CATALOGUE 2010/11 - Grundmann Beschlagtechnik GmbH

Fittings | Materials, Maintenance
Aluminium
Aluminum is a light metal and can be cast in moulds or
rolled in sheets to the finest foils.
We offer aluminum fittings in the surfaces, polished
aluminum (POL), as well as in the anodized surfaces,
satined aluminum silver anodized (F1-SAT) and anodized
aluminum German silver (F2).
Polished aluminum
Polished aluminum fittings are ground and then polished
to a high gloss after the casting process, or after
the shaping process in the case of sheets, and we work
with increasingly fine grinding and polishing wheels
to achieve a texture depth that is as low as possible.
The surface becomes smooth and glossy through this
process.
Aluminum surfaces polished to a high gloss form a
natural oxidation coating (matte grey color) after longer
use that protects the surface (except from mechanical
effects).
Anodized aluminum
ELECTROLYTIC OXIDATION of ALUMINIUM
For anodized oxidation of aluminum, also referred to
as the eloxal process, the surface of the aluminum
workpiece is converted to an oxide coating in an electrochemical
process. This coating can be defined in its
thickness and makes products treated in this manner
wear-resistant and resistant to corrosion, which is not
the case with polished aluminum surfaces. In addition
it also allows the possibility of implementing colors (for
our F1-SAT, F2 fittings).
However the surface of aluminum fittings with
polished or anodized surfaces can be mechanically
damaged in daily use by harder materials. Scratches
from rings or key chains are often the cause of damage.
Under some circumstance such damage to the aluminum
surface can impair the appearance; however it
cannot impair the function of the fitting.
Powder coated aluminum
Powder coating is an environmentally friendly process.
The powder coating is applied through electrostatic
charging. In the subsequent burn in process the
powder particles are networked at a temperature
of approximately 200°C. After cooling the surface is
immediately ready for use. Due to the system-based
higher coating thickness there is good resistance to
mechanical stress.
All of our fittings can be powder coated in standard
RAL colors (see page 27), as well as in other RAL colors.
Brass
Brass fittings are manufactured in the forging or
casting process. A precisely defined copper-zinc alloy
ensures high quality.
Untreated brass surfaces tend to quickly develop a
patina, which is why we offer our brass fittings in the
finish „Brass high gloss polished and enameled“ with
the catalogue designation „MS“. In this regard however
we must point out that particularly outdoors, due to
weather influences and mechanical damage, the paint
coat can be damaged. Consequently we also offer the
surface finish „Brass high-gloss polished unpainted“
(„MS-N“) as an alternative, which develops a much
desired patina or „Brass zirconium nitride“ („MS-PVD)
that is virtually indestructible.
In the version „Brass high-gloss polished unpainted“
(„MS-N“) the surface is given a tarnish prevention
treatment for delivery. This is similar to a transparent
lacquer; however it can be easily removed. To remove
this coating, moisten a soft cloth with solvent and wipe
off the fitting so that no sealing remnants remain. Now
the fitting can form a uniform patina.
PVD hard coatings
With our polished brass fittings (MS-POL) and polished
stainless steel fittings (E-POL) we offer you the possibility
of a PVD hard coating.
We use a cathodic sputtering process supported in a
magnetic field to apply coatings with extreme bonding
strength that are particularly resistant to corrosion and
oxidation.
The versions, brass zirconium nitride coated (MS-
PVD), and stainless steel PVD brass color coated (E-MS-
PVD), are examples of these highly abrasion resistant
hard coatings that are particularly well suited for
outdoor implementation, thanks to their UV-resistance
and resistance to corrosion.
Stainless steel
Stainless steel as a material is outstanding for door
fittings and window pulls, both indoors and outdoors,
due to its resistance to corrosion.
Stainless steel fittings are particularly well suited
for all high traffic doors, such as those in public buildings,
hospitals, schools, kindergartens, or in sport
facilities. Even under the heaviest continuous use the
material hardly abrades at all, nor does it show traces
of mechanical damage, such as scratches and impact.
Due to the alloy components nickel and chrome, fittings
made of stainless steel are very easy to maintain.
A chrome-nickel steel is used for WG fittings with a
material quality in accordance with DIN 17 440, material
no. 1.4301 for lever handles, backplates, and roses.
Maintenance instructions
Our fittings are generally maintenance-free.
We recommend to retight all attachment screws
and to control the attachment screw of the lever handle
after 4–6 weeks or before putting into service. You
can compensate a decrease of the door leafs (in case
of wooden doors) as well as mounting tolerances or
bracings (loosenings).
Likewise we also recommend you to check the
firm seating of the screws once or twice a year, and
to tighten them if necessary.
Agents
To maintain fittings we recommend that only mild
cleaning agents (e.g. suds) are used. In no case should
aggressive cleaning agents, scouring powders, solvents
or thinners be used.
Additionally we recommend you to check all fastening
screws including those of the lever handle and to
tighten if necessary.
Mounting
Correct mounting can only be guaranteed when using
our drilling templates (see accessory program).
The advantages
– correct mounting
– full warranty
– rapid mounting time
Precise boreholes provide support for the mounting
components and therefore the entire fitting. Mounting
is faster and also less expensive. Drilling templates are
delivered in a plastic case and, for easier identification,
have a coloured powder coating.
Please note our mounting instructions as well.
Fittings for Gates
If fittings are used for door leafs that exceed the
guidelines of the ÖNORM B 5330 and B 3850 in their
dimensions and requirements, and therefore fall in the
section of „Gates“ or special door constructions, please
contact the supplier to discuss details.
34 Grundmann | Fittings | Introduction