What is a Volute Liner?
Slurry pump Volute Liner is a critical wear component of slurry pumps. It forms a slurry pump chamber with a throat bush and a frame plate liner insert through which the slurry flows. Slurry volute Liner is a curved funnel that increases in area as it approaches the discharge port. It is frequently used in conjunction with a slurry pump impeller. The volute reduces the speed of the liquids while increasing the pressure of the liquids as the area of the cross-section increases. A volute liner’s primary function is to help balance the hydraulic pressure on the slurry pump’s shaft.
A volute Liner is a curved funnel that increases in area as it approaches the discharge port. It is frequently used in conjunction with impeller pumps. The volute reduces the speed of the liquid while increasing the pressure of the liquid as the area of the cross-section increases. The main function of a volute casing is to help balance the hydraulic pressure on the pump’s shaft.
So Which Impellers are the Best for Slurry Pump Application?
The impeller is a critical component of your centrifugal pump. Depending on your application, impeller selection can have a significant impact on pump performance. Because of their abrasive nature, slurry applications can be especially taxing on your pump’s impeller. You must select the proper impeller for your process in order for it to run efficiently and last.
Impeller Type
In slurry applications, any type of impeller can be used, but open impellers are more common because they are less likely to clog. Closed impellers typically do not perform well with solids and are difficult to clean if clogged. For example, small fibers in paper stock may have a tendency to clog the impeller at high densities. Pumping slurry can be difficult, and a clogged pump should be avoided at all costs.
Impeller Size
To ensure that the pump’s impeller can withstand abrasive wear, its size must be considered. Slurry impellers are typically larger in size than pumps used for less abrasive liquids. The more “meat” an impeller has, the better it will perform when pumping harsh slurry mixtures. Consider the pump’s impeller to be the offensive line of a football team. These players are typically big and slow. They are beaten up repeatedly throughout the game, but are expected to withstand the abuse. Small players are undesirable in this position, just as a small impeller on a slurry pump is undesirable.
Impeller Speed
Choosing your impeller has no effect on the life of your impeller. It is critical to find the sweet spot that allows the pump to run as slowly as possible while still keeping solids from settling and clogging. Due to its abrasive nature, slurry can quickly erode the impeller if you pump too fast. This is why, if possible, a larger impeller should be chosen.
When dealing with slurry, you should generally go bigger and slower. The thicker the impeller, the more durable it will be. The slower the pump, the less wear and tear on the impeller. When dealing with slurry, the impeller isn’t the only thing to be concerned about in your pump. Most of the time, tough, long-lasting building materials are required. Slurry applications frequently use metal liners and wear plates.
Main Applications:
- Heavy Mining
- Mineral Processing
- Sand and Grave
- Coal Prep
- Cyclone Feeds
- Aggregate Processing
- Fine Primary Mill Grinding
- Chemical Slurry Service
- Tailings
- Secondary Grinding
- Industrial Processing
- Pulp And Paper
- Food Processing
- Cracking Operations
- Ash Handling
- Pipeline Transport
- High Velocity Hydraulic Transport
- Food Processing
- Explosive Sludge In Metal Smelting
- River And Pond Dredging
- Heavy Refuse Removal
- Larger Particle Or Low NPSHA Applications
- Continuous (Snore) Sump Pump Operation
- Abrasive Slurries
- High Density Slurries
- Large Particle Slurries
- Sump Drainage
- Wash down
- Floor Drainage
- Mixing
- Iron Ore
- Cooper
- Diamond
- Alumina
- Coal
- Gold
- Kaolin
- Phosphorite
- Steel
What is the Purpose of Volute Casing?
The volute casing is designed to guide the flow out of the impeller and convert the kinetic energy of the fluid flow into static pressure. It also collects the fluid discharged from the impeller and routes it to the discharge nozzle (also see Pump casing).
What are the Different Types of Pump Casing?
Pump casings are classified into two types: volute and diffuser. The goal of both designs is to convert fluid flow into a pressure-controlled discharge. The impeller in a volute casing is offset, resulting in a curved funnel with increasing cross-sectional area towards the pump outlet.
