Hand Primers Typical Installation,
Operation & Troubleshooting
THE HAND DIAPHRAGM PRIMER contains a rubber diaphragm working in an aluminum chamber. A levered handle attached to it by a connecting rod actuates the diaphragm. Air is drawn into the chamber through a suction valve on the up-stroke and discharged through a discharge valve on the down-stroke. The primer body is of a lightweight aluminum alloy. The diaphragm is of a molded rubber, extremely tough and longwearing. A rubber air discharge valve, built into the diaphragm, provides a positive seal along with easy discharge of air and water.
Installation & Operation
- Attach the mounting bracket to the centrifugal pump or skid.
- Connect the primer suction inlet to the priming port on the centrifugal pump with a noncolapsable hose or flexible tubing. Be sure all connections are airtight.
- If the primer is connected to a pump discharge, a cutoff valve should be installed in te priming line. This valve should be closed immediately after priming to prevent the pump from discharging through the primer.
- If the primer is connected to the pump suction, a cutoff valve is not required.
- A cutoff valve must be used on the pump discharge to prevent air from being drawn into the pump from the discharge line while priming.
- All primers are equipped with a drain cutoff installed in the suction chamber for draining excess water after each use. The drain cutoff must always be closed when the primer is in use.
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Troubleshooting
If you cannot get the primer to prime, try one of the following:
- Make sure the cutoff valve is closed. The cutoff valve should only be opened after priming to drain any liquids in the primer body.
- Make sure there is no debris left inside where the disk or cutoff valve is. Any debris can cause clogging.
- Inspect the diaphragm for any tears or cracks.
- Check the line for any blockage or loops. The line must be straight and not twisted in any way.
- Check any strainers for blockage.
- Check all sections of the suction for air leaks.
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TIMES