Pulsafeeder PulsaPro 900 EN - Manual (Page 49)

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Pressure System Set-up and Priming
If the pressurized leak detection system is opened to the atmosphere during maintenance
or inspection, the system must be re-primed properly to avoid diaphragm damage and
ensure proper leak detection operation and system performance.
T HE STANDARD FACTORY INTERMEDIATE FLUID IS S ILICONE LD. I F ANY OTHER
CUSTOMER - SPECIFIED MEDIA IS USED , IT MUST BE COMPATIBLE WITH THE MATERIALS
OF CONSTRUCTION . R EFER TO THE FLUID MANUFACTURER ’ S LITERATURE FOR
APPROPRIATE SAFETY PRECAUTIONS .
Use the following procedure to set-up the pressurized leak-detection system:
1. Complete re-assembly of the diaphragm, reagent head, and external components. Ensure
that reagent head and tie-bar bolts are tightened according to the appropriate torque
specifications (consult Appendix III)
2. Remove the pressure gauge from the housing body and replace with the straight tubing
connection supplied with the pump. Connect a vacuum supply (hand vacuum pump) to the
tube fitting.
If the system was previously sealed, you may need to remove the plug and re-install the
hose fittings at the fill port. There should be a container in the vacuum line to trap excess
barrier fluid. An inexpensive automotive brake bleeding kit is appropriate for this
purpose.
3. Connect the fill tube to the fill valve tube connection. Any short length of the appropriate
sized tubing may be used for this purpose.
4. Open the fill valve.
5. Place the fill tube into a container of the barrier fluid being used.
6. Apply vacuum, the fluid should rise into the fill tube and enter the system.
7. Observe the fluid at the exit (vacuum pump) side. When clear, air free fluid is observed,
close the fill valve, while maintaining the vacuum on the system to begin the process of
drawing out excess fluid.
If you are re-using a previously installed diaphragm, it will take time for the Silicone LD
fluid to migrate through the system, be patient!
8. Release the vacuum, and remove both the fill tube and the vacuum pump from the fittings.
9. Empty the fill tube of fluid, and place it on the fitting near the switch, extending upwards, and
open to the atmosphere.
10. Ensure that the eccentric box of the pump has been filled to the appropriate level with the
correct hydraulic fluid.
11. Adjust the pump to the zero stroke (0%) position.