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Elastomer Couplings EK

Spider Couplings for Use in Hazardous Areas and Explosive Atmosphere

Design of the Servomax EX: No dimensional change to the EK standard series. The material of the hubs and the inserts will change. Hubs: In general, steel or stainless steel hubs are used. Caution: Aluminum hubs may not be used in explosive environments. Elastomer Insert: A special elastomer insert (Type D/92 Sh A) capable of conducting electricity is used. This prevents the possibility of electrostatic loads and sparks. Mounting and Sizing: All misalignment values and the transmittable torques are reduced by 30%. Maintenance: A routine inspection of the coupling must be performed. Mounting Instructions: Manuals for mounting and maintenance are provided with every EEx coupling.

ATmosphere EXplosible

The ATEX 95a is regulated by the new European directive. Generally the explosive atmosphere is classified into 3 different zones.

Zone 0:
An explosive atmosphere consisting of a mixture of air and flammable substances in the form of gas, vapor, or mist that is continuously or frequently present.

Zone 20:
An explosive atmosphere in the form of clouds of combustible dust in the air under the same conditions listed above.

Zone 1:
An explosive atmosphere consisting of a mixture of air and flammable substances in the form of gas, vapor, or mist that will occasionally occur during normal operation..

Zone 21:
An explosive atmosphere in the form of clouds of combustible dust in the air under the same conditions listed above.

Zone 2:
An explosive atmosphere consisting of a mixture of air and flammable substances in the form of gas, vapor, or mist that is not likely to occur during normal operation, but could occur for short periods of time.

Zone 22:
An explosive atmosphere in the form of clouds of combustible dust in the air under the same conditions listed above.

For zones classified as 1/21 and 2/22, the Servomax servo-insert couplings are accredited according to ATEX 95a.

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