5.1 In-Line-09: Register 5.1 - GEA Tuchenhagen

GEA TuchenhagenInstrumentation free of dead pocketsExample: Pressure measurementIn principle, on the subject of pressure measurement inCIP/SIP systems one can say that sealing diaphragm systemshave made their mark. Basically, we have to differenti atebetween 4 systems. The following brief description of systemdesign serves to illustrate the distinguishing characteristics ofeach of the sealing diaphragms:1. The flush sealing diaphragm with liner / groove nut asper DIN 11851This system is used extensively throughout Europe. It isinstalled using male parts (as per DIN 11851) that are weldedinto the pipe system. As demonstrated in Fig. 1. the methodproduces dead space that cannot always be cleaned withoutresidual accumulation.2. The flush sealing diaphragm with the triclampconnection from the USAThis system is used extensively throughout America. It isinstalled in the pipe circuit in a similar way to that describedabove using a weld ing socket. It is, how ever, not fixed inplace with a nut but with clamp ferrules. Dead space alsoresults here, as with the previously des cribed system.3. Tube type sealing diaphragmThe tube type sealing diaphragm is ideal for ClP/SlP, asunlike the previously described systems, no dead space iscreat ed. However, the complete unit cannot simply be weldedinto a pipe circuit, but is usually supplied together withconnect ing elements such as IDF-unions.4. The VARINLINE ® sealing diaphragmClamp ferrules are used to install pressure sensors withsealing diaphragm in the In-Line Access Unit, which iswelded into the pipe circuit. If you need to replace one ofthese instruments, you do not have to replace the completesection of piping, only the transmitter. For stocking purposes,you only need to consider measuring ranges and any specialaccessories, such as limit contacts. The pipe diameter can beignored. An additional feature is the low filling volume of theIn-Line Access Unit thus providing a negligible influence ontemperature.Fig. 1 Adaptation as per standard5 / 4Fig. 2 VARINLINE ® AdaptationAlle Maße in mm / All dimensions in mm09/2013