J Range - Surface Mounted Centrifugal Pumps
The J Range of surface-mounted centrifugal pumps feature an open impeller and rapid self-priming action.
These pumps have a large diameter for reliable solids handling, with replaceable wear plates, easily opened inspection covers and externally lubricated mechanical seals for simplified maintenance.
Product Information
J Range - Surface Mounted Centrifugal Pumps
Self-Priming Principle
The air (yellow arrows) is drawn into the pump due to the negative pressure created by the moving impeller and is emulsified with the liquid (blue arrows) contained in the pump casing.
The air-liquid emulsion is forced into the priming chamber where the lighter air is separated and leaves through the discharge pipe; the heavier liquid drops back down into circulation. Once all of the air has been expelled from the suction pipe, the pump is primed and works like a normal centrifugal pump. The pump can also work with an air-liquid mixture.
The non-return valve has a dual function: it prevents the suction pipe from emptying when the pump is off; in the event of accidental emptying of the suction pipe, this holds a sufficient amount of liquid in the pump casing to prime the pump.
The discharge pipe must be free to expel the air coming from the suction pipe.
Features
- Heavy-duty casing in cast iron, bronze or stainless steel
- Easily opened priming, drain and impeller inspection covers (Not available for J1-160 / 2-200 / 3-100 / 4-100 Models)
- Ductile iron, aluminium bronze or stainless steel semi-open impeller for handling large-diameter spherical solids
- Easily replaced cast iron, abrasion resistant rubber faced cast iron, bronze or stainless steel wear place(s). (Not available for J 1-160 / 2-200 / 3-100 / 4-100 Models)
- Externally lubricated mechanical seal. Can run dry on high vacuum even when pumping highly abrasive liquids
- Silicon or tungsten carbide seats (graphite rotating seat for versions for petroleum products)
- Double or cartridge seats available on request
- Bearing housing with heavy duty bearings suitable for direct or v-belt drive
- Standard diameter shaft extension bored and tapped to facilitate the assembly of couplings or pulleys
- Double or cartridge seals available on request
Benefits
- Rapid self-priming without foot valve. Once filled with water, the pump is automatically primed to a height of 7.5m
- Semi-open impeller allowing the passage of wide solid bodies and easy inspection
- High resistance to abrasive liquids: the wear plate is easily replaceable
- Axial mechanical seal lubricated from the outside: no leaks or infiltration of air along the shaft
- Easy to install: only the suction pipe needs to be immersed in the liquid. The pump can be located above and in a dry place, in the most suitable location for service and control
- Long life: the parts subject to wear can be easily replaced, several times, restoring the original performance of the pump