TPi July 2015

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July 2015 Tube Products International 39
products & developments
High performance testing with Minimac 55
Magnetic Analysis Corporation
(MAC) will feature the new Minimac
55 eddy current tester at this year’s
Tube Southeast Asia show in Bangkok,
Thailand, in September. The company
will be co-exhibiting with its Thai
representative, Siam Charn Co, Ltd.
The Minimac 55 brings high-
performance eddy current testing to a
broad range of production applications.
It is the first eddy current tester to offer
the robust capabilities of MAC’s top-
of-the-line Multimac®, in a powerful,
compact design.
The instrument is suitable for dedicated,
continuous production line testing
where simple setup, without the need
for constant operator adjustment, is
desirable. Once the optimum settings
have been established, a lockout
mode feature can be set to prevent
unauthorised changes.
Defects and conditions that can be
readily detected by the Minimac 55
include finding short surface and some
subsurface defects such as laps, slivers
and cracks in tube, bar, wire and parts,
and locating weld line faults, including
short ID or OD defects. The Minimac
55 can also check continuity and locate
welds in single- and multi-conductor
insulated wire and cable and, using the
MID model, detect magnetic inclusions
such as iron filings in copper material.
The Minimac 55 features MAC’s
proprietary Multimac performance in a
single-channel instrument, with software
controls for all functions, including
phasing, filtering and sensitivity, all while
operating at speeds over 4,000fpm.
The test results are displayed in full-
colour polar and linear mode showing
real-time, true waveform signals for easy
review on a separate on-site monitor or
at remote locations. The Track screen
depicts the test product’s length, with
data on line speed, end suppression,
flaw tracking, piece count and alarm
routing.
Linear strip charts and complete test
data, as well as an unlimited number of
settings, can be stored, annotated and
recalled from a library on the internal
storage device or network. When
networked, multiple instruments can
share the same library to ensure correct
settings in multiple test lines. Setup and
monitoring can be handled through a
computer network, and reports with
customer, product information, defect
location, time, amplitude and phase
can be stored locally or on a network
server for quick follow up and quality
assurance.
MAC’s broad range of encircling and
sector test coils is available for use
with the Minimac, which can also be
configured for flaw or absolute mode,
depending on the application.
Magnetic Analysis Corp – USA
Magnetic Analysis Corporation’s Minimac 55
eddy current tester
Electro hydraulic trip throttle valve
Dresser-Rand, a global supplier of
rotating equipment solutions to the
oil, gas, petrochemical and process
industries, has launched the new
Gimpel® electro hydraulic trip throttle
valve (EHTTV).
Designed to prevent the catastrophic
failure of steam turbines, the EHTTV
stops the flow of steam to the turbine
in less than 0.3 seconds, a closing
force that is four to ten times faster
than typical latch-type valves.
Additionally, the back-seated stem
design prevents steam loss when the
valve is in the fully open position.
EHTTVs operate independently of the
installed turbine oil system and only
require electrical power to operate.
They can be locally or remotely
actuated and exercised. The valves
maintain a five-year overhaul cycle with
no lubricating requirement, and comply
with API-612 standards. They can also
be used to improve efficiency by saving
steam.
The valve underwent extensive testing
at Dresser-Rand’s facility in Burlington,
Iowa, USA, and performed as expected
under designed conditions.
EHTTVs were developed for steam
turbines in a wide range of industries,
including power, ethylene, ammonia,
pulp and paper, petrochemical, steel,
medical, education and refinery.
“Our new electro hydraulic trip throttle
valves bring a new level of performance
and efficiency to the market and are
performing very well for our clients,”
said Maged Mikhail, vice president
engineered solutions and Gimpel
SBU for Dresser-Rand. “We have an
installed base of more than 17,000
Gimpel valves and have an excellent
track record, which is why we’re now
the only trip throttle valve manufacturer
with SIL-3 certification.”
Dresser-Rand’s president and CEO,
Vincent R Volpe, presented the
Gimpel valve team with the Company
President’s Award in the technology
and innovation category during the
Dresser-Rand Worldwide Management
Meeting in March.
Dresser-Rand – USA