Pressure gauges with copper capillary tube ■■
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
Connection Back, with copper 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 Pointer Plastic, black or white
Window with reference pointer (RFK 28, 37, 45, 52) Special scales ■■ Dial with customer logo ■■ Other process connections ■■ Various capillary lengths ■■ Special colours for housing, dial, pointer ■■ ■■
i See page 311 for prices.
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 Cu capillary with PVC coating, R3, gray L = 500, 1,000, 1,500, 2,000 mm