Gas expansion temperature switch FX
adjustableIP67IP66

gas expansion temperature switch
gas expansion temperature switch
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Characteristics

Heating technology
gas expansion
Type
adjustable
Protection level
IP67, IP66, SIL, ATEX
Temperature

Min.: -90 °C (-130 °F)

Max.: 380 °C (716 °F)

Description

Version: direct bulb or capillary Ranges: -90..+380°C Case: 316 Stainless Steel Sensing element: IP66/67 Sensing element: Stainless steel bulb and capillary Switch: 1 or 2 change over(SPDT) Options: » Stainless steel armour or PVC coated capillary » Increased safety housing (ATEX/IECEx) » Intrinsic Safety (soon) » SIL capability (soon) Working Principle The pressure or temperature is applied to the sensing element (SE), whose position then changes, acting on the flexible arm (FA). The force produced in this way is balanced by the spring (RS). This is how the set point is adjusted. As the set point is approached, the change in forces disturbs the balance (FA) and acts on the contact. A second spring (DBS) acting on the flexible arm (FA) increases the deviation of the switch(es). The force produced by the dead band spring is adjustable, and is used to offset the two contacts in the case of differential functions. The pressure switch and temperature switch scales indicated in our catalogue are values for a set point to lower the pressure or temperature. TypeS oF HouSINgS Standard housing: zamak, aluminium cover, epoxy paint coating Explosion-proof housing (RTPF): AS10G aluminium, epoxy paint coating Polyester housing (FPP) 316L/1.4404 stainless steel housing (FPX) 316 stainless steel external screws and fittings IP 66 (IP68 available as an option) IP 56 (IP66 available as an option) for diaphragm-actuated gauge pressure switch in FML, FMS, FMT type standard housing as per EN 60 529 (IEC 529)
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