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Bourdon tube

Pressure gauges

Pressure gauges with plastic capillary tube ■■




Technical specifications

Ideal for boilers and burners, especially for wall-mounted boilers Corrosion-resistant, highly impact-resistant plastic housing Many customised versions available

For gaseous and liquid media which are not highly viscous, do not crystallise and do not attack copper alloys and plastic. For measuring gas or vapour, these gauges must be used in accordance with the table "Selection Criteria as per EN 837-2" (see appendix)!

Type D1 Nominal size 26 – 28 – 37 – 40 – 42 – 52 – 45 x 45 Accuracy class (EN 837-1/6) 4.0 Ranges (EN 837-1/5) 0/4 bar 0/6 bar Application area Static load: ¾ x full scale value Dynamic load: 2/3 x full scale value Short-term: full scale value

Standard version

Connection Back, with plastic capillary Brass disk G1/4B Measuring element Bourdon tube, copper alloy "C" type tube Movement Brass Dial Plastic (ABS), white or black Dial marking black

Operating temperature range Medium: Tmax = +80 °C Ambient: Tmin = -20 °C Tmax = +70 °C Temperature performance Indication error when the temperature of the measuring system deviates from the normal temperature of 20 °C: Rising temperature approx. ± 0.4 %/10 K Falling temperature approx. ± 0.4 %/10 K of full scale value


Degree of protection IP 32 (EN 60529)

Housing Plastic (ABS), white, black or grey Highly impact-resistant and corrosion-resistant RFK 26, RFK 28 = Plastic (PA6) glass-fibre reinforced Window Clip-in plastic, transparent RFK 52 with bezel Capillary length Plastic capillary, R3, black L = 500, 1,000, 1,500, 2,000 mm

Pointer Plastic, black or white


Window with reference pointer (RFK 28, 37, 45, 52) ■■ Special scale ■■ Dial with customer logo ■■

Other process connections Various capillary lengths ■■ Special colours for housing, dial, pointer ■■ ■■

i See page 314 for prices.



AFRISO Catalogue Domestic Technology 2019/20  

AFRISO Catalogue Domestic Technology 2019/20  

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