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Home / Pumps By Brand / Protek / Protek Hand Primers / Hand Primers Typical Installation, Operation & Troubleshooting

Hand Primers Typical Installation,
Operation & Troubleshooting

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
  1. Attach the mounting bracket to the centrifugal pump or skid.
  2. 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.
  3. 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.
  4. If the primer is connected to the pump suction, a cutoff valve is not required.
  5. 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.
  6. 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.
Troubleshooting
If you cannot get the primer to prime, try one of the following:
  1. Make sure the cutoff valve is closed. The cutoff valve should only be opened after priming to drain any liquids in the primer body.
  2. Make sure there is no debris left inside where the disk or cutoff valve is. Any debris can cause clogging.
  3. Inspect the diaphragm for any tears or cracks.
  4. Check the line for any blockage or loops. The line must be straight and not twisted in any way.
  5. Check any strainers for blockage.
  6. Check all sections of the suction for air leaks.

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