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Vortex pumps VK-(2G,1G), VKS-(2G,1G) and electric pump units on their base are intended for pumping neutral, short-aggressive, harmful, and highly explosive liquids with kinematic viscosity up to 36*10-6 m²/s (36sSt), with content of solids not more than 0,01% by mass and the size of particles not more than 0,05 mm, in which the materials of flow passage not permit linear speed of continuous corrosion more than 0,1mm/year as per GOST9.908-85.
Pumps are related to the items of aspect 1 (repairable ones) as per GOST 27.003-90.
Pumps and units have been designed subject to safety requirements defined by GOST R 52743-2007.
Pumps (units) have been designed with due account for the export delivery requirements as per ОСТ26-06-2011-79.
Electric pump unit consists of the pump and driving motor, mounted on the common foundation frame or plate and connected by the elastic coupling.
Pumps VK-(2G,1G) and VKS-(2G,1G) – vortex, single-stage, horizontal, cantilevered pumps.
The impeller which is a disk with radially positioned blades moves the liquid along the ring channel giving it the necessary energy.
Dimensions of the hydraulic part of the pumps are changed according to their standard size, but the pump construction is the same. The working chamber of the pump flow passage is executed in the casing and casing cover, and is a ring channel connected with the inlet and outlet pump nozzles. The suction and delivery parts of the channel are divided by a bridge (cutter-off).
The impeller is keyed on the shaft and has the possibility of free movement in the axial direction. Holes in the disk unload the impeller off the axial forces.
The pump shaft rotates in two ball bearing supports, fitted in the pump bracket.
To reduce leaks of the pumped product into the surroundings provision is made in the pump casing for the double or single end-face sea.
To ensure self-suction, the VKS pumps have the delivery hood on the outlet nozzle.
|Flow (nomin.), m³/h||14.4|
|Pump power input (max.), kW||7|
|Rotation speed, rpm||1450|
|Rotation speed, c˜¹||24|
|Pump inlet pressure, kgf/sm², max||2.5|
|Pump unit efficiency,%||32|
|Type of current||AC|
|Admissible positive suction head, m, max||6|
|Suction lift (max), m||4|
|Allowable duration of priming (max.), sec.||600|
For example VK 2/26 А - 2G U3.1 TU 26-06-1213-81 , where:
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