3-19
Chapter 3 Starting and Stopping this Device
(iii) Zero point check and calibration
Procedure
(1) Inject sealing liquid through the seal pot, and fill the connecting pipe with sealing liquid.
(2) Gradually open the high pressure side and low pressure side stop valves of the three-way
manifold valve and then the drain plugs, and fill the pressure-receiving part of the device with
sealing liquid.
(3) After sealing liquid flows out from the high pressure side and low pressure side drain plugs,
close the drain plugs and then close the high pressure side and low pressure side stop valves.
The device will attain a state (of equalized pressure) in which equal pressure will be applied to
the high pressure side and low pressure side of the device.
(4) Using the communicator, check the device output. If the output is not zero, calibrate the zero
point. For information regarding the zero point calibration procedure, see the operation manual
for the communicator.
(5) After finishing calibration and checking, first close the equalizer valve, and then open the low-
pressure side stop valve and drain plug, and remove the sealing liquid on the low-pressure side.
Finally, close the low-pressure side stop valve and drain plug.
(iv) Introducing process pressure and checking for leaks
In the following procedure, process pressure is introduced into the pressure-receiving part of this device.
Procedure
(1) Open the high and low pressure side master valves (see Figure 2-41), and introduce process
pressure into the connecting pipe. If the process temperature is high at this point, wait until the
connecting pipe cools down.
(2) Gradually open the high pressure side and low pressure side stop valves of the three-way
manifold valve, introduce process fluid into the pressure-receiving part of the device, and when
introduction of the fluid is complete, close the high pressure side and low pressure side stop valves.
(3) Check that there are no pressure leaks in the connecting pipes, the three-way manifold valve,
the device itself, etc.
To Next Page
Loading...
Need help?
General
