Test couplings from the STAUFF Test product range are
already planned in suitable positions in the hydraulic system
during the design phase of a machine, or added at a later
stage in the course of retrofitting or upgrading.
They allow machine operators and maintenance personnel
to easily and safely connect analogue and digital measuring
and display devices for the temporary testing or continuous
monitoring of system pressure and other factors.
If required, they also allow venting of the system as well
as collecting representative fluid samples, e.g. for
analysing the degree of contamination of the fluid.
This type of connection requires no tools and can also be
carried out during operation under full system pressure
up to 630 bar / 9135 PSI (depending on the type of coupling).
The check valve (ball or poppet valve) integrated into the
test coupling opens only after connection of the
measuring and display device with suitable adapters or
test hoses, which complete the product range. This
guarantees safe sealing of the connection without any
risks of leakages or fluid escaping from the system.
During production, STAUFF test couplings are not crimped
after insertion of the internal valve components and seals
but rather closed with a threaded nipple in a fully automated
process, which secures the proper functioning of the
couplings under permanent loads.
The vibration protection feature, which prevents
self-loosening of the protective metal cap caused by
vibrations in the system, is another competitive advantage.
For the finishing of the test coupling range in carbon steel,
STAUFF relies on the STAUFF Zinc/Nickel surface coating
which has proven successful for many years. It provides
reliable surface protection – even after transport, handling
and assembly – and meets all current legal requirements.
Versions in stainless steel V2A and V4A are generally
available from stock. Alternative materials and surfaces
are available on request.
For selected types and series, independent certificates
and approvals can be provided:
Military approval for use as gas filling valves for
nitrogen accumulators by the German Bundeswehr
(Wehrtechnische Dienststelle für Pionier- und Truppengerät)
DVGW registration as test points for gas pressure control
systems, issued by the German Technical and Scientific
Association for Gas and Water