Centrifugal overhung pumps 2К series and electric pump units on their base are intended for pumping water in stationary conditions (except for sea water), with рН=6…9, with a content of mechanical impurities not exceeding 1% by mass and of size 0,2 mm maximum as well as other liquids similar to water in density, viscosity and chemical activity at temperature from 263 up to 393 К (from minus 10 up to +120°С).
The pumps 2К series are related to the items of aspect 1 (repairable ones) as per GOST 27.003-90 and are manufactured in climatic version U3.1 and Т2 as per GOST 15150-69.
The pumps (units are not intended for installing in explosion-and-fire dangerous premises. Pumps and units are supplied for export as per OST 26-06-2011-79.
The pumps 2К series – are centrifugal, horizontal, cradle-mounted with a gland seal of the shaft or sealing rings made of composite material.
The pump case is a cast iron casting in which the inlet and outlet branch pipes, the spiral chamber and supporting foot are executed. The inlet branch pipe is arranged along the axis of rotation, the outlet branch pipe is directed vertically upwards and is positioned in the same plane with the axis of rotation.
The impeller – is single-entry, of closed type. The supply of liquid to the impeller is an axial one.
The radial blades (impeller), relieved the axial stresses and gland pressure, are executed on the main disk.
The impeller is fastened to the shaft by fairing, fixed by self-unfastening of lock washer.
The rotor of the pump is put in rotation by electric motor through the flexible coupling with rubber-bushed studs. Two radial thrust bearings arranged in the bracket are served as rotor supports. The sense of rotor rotation – is clockwise, as viewed from the drive end.
Connection sizes of the flanges – as per ГОСТ12815-80, type 1.
|Pump models||Flow (nomin.), m³/h||Flow (max.), m³/h||Head, m||Pump power input (max.), kW||Rotation speed, rpm||Rotation speed, c˜¹||Pump inlet pressure, kgf/sm², max|
Example 2К100-80-160 U3.1 TU3631-186-05747979-2001, where :