Vertical pumps

Type TNP-KL vertical chemical pumps are specifically designed to handle acids, caustics or chemically contaminated fluids with or without solids. Typical applications include the chemical and metal finishing industries, steel and stainless steel pickling lines, evaporation and regeneration units, wet flue gas scrubbing downstream of waste incinerators as well as exhaust air scrubbing and scrubber effluent treatment.   

Non-metallic vertical centrifugal pumps are available for both installation inside the tank – so-called wet-end arrangement - and mounting to the tank outside wall – so called dry-end arrangement.

In wet end arrangements, the pump is flanged to the tank top via a sole plate so that the pump casing and part of the column pipe project into the fluid to be pumped.  Wet-end arrangement offers the advantage that it requires no tank connection below the liquid level so that pump tank section below the liquid level is free from openings.   A pump sump is not required. This translate into a straightforward and cost-effective pump-pump tank system.

Vertical pumps for wet-end arrangement are also known as submerged pumps.

In dry-end arrangements, the pump is mounted to the tank outside wall. The liquid pumped is sucked through a pipe connection installed below the liquid level in the tank wall.

Design features

1.) Flexible coupling connecting motor shaft to pump shaft

2.) Anti-friction bearing integrated into bearing lantern; shaft bearing capable of accommodating high loads.

3.) Column pipe with 90° elbow and flange; connection by a suitable piping union allows the column pipe and/or the discharge flange to be rotated to virtually any position. Option: Column pipe with flange or design to customer’s specifications.

4.) Steel shaft with solid plastic protection sleeve.

5.) Vertical setting depth variable in 100 mm increments (standard); intermediate setting depths possible.

6.) Volute casing, casing cover and suspension pipe made of solid plastics; high wear reserve, maximum operating reliability when handling corrosives and abrasives.

7.) Solid impeller hub ensures plastics stability even at high temperatures.

8.) Impeller: closed and semi-open designs available.

9.) Optimum hydraulic design using the latest numerical methods ensures good suction behaviour due to low NPSH requirements, minimum mechanical vibration of components, long service lives of the antifriction and plain bearings, minimized running noise.

10.) Impeller is positively locked to the shaft for reverse rotation protection 

11.) Standard motor, frame type V1 with canopy. 

12.) Low external height above, slim construction below the sole plate; TNP-KL can still be installed where conventional pump configurations face a space problem.

13.) Circular sole plate; special sole plate geometries and sole plates with additional supporting flange (tank cover) available on request.

14.1.) Contact-free type 10 labyrinth seal integrated into the sole plate.

14.2.) Single mechanical seal (option): The single mechanical seal is used when there is an above-atmospheric pressure or negative pressure in the pump tank, the fluid pumped tends to vaporize or poses an environmental hazard. Lubrication of mechanical seal by fluid pumped or external flushing source.

15.) An intermediate bearing is required for large vertical setting depths (speed-dependent) to effectively prevent shaft deflection.

16.) Plain bearing fabricated from EKasic® C. This advanced silicon carbide not only offers extreme wear resistance but is also able to cope with virtually all acids and caustics.  

17.1.) Lower plain bearing, product-lubricated.

17.2.) External flushing connection for plain bearing (option):

necessary when the fluid pumped is loaded with solids or tends to crystallize.

18.) Metallic screw connections (threaded rods and cap nuts) reliably absorb the maximum internal casing pressures arising. Corrosion protection of the threaded rods by a plastic coating; corrosion protection of the nuts by plastic caps with O-rings.

The cantilever version of our vertical non-metallic pumps, e.g. type TPC pump, without bottom bearing has good dry-running capability.  

The type TPC chemical vertical pump is a dry run-proof pump for pumping acids, caustics, chemically contaminated fluids, corrosive fluids and liquid effluents in the presence or in the absence of solids directly from pump sumps, pump tanks, storage tanks or basins. The TPC pumps is available for both wet-end and dry-end arrangement.

Dry run-proof type TPC cantilever pumps are designed for service conditions involving solids-laden acids, caustics, chemically contaminated liquid effluents or when there is a risk of prolonged dry running. Typical applications include the metal finishing industry, steel and stainless steel pickling lines, evaporation and regeneration units, wet flue gas scrubbing downstream of waste incinerators as well as exhaust air scrubbing and scrubber effluent treatment.   

Design features

1.) Flexible coupling connecting motor shaft to pump shaft

2.) Anti-friction bearing integrated into the lantern  Shaft bearing capable of accommodating high loads even in the part load range.

3.) Column pipe with 90° elbow and flange; connection by a suitable piping union allows the column pipe and/or the discharge flange to be rotated to virtually any position.  

Option: Column pipe with flange or design to customer’s specifications.

4.) Steel shaft with solid plastic protection sleeve.

5.) Standard vertical setting depths from 1000 mm to 1800 mm

6.) Volute casing , casing cover and suspension pipe made of solid plastics;  high wear reserve, maximum operating reliability when handling corrosives and abrasives.

7.) Solid impeller hub ensures plastics stability even at high temperatures.

8.) Impeller: available with closed impeller; option: semi-open impeller or vortex impeller.

9.) Optimum hydraulic design using the latest numerical methods ensures

- good suction behaviour due to low NPSH requirements

- minor mechanical vibration of the components

- long service life of anti-friction bearings

- low running noise

10.) Impeller is positively locked to the shaft for reverse rotation protection 

11.) Standard motor, frame type V1 with canopy. 

12.) Low external height above, slim construction underneath the sole plate.

13.) Circular or rectangular sole plate; special sole plate geometries and sole plates with additional supporting flange available.

14.) Sealing by double V-ring protects the bearings from dirt, liquids and vapours.

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