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Data Sheet EXPK 944/947/953

Data Sheet EXPK 944/947/953

Product catalog summary

Overview: The document is a technical data sheet for the Trafag Ex Pressostat EXPK 944/947/953, designed for use in hazardous environments with gas and dust explosion risks. It highlights the product's applications, features, technical specifications, and ordering information.

Applications and Features: The Ex Pressostat is housed in rugged aluminum or optional stainless steel, with IP66 protection, suitable for any mounting position. It is certified for use in explosive environments (Ex d e IIC t6 Gb and Ex tb IIIC t80°C Db).

Technical Data: The measuring principle is based on a piston, with media temperature ranges from -30°C to +150°C depending on the O-ring material (NBR or FKM). The measuring range spans from 1 to 600 bar, with an ambient temperature range of -50°C to +65°C. The output signal is a floating change-over contact (SPDT), with a repeatability of ±1.0% FS.

Ordering Information: The type code specifies configurations such as with or without display and adjusting screw or knob. The pressure range options are detailed, with corresponding overpressure and burst pressure limits.

Specifications: The accuracy is ±2.0% FS, with a switching differential that varies by model. Environmental conditions include a maximum humidity of 95% and vibration and shock resistance specifications. The housing is made of AlSi10Mg with epoxy coating, and the sealing materials are NBR or FKM.

Electrical Data: The microswitch rating is provided for both AC and DC loads, with specific ratings for resistive and inductive loads. The electrical connection is via terminal screws and a cable gland.

Dimensions and Additional Information: Detailed dimensions are provided for installation, and additional documents such as data sheets and instructions are available on the Trafag website.

Catalog excerpts

Ex Pressostat Swiss based Trafag is a leading international supplier of high quality sensors and monitoring instruments for measurement of pressure and temperature. Rugged aluminium housing, option: housing stainless steel Protection IP66 Any mounting position possible Ex d e IIC T6 Gb Ex tb IIIC T80°C Db Technical Data Measuring principle Media temperature Measuring range Ambient temperature Output signal 1 Floating change-over contact (SPDT) Switching differential Areas with gaz explosion hazards: II 2 G Ex d e IIC T6 Gb Areas with dust explosion hazards: II 2 D Ex tb IIIC T80°C Db Trafag Sensors & Controls Switzerland www.trafag.com [email protected]

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EXPK 944/947/953 Ordering information/type code XXX XX XX XXX XX XX Custom build code Without display, with adjusting screw With display and adjusting knob With display and adjusting screw Standard, switching differential not ajustable Sensor material Piston 1.4435, O-Ring NBR Piston 1.4435, O-Ring NBR Piston 1.4435, O-Ring FKM Piston 1.4435, O-Ring FKM Piston 1.4435, O-Ring NBR Piston 1.4435, O-Ring NBR Piston 1.4435, O-Ring FKM Piston 1.4435, O-Ring FKM Piston 1.4435, O-Ring NBR Piston 1.4435, O-Ring NBR Thread G1/4" female G1/2" male G1/4" female G1/2" male G1/4" female G1/2" male G1/4" female...

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EXPK 944/947/953 Standard products (extra short lead time) Product No. Type Code

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EXPK 944/947/953 Specifications Accuracy Switching differential Adjustment range switchpoint Environmental conditions AlSi10Mg/ Epoxy coated Accessory 06: 1.4301 (AISI 304) Screwed cable gland Mounting torque Dielectric strength Life time (mechanical) Electrical connections Terminal screw Cable gland M20x1.5/SW24 Cable-Ø 5.5...13 mm Approval: PTB 99 ATEX 3128 X Electrical connection Storage temperature Media temperature Mechanical Data Ambient temperature Other adjustment ranges upon request Additional information Documents Data sheet Instructions Flyer

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Dimension X and Y see data sheet H72271

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EXPK 944/947/953 Switching differential typ. @ 25°C Measuring range of piston sensor Microswitch 91 Switching differential: Variable according to set point (not adjustable) Measuring range of piston sensor Microswitch 91 Switching differential: Variable according to set point (not adjustable) Electrical data switch Rating Resistive Load (Inductive Load) Type 91 Electrical connection

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

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