Woodward 3171A, Руководство по эксплуатации продукта, Страница: 8 / 47

EM35MR1/3171A Gas Valve Manual 26731
vi Woodward
EM Resolvers are used in a Zone 1 or a Zone 2 ATEX classified explosive
atmosphere. These are Category 2, flameproof, type 'd' products.
For Class I, Division 1 or Class I, Zone 1 North American Applications: A conduit
seal must be installed within 45 cm (18 inches) of the conduit entry when the
EM35MR1 Actuator or EM Resolvers are used in a Class I, Division 1 or Class I,
Zone 1 hazardous atmosphere.
The surface of the gas valve is dependent upon the temperature of the fuel.
Refer to the burn hazard warning statement below for safe handling. Fuel
temperature effects on valve surface temperature must be taken into
consideration when this product is used in an explosive atmosphere.
It should be noted that the following flame paths have a maximum
constructional gap that is smaller than IEC 60079
‐
1 requires.
Flame Path Max Gap, ic (mm) Comment
Actuator Cover to
Housing Per drawing 9989
‐
4011. The max gap permitted
on this flat joint is 0.099 mm / 0.0039 inch.
Actuator Adaptor
Plate to Housing Per drawing 9989 ‐ 4011. The max gap permitted
on this flat joint is 0.099 mm / 0.0039 inch.
Resolver Cover to
Housing
Per drawing 9989 ‐ 4013. The max gap permitted
on this flat joint is 0.102 mm / 0.004 inch.
Resolver Shaft
Per drawing 9989
‐
4013. The max gap permitted
on this cylindrical joint is 0.152 mm / 0.006 inch.
Actuator Shaft
Per drawing 9989 ‐ 4011. The max gap permitted
on this cylindrical joint is 0.152 mm / 0.006 inch.
EXPLOSION HAZARD—Do not connect or disconnect while circuit is
live unless area is known to be non-hazardous.
Substitution of components may impair suitability for Class I,
Division 1 or 2 or Zone 1 or 2 applications.
RISQUE D’EXPLOSION—Ne pas raccorder ni débrancher
tant que l’installation est sous tension, sauf en cas
l’ambiance est décidément non dangereuse.
La substitution de composants peut rendre ce matériel
inacceptable pour les emplacements de Classe I,
applications Division 1 ou 2 ou Zone 1 ou 2.
The surface of this product can become hot enough or cold enough
to be a hazard. Use protective gear for product handling in these
circumstances. Temperature ratings are included in the specification
section of this manual.