What is a VS6 pump?

[ayush842001]

What is a VS6 pump? where and why it is used? what are its advantages and disadvantages? What are the calculations involved in selection of this type of pump. what all needs to be taken care while evaluating the vendor offer

[Han Ah kwang]

[link Point to another website Only the registered members can access]

[ivu]

Double-casing difusser and vertically suspended (see API610).

Typically used for low NPSHa applications, where the suction vessel is at ground level.
With this VS6 design you only need to drill a well for the installation of the pump, which will have the hydraulics at the lowest point, ensuring adequate NPSHa. If you wanted to use a cheaper horizontal pump you would need to dig a cellar a little bit deeper than the well, which would ruin your savings on the pump.
For instance: condensate pumps in a power plant, pumping saturated fluid from a condenser located at ground level.
For the calculations just make sure that you and the vendor are both refering to the same reference level. The vendor curves are normally refered to the hydraulic of the pump i.e. at the bottom and not to the suction nozzle. In this case they should give you information about the pressure drop inside the pump, specially for the suction.

[ivu]

Double-casing difusser and vertically suspended (see API610).

Typically used for low NPSHa applications, where the suction vessel is at ground level.
With this VS6 design you only need to drill a well for the installation of the pump, which will have the hydraulics at the lowest point, ensuring adequate NPSHa. If you wanted to use a cheaper horizontal pump you would need to dig a cellar a little bit deeper than the well, which would ruin your savings on the pump.
For instance: condensate pumps in a power plant, pumping saturated fluid from a condenser located at ground level.
For the calculations just make sure that you and the vendor are both refering to the same reference level. The vendor curves are normally refered to the hydraulic of the pump i.e. at the bottom and not to the suction nozzle. In this case they should give you information about the pressure drop inside the pump, specially for the suction.

[ayush842001]

thanks for the replies. Please share calculation sheet for the vertical pumps or any bid evaluation sheet. also share when should we add the static head (from the impeller to top of mounting flange) with the differential head to get the bowl head.

[ivu]

The pumps' datum is a horizontal plane which serves as the reference for head measurements taken during test. The datum is the eye of the first stage impeller.

[link Point to another website Only the registered members can access]

[ivu]

The pumps' datum is a horizontal plane which serves as the reference for head measurements taken during test. The datum is the eye of the first stage impeller.

[link Point to another website Only the registered members can access]