E Series, self-priming, centrifugal pumps are used for dirty water applications. These pumps use re-circulation of liquid in the pump casing to remove air from the suction line, enabling the pump to draw liquid through the suction line. These pumps are also available with a petrol or diesel engine.

 

APPLICATIONS

 

FEATURES

INDUSTRY

• Transfer: clean, dirty, containing sand in suspension, muddy, neutral, alkaline, acidic liquids; low viscous petroleum products, solvents even if dirty; milk of lime, caustic soda; washing, cooling, recirculation, smoke scrubbing 

• Treatment: pumping polluted, hot or corrosive waste water containing sand, mud or solids in suspension; dosing neutralising liquids; pumping out settled sludge

• Naval: loading and unloading; bilge pumping; washing, fire-fighting, stripping, sanitary duty and circulation

• Agriculture: surface irrigation; liquid manure oxygenation; transfer and spraying liquid manure or fertilisers; distribution of liquid animal feed; transfer of must; washing. 

CONSTRUCTIONS

• Drainage of excavations, canals or ponds

• Ground water dewatering with drains

• Water supply from wells or canals

• Washing concrete castings and aggregate

• Recirculation of bentonite and drilling mud.

SAFETY

• Drainage after flooding or terrential rains

• Emergency duty: temporary sewage pumping; fire fighting; recovery of dangerous liquids. 

Operating principle: drive

Founded on the natural repulsion of magnets, the magnetic drive is a power transmission without any physical contact between the engine and operating unit. The magnetic cores are keyed on to the drive shaft and impeller shaft respectively. A containment element is placed between the two cores, sealing the mechanical pumping unit. This means there is no way the liquid can escape. The system is a synchronous one, i.e. both the driving and driven shaft have exactly the same rotation speed.

 

Operating principle: J-TRM pumps

Air (yellow arrows) is drawn into the pump by the vacuum produced as the impeller rotates and is emulsioned with the liquid (blue arrows) contained in the pump casing. The air/liquid mixture is driven into the priming chamber where the air, which is less dense, separates out and vents through the delivery line while the liquid, due to the higher density, falls back and is recirculated. When all the air has been evacuated from the suction line, the pump primes and operates like a normal centrifugal pump. It can also handle a mixture of air and liquid. The check valve mounted in the pump suction port serves two purposes: it prevents the liquid from draining out of the suction line when the pump is not in operation, and if the suction line is drained by accident, enough liquid is retained in the pump casing for the pump to reprime. The delivery line must allow the air drawn from the suction line to vent to atmosphere.

Varisco ST-R series pumps are recirculating self-priming pumps suitable for handling liquids with large solids in suspension. They are mounted above and out of the liquid to be pumped, enabling inspection and maintenance of the pump, drive and motor  with greatly reducing health and safety hazards for maintenance personnel. The special design of the volute enables the pumps to prime and reprime automatically even without check valves. If the impeller should be clogged by rags or stringy materials, the large front cover can easily be removed to provide full access for inspection and maintenance. The entire rotating assembly can be removed from the pump casing without dismantling the pipes. Varisco ST-R self-priming trash pumps are your best choice for difficult pumping applications: solid construction, easy installation and maintenance, replaceable wear parts. They feature both front and rear wear plates, protecting both the impeller and the seal housing from wear and reducing overall maintenance costs.