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The hand diaphragm primer contains a rubber diaphragm working in an aluminum chamber. The diaphragm is actuated by a levered handle attached to it by a connecting rod. Air is drawn into the chamber through a suction valve on the upstroke and discharged through a discharge valve on the down-stroke.
DP Series Diaphragm Hand Primers Installation and Operation Directions | |
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1 | Attach mounting bracket to centrifugal pump or skid |
2 | Connect primer suction inlet to priming port on the centrifugal pump with hose or flexible tubing. Be sure all connections are air tight. |
3 | Fulcrum bracket on the DP9 may be adjusted for ease of operation. |
4 | If primer is connected to pump discharge, a cutoff valve should be installed in the priming line. This valve should be closed immediately after priming to prevent the pump from discharging through the primer. |
5 | If primer is connected to pump suction, cut-off valve is not required. |
6 | A check valve must be used on the pump discharge to prevent air from being drawn into the pump from the discharge line while priming. |
7 | All primers are equipped with a drain cock installed in the suction chamber for draining excess water after each use. Drain cock must always be closed when primer is in use. |
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