Kordis pumps: cantilevered and close-coupled cantilevered for water supply engineering

«Kordis» pumps - are the centrifugal machines:

and electric pump units on their base are intended for pumping service water, as well as other liquids similar to water in density, viscosity, chemical activity with hydrogen value (рН) of 6…9, at a temperature ranging from 0 up to plus 120 °С, with a content of solid inclusions not exceeding 0,1 %, by mass and not more than 0,2 mm in size.

1. Flanges can be fabricated in compliance with the standards GOST, ISO, DIN, ASME;

The construction design of the branch pipes and flanges is rated at working pressure of up to 25 kgf /сm2 for the pumps of cantilevered and close-coupled modification, and up to 16 kgf /сm2 for the pumps of cantilevered, close-coupled modification of in-line arrangement of branch pipes.

2. Significant range of available standard sizes of the pump and technical feasibility of impeller cutting allow us to select the pump in a strict correspondence with technical requirements of the hydraulic system of the Customer.

3. Dynamically balanced impeller of closed type ensure low values of vibroactivity of the pump rotor: thus reducing service costs and saving the energy.

4. The replaceable rings of groove seals made out of up-to-date wear-resistant materials with special anti-scratch coating make it possible to diminish dynamic loads onto the rotor and pump supports and to prolong the service lifetime of the bearings and seals (Fig. 1).

5. The seal chamber allows to accommodate not only gland seals but also single end-face seals including those ones of the cartridge type (Fig. 2).

6. Impeller has been relieved against axial forces with the help of special relief holes on the rear disk of the impeller in order to decrease the load applied onto the bearings and to extend their service life (Fig. 3).

7. Energy-effective hydraulics of the flow passage has been optimized thanks to modern computer-aided design methods: thus ensuring high level of efficiency.

8. The construction design of the pump which provides for the removable rotor portion and detachable bracket of the bearing unit, make it possible to perform technical maintenance without dismantling the pump casing and inlet pipelines.

9. The shaft of rigid construction with enhanced bending strength ensure minimum values of vibration and run-out for the purpose of extending the life of the seal and bearings (Fig. 4).

10. Standard or reinforced (with service life of 100 000 hours minimum) bearings with lubrication in oil vat, including the cooling system (as an option).

The high level of unification of the main subunits of the pumps of various standard sizes and modifications significantly simplifies their technical maintenance. 

The wide range of material versions allows application of the pumps for different media, including aggressive ones.

For example: K  -  (-N) - 150 - 125 – 250 (-.1) / 269 – 220  / 4 – XXX  , where:

• К – is the type of the pump:

К      - is the horizontal, cantilevered  pump with casing mounted support
КМ  – is the horizontal close-coupled cantilevered pump with casing mounted  support
KL   – is the vertical close-coupled cantilevered pump with in-line branch pipes