Volute Vs. Diffuser
Diffusers are distinguished by a network of radially symmetric diffusing passageways that surround the impeller. In conjunction with the diffuser, a volute-shaped or annular collector is used. Depending on the pump configuration, volutes are typically defined by one or two scroll-shaped diffusing passageways.
A diffuser type design is usually more expensive to produce for a single stage centrifugal pump because the diffuser ring is an extra part plus some incremental added machining for the casing. To transport the flow from the diffuser to the discharge nozzle, the casing must still function as a collector. Whatever method is used, the diffuser has little comparative advantage in the size of a single-stage pump.
When compared to a volute, diffuser designs are frequently more efficient at the best efficiency rate of flow. A custom diffuser can also be made for each application to maximize efficiency at a specific duty point.
A proponent of the volute may argue that the diffuser is less efficient at off-peak flow rates, where the pump will be running for the majority of the time. The efficiency differences may not be significant, and unless large amounts of power are involved, these debates rarely carry much weight in relation to competing pump prices or user preference for volute or diffuser.
A non-uniform circumferential pressure distribution causes radial thrust on the impeller. The stator design is critical in this regard. A diffuser/collector arrangement can provide a lower magnitude of radial thrust in some applications, particularly with a single-stage overhung impeller type pump that will operate continuously at flows significantly away from its Best Efficiency Point flow.
Pump stator selection has generally been rationalized by manufacturers based on market needs, application requirements, and production costs. Any decision about which diffuser or volute to use should be made in the context of specific pump types, applications, and manufacturer product offerings.
What is High Chrome a05 Slurry Pump Volute Liner?
Slurry pump material A05 is a common material used by Slurry pumps. The material’s code is A05, and it’s also known as High Chrome 27% or KmTBCr27, and US ASTM-A532.
Erosion-resistant white iron is the material of choice.
A05 high chrome alloy impellers can be used to pump liquids in a variety of industries, including the pharmaceutical, perfume, dairy, and canning industries, among others. The centrifugal pump impeller should be chosen based on the engine power. Motor impellers are also used as distributors.
Because they can contain small particles found in liquids, pool impellers are ideal for pumping emulsions. The adapter shaft is connected to the impeller blade, which has a separate hole for liquid suction. Another type of impeller in our wholesale a05 high chrome alloy impeller collection is the axial flow impeller. This type of impeller provides top-to-bottom circulation and converts the majority of energy into a flow.
General Information
High Chrome 27% is a wear-resistant white iron that performs well in erosive environments. The alloy can be used effectively in a variety of slurry types, including mine slurry, power plant slurry, industrial waste, and so on.
High Chrome 27% has a high wear resistance as a slurry pump material due to the presence of hard carbides within its microstructure. High Chrome 27% is ideal for applications requiring mild corrosion resistance as well as erosion resistance.
Physical characteristics
- 7500 g/m3 density
- 650 hardness (HBW 10/3000)
- Tensile strength (MPa) = 780
- Young’s modulus (GPa) is 220.
- Elongation at the break (%) 0.4
- (J) 190
Chemical Tolerance
In general, High Chrome 27% is not suitable for highly corrosive duties. The alloy can be used in mild corrosive applications with a pH range of 5 to 12, such as silica and nitric acid or sodium hydroxide.
High Chrome Parts Availability: 27%
The majority of wet-end slurry pump wear parts can be manufactured in High Chrome 27%. Slurry Pump Impellers, Throatbush, Volute Liners, Frame Plate Liner Insert, Casings are the most common parts.
Application Suggestions
Pumping a wide range of mild corrosive slurries is possible with High-Chrome 27%. The alloy has very good wear life for a wide range of particle sizes and harnesses. High-Chrome 27% is typically the most cost-effective material for particles larger than 100um in size.
What is A05 Material?
A05 is a “near eutectic” alloy due to its moderate chromium carbide content. This provides an excellent balance of hardness and toughness, making it suitable for general-purpose pumping applications as well as applications involving very large solids – up to 300mm in size.
If you have any questions about pumping slurry or pump sized for your slurry application, please contact us any time.
