型号:TW22 品牌:WIKA 威卡 加工定制:是 wika TW22 卫生型护套 Thermowells for Sanitary Applications Model TW22 Thermowells Model TW22 with welding ball (left) and connection for VARIVENT? In-Line housing (right) Thermowells Model TW22 with aseptic connection DIN 11 864-1 (left) and Clamp connection (right) Applications Sanitary applications Food industry Beverage industry Biotechnology and pharmaceutical industry, production of active ingredients Paint-finishing systems Special Features Materials and surface finish quality in accordance with Hygienic Design standards Thermowell material of the wetted parts stainless steel 1.4435 Fully welded Combinable with Model TR22 electrical resistance thermometer, replaceable measuring insert Combinable with mechanical thermometers,temperature switches, DiwiTherm? Description The Model TW22 thermowell is used for fitting thermometers or measuring inserts to the process, and protects the sensor against harsh process conditions. The thermowell is fitted to the appropriate hygienic connection via a weld-in socket and thus mounted into pipelines and tanks. With a running nut to the connection head or display, it is possible to loosen these components and to adjust them in the desired position. In combination with the Model TR22 resistance thermometer,the connection head and measuring insert, together,can be removed. This enables the thermometer and the entire measuring chain to be calibrated, without even having to disconnect the electrical connections. The process does not need to be opened and thus the risk of contamination is minimised. Technical Data Nominal size See dimensional specification Pressure rating PN See dimensional specification Material Wetted parts: stainless steel 1.4435 (316L) Surface roughness of the wetted parts Ra < 0.8 μm (standard) Options: Ra < 0.4 μm Electropolished Ra < 0.4 μm Polished and electropolished Ra < 0.25 μm Instrument connection In combination with: Model TR22 resistance thermometer - male nut M24 x 1.5, running - option: ? NPT, fixed Model 55 and Model 73 mechanical thermometers Design 3 (union nut) - male nut M24 x 1.5, running - option: mechanial thermometers in Design S (fixed), BF 2 (running nut), BF 4 (compression fitting), BF 5 (union nut with fitting): G ? or ? NPT female thread Thermowell diameter For Model TR22 resistance thermometers - ? 6 x 1.4 mm for ? 3 mm sensors - ? 6 x 1.4 mm tapered to ? 4.5 mm for ? 3 mm sensors(fast response) - ? 4.5 mm for ? 3 mm sensors (fast response,insertion length U1: 25 mm) - ? 3 mm for ? 2 mm sensors (only for BioControl? size 25) For Model 55 and Model 73 mechanical thermometers, Model TR75 DiwiTherm?, Model TR70 temperature switch - ? 8 x 0.9 mm for ? 6 mm sensors - ? 12 x 1.5 mm for ? 8 mm sensors Neck tube length M 85 mm Others on request