What is the function of the 3 opening nozzles on the pump body of a self-priming pump?
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This post was last edited by henjuese on 2017-4-20 at 14:42. Dear sea friends, what is the purpose of the three openings on the self-priming pump shown in the attached image? Regarding “Nozzle-3”, the manufacturer’s instructions state that “It is recommended to install a pipe connecting the casing NOZZLE-3 to the seal chamber or gland. The purpose of this line is to keep the seal faces wet during the priming cycle.” The manufacturer responded as follows: “Nozzle 1 should be filled with water before starting the pump; only water is injected first and then the nozzle is plugged. Nozzle 2 is used for draining water from the casing – it helps to empty the water inside the casing when the pump is being repaired. Nozzle 3 is a mechanical auxiliary device; it can be plugged up.””
1: Fluid filling port 2: Fluid discharge port 3: Unknown
Guess that 3 is the reserved port for pressure measurement points
No, please refer to “It is recommended to install a pipe connecting the casing NOZZLE-3 to the seal chamber or gland. The purpose of this line is to keep the seal faces wet during the priming cycle”"
The English meaning is for cooling the sealed chamber.
1: Fluid injection port 2: Drainage port for the inlet chamber 3: Drainage port for the outlet chamber
The self-priming pumps I’ve seen only have filling and discharge plugs~~that are 1 and 2 in the picture above~~I’m not sure about 3~~you’ll need to ask the manufacturer~~