Azbil Corporation
Model
KFPA
,
KFTA
- Field Mount type Pressure Indicating Controllers
15
4: Operation
4-1: Preparations for operation
(1) Check that air piping is correctly done and there is no air leak.
(2) If a manual loader is used, turn the lever to “M” (to the extremely
counterclockwise position) to make the regulator output zero.
(3) Drain the filter and set the supply air pressure at 140 kPa {1.4 kgf/cm²}.
4-2: Pressure control
(1) Close the stop valve when starting-up the process.
(2) After inspecting the process system piping for leakage, close the blow-down valve
and open the stop valve to start-up the operation.
4-2-1: For liquid or gas measurement
(See Figure 15 and Figure 16.)
In case of the clean and non-corrosive liquid, observe the following instruments for
operation of the instrument.
(1) Open the breed valve while keeping the block valve closed. Then open the stop
valve to blow away foreign materials from inside the pressure connection tube.
(2) When the pressure connection tube is cleaned, close the blow-down valve. If the
temperature of pressure medium is high, wait until the tube is cooled off and then
open the shutoff valve to start the operation.
Figure 15 Piping for measuring liquid pressure
Carefully select the
location of pressure tap so
that measurement is not
disturbed by ventilation of
gas or sediment.
Pay caution in the case of a vertical
tube. Since, note that the liquid
pressure head affects the measured
value.
Shut off valve
Blow-down valve
Stop
valve
