Investment Casting Impeller

What is an impeller? The impeller is an energy supplying device. It is a rotating component of a centrifugal pump. It consists of a number of curved blades. Its main function is to transfer the mechanical energy of the motive force directly to the liquid to increase the static pressure of the liquid.

The manufacturing methods of the impeller mainly include sand casting, precision casting, welding, etc. The performance of the impeller size, shape, and manufacturing precision is greatly affected.

Investment casting impellers are the most advanced now. JC Casting is a China impeller investment casting foundry and supplier.


Impeller types

Impeller design is the most significant factor for determining the performance of a centrifugal pump. A properly designed impeller optimizes flow while minimizing turbulence and maximizing efficiency. Impeller casting has 3 main types: Open impeller. Semi-open impeller. Closed impeller.

Open impeller Semi-open impeller Closed impeller.
Open casting impellers have the vanes free on both sides. Open impellers are structurally weak. They are typically used in small-diameter, inexpensive pumps and pumps handling suspended solids. The vanes are free on one side and enclosed on the other. The shroud adds mechanical strength. They also offer higher efficiencies than open impellers. They can be used in medium-diameter pumps and with liquids containing small amounts of suspended solids. Because of the minimization of recirculation and other losses. It is very important that a small clearance exists between the impeller vanes and the casing. The vanes are located between the two discs, all in a single casting. They are used in large pumps with high efficiencies and low required Net Positive Suction Head. The centrifugal pumps with closed impellers are the most widely used pumps handling clear liquids. They rely on close-clearance wear rings on the impeller and on the pump casing. The closed impeller is a more complicated and expensive design not only because of the impeller, but the extra wear rings are needed.

Impeller Materials

According to the Impeller applications, the impeller can be made of cast iron, cast steel, stainless steel, aluminum, fiberglass, plastic. The main material of the pump impeller casting is gray iron 250, stainless steel, and ductile iron 450. The main use of daily life is SS304 and SS316.

In JC investment casting impeller foundry, the cast iron impeller and stainless steel impeller is more popular. For stainless steel impellers, Stainless steel alloys are widely used as the material for mixing impellers. It has excellent resistance to corrosion. It can minimize contamination of the materials being processed. The concern for purity in the food, dairy, beverage, and pharmaceutical industries is reflected in the demand for smooth surfaces. Particularly the surfaces that contact the fluids being used.

How to make an impeller?

How investment casting impeller is made? From the types of impellers, we can see that there are many different shapes, function and the structure of each type is also different. To meet the multi demands of mixing impellers, we use the lost wax casting method. So it is also called an investment casting impeller.

We manufacture impeller castings by the investment casting process for a number of different industries, including Oil and gas industry, Chemical and food-based lines of work, Pharmaceutical and petrochemical industries.

Below is a video for investment casting impeller making.

Investment Casting Impeller Manufacturer

Besides investment casting impellers, we can also make other investment casting parts for pumps & valves, including Covers, Cap Regulators & End Caps, Valve body, Pump body, Valve Discs, Coil Housings, Valve Bonnets.

As the professional Investment Casting Impeller manufacturer and supplier in China, our Foundry often investment casting impellers with 316L stainless steel or even higher stainless steel grade. We can make the Investment Casting Impeller process passivated, electropolished, or mirror polished. Our company is able to customize the mixing impeller from our customer’s sample or drawing. We have success exported Investment Casting Impeller to Japan, the USA, AU. If you have any inquiry on Investment Casting Impeller, welcome contact us freely.