Beck. The adjustable pressure switches Prescal® in Ex zones

Product catalog summary

Overview: The Beck Prescal® adjustable pressure switches are designed for use in explosive zones (Ex zones 1, 2, 21, and 22) to monitor overpressure, vacuum, or differential pressure in both liquid and gaseous media, including aggressive types. The pressure setting can be adjusted without a gauge using a scaled knob.

Specifications:

Temperature Range: -20°C to +85°C for both ambient and media.
Diaphragm Material: Options include NBR, Silicone, FKM, EPDM, with specific materials available upon request.
Electrical Rating: Maximum 100 mA / 24 VAC, 30 mA / 24 VDC.
Electrical Connection: Tab terminal or push-on screw terminals.
Protection: IP54 or IP65, depending on the protection cap used.
Life Cycle: Over 1 million mechanical cycles.

Pressure Connection Types: Various options including tube and threaded connections, with materials such as polyamide, PVDF, PPS, brass, and stainless steel.

Performance Ranges:

Overpressure: Ranges from 5 mbar to 12 bar, with varying switching differentials and maximum working pressures.
Vacuum: Ranges from -5 mbar to -700 mbar.
Differential Pressure: Ranges from 5 mbar to 50 mbar.

Compliance and Safety:

ATEX Certification: BVS 06 ATEX E 141 X, suitable for gas zones 1 & 2 and dust zones 21 & 22.
Ignition Protection Type: Ex ia IIC T4 Gb and Ex ia IIIB T135°C Db.
Conformity: Complies with EU ATEX and RoHS Directives.

Accessories: Includes various mounting brackets and protection caps with IP54 and IP65 ratings.

Warnings: Installation must comply with applicable regulations, and instructions should be read before use.

Catalog excerpts

Beck. The adjustable pressure switches Prescal® in Ex zones

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Pressure switch 901..Ex Prescal® with adjustable pressure setting for Ex zones 1, 2 and 21, 22 Application Adjustable pressure switch monitoring overpressure, vacuum or differential pressure of liquid and gaseous - also aggressive -media The switching pressure can be adjusted without a pressure gauge using a scaled adjustment knob. Temperature range Ambient and media temperature from -20°C to +85°C Diaphragm material Depending on media NBR, Silicone, FKM, EPDM For 901.8xEx Silicone, others upon request ATEX EC type examination Device category Ignition protection type Conformity Other approvals...

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