Rotameter certified for use in dust zones
A
Yokogawa product story
Edited by the Engineeringtalk editorial team
Jun 19, 2009
The Yokogawa Rotameter RAMC flowmeter has been certified for use in areas with a risk of gas explosions and dust explosions.
The instrument now comes with many 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 T4, the Rotameter RAMC is equipped with a stainless-steel housing.
The Rotameter range 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 1 or 2.
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