for louvre bearing and mounting.
Closed-cell insulation material
Insulation of the double-skin louvre blades of the insulated pressure relief system LKF 150.
Silicone
Seals of the structural opening on the insulated pressure relief system.
Hot-dip galvanizing DIN EN ISO 1461
Corrosion protection of the steel systems after processing (DASt guideline 022).
Powder coating
Coating in any RAL colour as a supplement to the limited colour range of anodizing.
Anodizing E6/EV1
Standard surface quality of the aluminium ventilation systems in natural colours.
Site
Bargteheide
DEProduction and sales (central site)
- Lot size
- Custom production from 1 unit
- Materials
- Aluminium, steel S235 JR, stainless steel, plastic
Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Custom manufacturing of ventilation systems to specified dimensions (custom production,Assembly | – | 1200 mm (width, single-piece for various | – | 1 (custom production) | Aluminium, Steel |
| Welding of frames made of rectangular tube (type LW hot-dip galvanized, joints welded on both sides)Joining | – | – | – | – | Steel |
| Riveting (riveted mounting brackets on the frame)Joining | – | – | – | – | Aluminium |
| Hot-dip galvanizing (dip-galvanized) acc. to DIN EN ISO 1461 (DASt guideline 022)Surface | – | – | – | – | Steel |
| Powder coating in any RAL colourSurface | – | – | – | – | Aluminium, Steel |
| Anodizing (E6/EV1, anodized in natural colours)Surface | – | – | – | – | Aluminium |
| Manufacture of static ventilation systems (weather protection grilles) type LW in aluminium withAssembly | – | from 900 mm width centre mullion | – | – | Aluminium |
| Manufacture of static ventilation systems type LW hot-dip galvanized made of S235 JR with angleAssembly | – | from 800 mm width centre mullion | – | – | Steel |
| Manufacture of adjustable ventilation systems (type LWR, LKR, LDWR) manual or withAssembly | – | 1200 mm | – | – | Aluminium, Plastic |
| Manufacture of pressure relief systems (type LKF, LKRF, LWKF, LKF 150 insulated)Assembly | – | 1200 mm | – | – | Aluminium, Plastic, Stainless steel, Insulation material |
| Manufacture of combination systems weather protection + pressure relief (type LW+LKRF, LW+LKF, LWKF)Assembly | – | 1200 mm | – | – | Aluminium |
| Design planning support with ventilation engineering data and CAD drawingsEngineering | – | – | – | – | – |
| Quality inspection of products before delivery for dimensions, workmanship and function (multipleTesting | – | – | – | – | – |
Additional services
Quality
The products are checked several times for dimensions, workmanship and function before delivery. Test certificates are available, among others, from TÜV Nord or TÜV Süd, from the Fraunhofer Institute for Building Technology, from ift Rosenheim (burglar resistance RC3/RC4, DIN EN 1627-1630) and from an arc short-circuit test with TU Dresden (60 mbar); protection class IP 23 DH acc. to EN 60529.
| Evidence | Bargteheide |
|---|---|
| Burglar resistance RC3 (ift Rosenheim, PB 17-002185-PR01) | |
| Burglar resistance RC4 | |
| Protection class IP 23 DH acc. to EN 60529 |
History
- 1974
Founded by Dipl.-Ing. Hans-Ulrich Grajecki; project-specific ventilation systems under LAFIRO for the energy industry.
- 1975
Expansion of the product range with ventilation systems made of aluminium.
- 1979
Addition of manually adjustable ventilation systems to the manufacturing programme.
- 1984
Introduction of pressure relief systems made of aluminium for medium-voltage switchgear.
- 1985
Claus-Peter Grajecki takes over the company after the death of his father.
- 1998
Adjustable ventilation systems supplemented by actuator motors.
- 1999
25th company anniversary.
- 2003
Introduction of combined ventilation systems (weather protection and pressure relief).
- 2018
RC3 certification of LAFIRO System W, hot-dip galvanized.
- 2021
Introduction of the linear actuator with emergency positioning function via separate energy storage.
- 2023
RC4 certification of LAFIRO System W, hot-dip galvanized.
- 2024
50th company anniversary.