Ashcroft T5500 - Construction and Function; Description of Operating Principle; Description of Components

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Device with integrated inductive proximity switch
###T5500#### I####ATEX oder ###T6500#### I####ATEX
6 Construction and function
6.1 Overview
1 Bourdon tube
2 Socket and process connection
3 Movement
4 Pointer
5 Dial
6 Window
7 Bayonet ring
8 Gasket
9 Vent valve
10 Case
11 Blow-out and compensation plug
6.2 Description of function
The sensing element, a bourdon tube (C-form or helical) that is welded to the socket, will be exposed from inside with
pressure. Under pressure the elastic tube is deflecting against the zero position. This deflection is proportional to the
adjacent pressure. The movement transfers the deflection to the pointer.
The display of the measured value is given on a 270° scale.
6.3 Description of components
6.3.1 Scale with pointer
The pressure gauge is equipped with a dial face and pointer pursuant to EN 837-1, nominal size 100 mm or 160 mm.
 Erläu ter ung, z usätz lic h ei n Hi n weis:
6.3.2 Instrument connection
The instrument connection is located on the bottom side (T5500 and T6500) or at the back side (T5500) of the
pressure gauge and is a threaded connection.
6.3.3 Vent valve