Azbil Corporation
Model
KFPA
,
KFTA
- Field Mount type Pressure Indicating Controllers
13
3-4: Temperature element
The temperature element consists of a heat sensing section, a capillary section and a
displacement converting section. Entire system is compensated for ambient
temperature change.
(1) The capillary and an armored tube covering it shall have a bending radius of 60 mm
over to avoid excessive stress.
(2) Select proper type of the heat sensing element depending on the condition of
measured fluid and the type of process vessel.
(3) To measure temperature of a fluid flowing in a process pipe, locate the heat
sensing section in the center of the pipe and along the fluid flow whenever
possible.
~Note
Pay attention to the mounting method and the inserted length of the
sensing bulb (protecting tube) so that no abnormally large force is
applied to it, in case where measured fluid of 400
°
C or more has higher
viscosity, where flow rate exceeds 3 m/sec., or where Carman’s vortex is
generated.
Figure 14
Sensing bulb
Thermal insulation
Mounting boss
Capillary
tubing
Capillary
tubing
Capillary
tubing
Lead pipe
Lead pipe
Lead pipe
1 inch or 3/4 inch R(PT)
1 inch or 3/4 inch R(PT)
1 inch JIS 10K - 25 mm flange
φ
6.5
φ
6.5
φ
6.5
(A) Union-connected bulb
(A) Union-connected bulb
(B) Union-connected bulb with well
(B) Union-connected bulb with well
(C) Flange-connected bulb with well
(C) Flange-connected bulb with well
