What Are the Purpose and Functions of Casing in Centrifugal Pump?
- Pump casings seal off the inside of a pump to the atmosphere to prevent leakage and retain pressure. It has provisions for fixing stuffing box and house packing material. Provide perfect pressure containment.
- Casing guides the liquid from the impeller.
- Casing partially converts the kinetic energy of liquid to pressure energy.
- Casing surrounds the rotor and permits installation and removal of rotors.
- Casing provides structural support for the pump or a sturdy structural connection to the pump's support.
- Casing keeps the pump and its rotor well aligned when it is under the action of piping load conditions.
- A collector can be incorporated into the case as an integral part or as a separate piece.
The efficiency of a pump depends on the type of casing used. As such, it is essential to use a casing that minimises energy loss due to eddy formation. Three common types of casing designs are in use to minimise this loss.
- Volute casing
- Vortex casing
- Casing with guide blades
