Pump Volute Casing description

The pump volute casing is the most common type of centrifugal pump. Its characteristic feature is the volute-shaped pump casing which is typical for single-stage centrifugal pumps. The pump volute casing is specially designed to constrict the fluid from the pump inlet, direct it into the impeller and then slow and control the fluid before discharge. A pump volute casing is a curved funnel that increases in area as it approaches the discharge port. The volute of a centrifugal pump is the casing that receives the fluid being pumped by the impeller, maintaining the velocity of the fluid through to the diffuser. As liquid exits the impeller it has high kinetic energy and the volute directs this flow through to the discharge. As the fluid travels along the volute it is joined by more and more fluid exiting the impeller but, as the cross sectional area of the volute increases, the velocity is maintained if the pump is running close to the design point. 

These volute casings come in two different types: single volute and double volute. In a single volute casing, the impeller discharges into one volute that wraps completely around the impeller. This type of casing features one cutwater that directs the flow of the liquid towards the discharge of the pump. Double volute casings have two cutwaters located 180 degrees apart from each other. Normally a double volute pump can be identified simply by looking down the discharge flange: a noticeable vane is located inside the nozzle that divides the inner diameter of the discharge nozzle.

Main functions

Guide the flow of liquid: The design of the volute ensures that the liquid can flow smoothly into the outlet pipe after flowing out of the impeller.
Convert kinetic energy into pressure energy: The impeller converts mechanical energy into kinetic energy of the liquid, and the volute further converts this kinetic energy into pressure energy, thereby increasing the head of the pump.
Evenly distribute pressure: The volute helps to evenly distribute the pressure of the liquid through its shape and design, reducing vibration and noise, and improving the operating efficiency and stability of the pump.

Volute Case

Features:

- Advanced hydraulic model, CAD-aided design, high efficiency and remarkable energy-saving effect.

-Can manufacture parts according to your drawings.

-Materials as follows:

1.High Chrome concentration alloy 1, Rockwell hardness HRC ≥60, high abrasion application.

2.High Chrome concentration alloy 2, Rockwell hardness HRC ≥58, high  abrasion application .

3.High Chrome concentration alloy 3,  both anti-abrasion and corrosion-resistant, can be used in PH ≥4 and cl- 20000 ppm environment.

4. Other materials according to your requirements.

Technical Specifications

- max. Machining Diameter 5000mm

- max. Casting Weight of 12 ton

Maintenance and care

Regular inspection: Check the wear and corrosion of the volute regularly to ensure its normal operation.
Cleaning and maintenance: Remove impurities and sediments in the volute to keep the flow path unobstructed.
Replace damaged parts: If the volute is found to be severely worn or damaged, it should be replaced in time to avoid affecting the performance of the pump.

Application

-Coal, mining, power and dredging and other aspects.

-Other corrosion or abrasion slurry transporting application.