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6.0 Test – and Maintenance recommendations – NTS-PU
6.1 Test periods of the Safety Breakaway Coupler
Independently from governmental regulations, we recommend to test Safety Breakaway
Couplers at least once a year according to the test recommendations for thermoplastic,
elastomer-type hoses.
A more vigorous use requires shorter test intervals. Elevated temperatures, higher
concentrations, impurities and abrasive particles can significantly influence the corrosion
resistance in Emergency Release Couplers.
6.2 Test procedure
Test procedures are regulated by the local plant safety committee. It could involve for
example pressure test of both coupler halves or the mounted coupler, a separation test and/or
visual inspection.
The results need to be documented.
6.3 Pressure testing the coupling halves
Test both halves individually (adaptor and inline) for leakage. Mount the threaded end (flange)
of the separated halve to the test unit and pressurize the system with fluid up to the required
working pressure. Increase the pressure stepwise and check for leakage.
6.4 Pressure testing of the mounted NTS-PU
Close the coupler on one side with a blind threaded end / blind flange and fill with fluid in an
upright position. Apply the test connection and pressurize the system to the requested
working pressure. Increase the pressure stepwise and check for leakage.
6.5 Separation testing
Build in the NTS-PU in an axial fashion and trigger the separation with e.g. a cable winch. The
use of a tensile force meter is recommended.
6.6 Maintenance
The Emergency Release Couplers (breakaways) have minimal need for maintenance. All
guiding elements, o-rings and seal rings should be periodically checked for porosity as well as
for wear and tear.
Upon request, we can train the operating staff.
Spare parts for the Emergency Release Couplers (breakaways) can be ordered with the
respective part number and product identification which can be found engraved onto the
coupler.
6.7 Repairs
Repairs to the Emergency Release Couplers (breakaways) can only be performed by trained
and authorized personnel followed by subsequent testing, labeling and documentation. The
spare parts available for many years.
6.8 Cleaning
The NTS-PU needs to be thoroughly cleaned before any repair.