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Inspection, Leak detection diaphragm reinstallation, Leak detection system conversion – Pulsafeeder Pulsar Shadow User Manual

Page 45: 8 leak detection system conversion

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11.7.2 Inspection

Remove and inspect the diaphragm assembly. It may have taken a permanent convex/concave set as
a result of normal flexure and conformance to the dish-plate. This condition is normal and is not
cause for replacement. The diaphragm must be replaced if it is deformed, dimpled, or obviously
damaged.

If the diaphragms have been removed from the spacer ring, the entire assembly should be replaced
to ensure proper sealing of its components.


11.7.3 Leak Detection Diaphragm Reinstallation

1. Ensure that the critical sealing areas of diaphragm assembly, reagent head, and pump head are clean

and free from debris. Align the diaphragm assembly capillary tubes with mating holes in the seal
groove in the reagent head and position it in place against the reagent head. Ensure seating of the
diaphragm sealing ring into the mating groove in the reagent head.

2. Install the reagent head bolts and tighten in an alternating pattern to ensure an even seating force.

Torque to the values recommended in Appendix IV.

3. Apply sealing compound to the gauge/pressure switch assembly and reinstall to the upper port on the

reagent head.

4. Apply sealing compound to the fill valve assembly and reinstall to the lower port on the reagent head.

5. Open the needle valve

6. Connect a hand-held vacuum pump or other vacuum source to the vacuum port, which fits 6 mm (1/4

in.) I.D. tubing.

7. For a vacuum system, evacuate to approximately 650 mm Hg (26 in. Hg) and securely tighten

the needle valve after evacuation. Diaphragm damage or decreased flow will occur if a vacuum is
not drawn before the pump is returned to service. Refer to section 11.1 “Setup for Vacuum”.

8. Re-prime the pump head hydraulic system, see Section 7.2.2 on page 18

9. For a pressure system, see section 11.5, “Pressure System Set-up and Priming”

10. If required, test vacuum or pressure system operation.

11. After diaphragm set-up and priming, the pump is ready to be returned to service.

11.8 Leak Detection system conversion


Leak detection system conversion information can be found in Bulletin CV-LD-0203 (vacuum to pressure
system). For further conversion information and kits, please contact your local Pulsafeeder sales representative.

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