19
3-4-4. Meter bodies
External views
Although external views of meter bodies differ by models as shown in Fig. 3-1, the bracket
mounting section and instrument connection section are identical for models 11/22, 71/72,
and for models 33/44, 81/82.
[Models 11/22]
[Model 33]
[Model 44]
Bolt and nut of
cover assembly
Meter body cover
(Meter body coupled
to transmitter)
Bracket
mounting hole
Drain plug
Flange adaptor
Instrument case
Fixing-screw hole
Mounting-screw
Torque tube
Damping control
(For model 44 only.
Optional for other
models.)
[Models 61/62] Flange type
Diaphragm
Flange
(Meter body
coupled to transmitter)
Extended flange type
Flange adaptor
Bracket
[Model 71/72]
[Model 81/82]
Remote sealed capillary tube
(Meter body coupled to transmitter)
Fig. 3-3. External views of meter bodies
The meter body consists of a center body, flange cover, nuts and bolts (Fig. 4-3). As shown in
Fig. 3-4 to Fig. 3-7, the process differential-pressure is introduced from the high-pressure side
(on the right when facing the transmitter) and low-pressure side (on the left when facing the
transmitter) and exercises force onto the pressure receiving bellows through the diaphragm
and sealing liquid (silicon oil). Consequently, movements proportional to the magnitude of
pressures are conveyed to the torque tube. The torque proportional to the pressure is conveyed
by the torque tube to the input beam of the transmitting section.
