TPT November 2009

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Technology Update
N ovember 2009 77 ›
Our system competence for your success!
CNC tube bending machines •
1-axis-controlled • tube bending machines
Assembly machines for hydraulic tubing •
Tube inspection systems •
System solution for automated production of • template pipes
Software solutions for efficient piping •
TRACTO-TECHNIK GmbH & Co. KG · Plant 2 · D-57368 Lennestadt
Tel: +49 (0)2725 / 95 40-0 · Mail: ·
45 Years of
Experience
THE Yokogawa Rotameter RAMC
flowmeter has been certified for use in
areas with a risk of gas explosions and
dust explosions. The instrument is now
provided with Ex certificates that are valid
in Europe, America, Australia, China and
other countries.
The explosion protection for dust zones
is available for instruments with the ‘d’ type
flameproof protection in a robust aluminium
housing with the marking II 1D Ex tD A20
IP67 T1...T6 or II 2D Ex tD A21 IP67 T1...T6.
For type ‘i’ intrinsic safety protection with the
marking II 2G Ex ia IIC T6 or II 2G Ex ia IIB/IIC
Flowmeter certified for use in
potentially explosive areas
T4, the Rotameter RAMC is equipped with a
stainless steel housing. The Rotameter range
has been in use in many areas of industry for
100 years, and includes designs with glass,
plastic and metal measuring tubes. Units are
available with mechanical displays and with
additional components including transducers
and limit switches.
The FMEDA (failure modes, effects and
diagnostic analysis) assessment of the
design, carried out by test house exida,
permits operation of the RAMC even in
safety-relevant systems that have to comply
with the requirements for Safety Integrity
Level SIL1 or SIL2.
Theemphasisonsafety intheseYokogawa
products reflects the fact that, in all areas of
industry, the explosion of combustible dusts
presents a risk that is often underestimated.
According to estimates by Munich Re, there
is a dust explosion in Europe every day.
A particular risk potential exists in the
fact that even materials that otherwise are
considered non-combustible can undergo
explosion-like combustion when they are
present in the form of a dust-air mixture.
Yokogawa UK Ltd – UK
Email:
Website:
 Yokogawa’s Rotameter RAMC flowmeter is certified for use in potentially explosive areas