11.3 LEAK DETECTION OPTION – SETUP FOR
PRESSURE
Pumps incorporating pressure leak detection are shipped from the factory with the system fully
set up to work at full pump pressure. No further setup is required. The standard factory barrier
fluid is silicone oil, if any other customer-specified media is used it must be compatible with
construction materials. The system will require proper setup after maintenance or repairs, see
section 11.5 on the following page for the proper procedure.
Figure 26
11.4 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.
The standard factory intermediate fluid is a Silicone oil. If any other customer-specified
media is used, it must be compatible with the materials of construction. Refer 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 IV)
2. Remove the pressure gauge from the housing body and replace with the straight tubing
connection supplied with the pump or conversion kit. 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.
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