OJ series selfpriming sewage pumps

Design:

Upon starting the pump, pressure drop occurs at the eye of the impeller which will give rise to pressure differences within the pump system (pump casing & suction pipe) and outside the pump system. As the pressure continues to drop in the pump system, a mixture of liquid and air will start to flow into the pump due to higher atmospheric pressure outside the pump system.

The mixture of liquid and air will flow through the casing chamber designed like a diffuser through the inlet

and then to the discharge port. At the discharge port, air being lighter will be extricated through the discharge piping. The liquid being heavier will fall back into the pump chamber and re-mix with the inlet liquid. This process is repeated till air in the suction pipe and pump casing is fully emptied and filled with liquid. At this point, the pump will then be fully primed and achieve the self-priming effect.

OJ series selfpriming sewage pumps

Pumped Liquid:

Different Clean and dirty liquids of neutral or Alkali at viscosity up to 50mm2/s (cSt).

OJ series selfpriming sewage pumps

Shaft Seal:

Mechanical Seal---Sic-Sic/Vinton.

OJ series selfpriming sewage pumps

Flange Attached:

Screw Flange for size up to 4 inch

NonStandard Flange for size more than 4 inch

OJ series selfpriming sewage pumps

Technical data:                Application: 1. Industry

Flow: 4-480m3/h                                      2. Civil Enginnering

Head:4-400m                                         3. Marine Duty

Speed: 1450rpm/2900rpm(50Hz)                         4. Sewage

      1750rpm/3500rpm(60Hz)                         5. Water Treatment

Temperature: -10°C---80°C                              6. Agriculture.

Operating Pressure:  6Bar.

OJ series selfpriming sewage pumps