What Are Single Stage Centrifugal Pumps?
Centrifugal pumps are the most common type of pump available and account for approximately 70% of pump types used and refers to one of the main three families of pumps.
A single-stage centrifugal pump consists of one impeller rotating on a shaft within a pump casing which is designed to produce fluid flow when driven by a motor. It is one of the simplest designs of pumps available and many variations in design exist to satisfy the duty requirements of applications. Impeller design is changed to accommodate clean, dirty and solid laden liquids, with several mechanical seal types to accommodate variations in applications.
The different types of centrifugal pump include:
Close-coupled - where the pump head and motor are directly connected without a coupling.
Long-coupled – where the pump and motor are mounted on a base plate and connected via a coupling.
Vertical Inline - Pump is mounted Vertically for space saving. Vertical inline pumps can be close coupled of long coupled when fitted with a spacer bracket.
Different standards exist in centrifugal pump design to define the conditions in which the pumps will operate in and also the expected design down to individual components:
DIN24255 / EN733 - A design standard incorporating set dimensions between the centre line of the inlet and outlet flanges.
ISO2858 / ISO5199 / ASME B73.1 Chemical Standard- These standards detail the dimensions between the centre line of discharge and inlet and outlet flanges, levels of vibrations, shaft deflection, and permissible forces within the pump.
API610 - A pump design typically used within the oil industry (American Petroleum Industry) containing the most stringent design standards available ensuring pump has an overhung bearing design, maximum permissible forces, service intervals, casing thickness and life span of 26 years.
There are a range of Centrifugal P&ID Symbols which can be used in Process Drawings - learn more.