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Catalogue 7


Edition 11/2018



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