Submersible pump impeller stainless steel lost wax investment casting factory in China

A submersible pump impeller is a rotating component with vanes or blades, typically mounted directly on the motor shaft, that transfers kinetic energy to fluid, accelerating it outward to create pressure and flow. Baoding Guokun can produce OEM submersible pump impeller in various sizes 3-14 inches. Submersible pump impellers are primarily made from corrosion-resistant and durable materials like stainless steel (304/316/duplex), cast iron, bronze, and engineering plastics (e.g., Noryl). Stainless steel is ideal for harsh/clean water, cast iron for heavy-duty industrial applications, bronze for saltwater, and thermoplastic for smaller, budget-friendly pumps. If you need any submersible pump impeller from China pump casting factory, please contact gina@guokuncasting.com to get the quotation.

Investment Casting, Pump Castings Tags: Pump Impeller

Description

The pump impeller is the rotating component in the pump that directly transfers the energy from the motor into the fluid being pumped. Pump impellers are classified as one of three types: Open impeller, semi-open impeller, or closed impeller. Their classification is based on whether they have a protective shroud or not.

Impeller type	Details	Application
Closed impeller	The construction of enclosed impellers includes additional back and front walls on both sides of vanes that enhances its strength. The efficiency of closed impellers is higher. But the more complex design leads to higher production costs than open impellers.	They are generally used in large pumps, centrifugal pumps and clear water applications.
Semi-open impeller	The semi-open impeller is very similar in its design to the closed impeller. The one major difference is the absence of the front shroud. The additional back wall, giving it more strength.	The semi-open impellers or semi-closed impellers are usually used with liquids or mixed solid-liquid products. Mainly, they are well suited for medium sized pumps.
Open impeller	An open face impeller doesn’t have a back or front wall, only have blade and blade reinforcement. Without walls making open impellers slightly weaker than closed or semi-closed impellers. The number of open impeller blades is 2~6.	Open impellers are generally operating at higher tip speed and easier to clean and repair. Open impellers are usually used in smaller pumps and pumps that handle suspended solids and less to clog.

Impellers are made from a variety of materials, including stainless steel, cast iron, bronze, aluminum, austenitic stainless steel, titanium, etc. When you choose the suitable material for pump impeller, you should think about the following several factors, strength, fluid compatibility, abrasion resistance, environmental conditions, type of liquid being pumped, casting and machining properties, etc.

Baoding Guokun, an ISO 9001:2008 certificated investment casting and machining factory, can offer you the most suitable material as per your pump’s requirements. And with 25 years casting experience, we can produce the custom pump impellers with the suitable cast metal and casting process.

Product name	Material	Casting process
Pump impeller	300 series Stainless steel, 400 series stainless steel, low-carbon steel, alloy steel, mild steel, cast steel	Investment casting ( lost wax casting)
	Cast iron, ductile iron, grey iron	Sand casting, lost foam casting
	Bronze, Nickel-aluminum bronze, brass, aluminum, etc.	Sand casting or gravity casting for aluminum pump impeller

Submersible pump impeller stainless steel AISI 304, AISI 316 material information.

Stainless steel is a type of low-carbon steel that is resistant to corrosion and rusting. It is made from iron, chromium, and other elements, such as nickel, carbon, molybdenum, and nitrogen. The chromium content in stainless steel is at least 10.5%, which creates a chromium oxide layer on the surface that protects the material from further oxidation.

Stainless steel has many properties, including corrosion resistance, durability, temperature resistance, recyclability, maintenance, modern appearance, high tensile strength, good ductility and high hardness. The stainless steel can be used in many different industries, such as automotive, aircraft, construction, marine, medical, food, etc.

stainless steel alloys
	Chemical Composition				Mechanical Properties
	C	Cr	Ni	Mo	Tensile StrengthMPa	Yield strengthMpa	Elongation%
304	≤0.08	18 ~ 20	8 ~ 11	–	≥520	≥205	≥45
304L	≤0.03	18 ~ 20	8 ~ 12	–	≥480	≥175	≥45
316	≤0.08	16 ~ 18	10 ~ 14	2 ~ 3	≥520	≥205	≥45
316L	≤0.03	16 ~ 18	10 ~ 14	2 ~ 3	≥480	≥175	≥45
410	≤0.12	11.5 ~ 13.5	≤0.75	–	≥440	≥205	≥20
430	≤0.12	16 ~ 18	≤0.75	–	≥450	≥205	≥22

What’s the best material for a pump impeller?

Stainless steel is the most common pump impellers material because of its anti-corrosive, anti-heat and anti-contamination properties. The Baoding Guokun stainless steel casting pump impellers are made as investment casting process, or lost-wax casting process that results in a significantly improved surface finish & casting tolerance and impeller quality than other sand cast bronze pump impellers.

Baoding Guokun Investment casting stainless steel pump impeller’s steps:

No.	Steps	Details
1	Patterns Makings	Creating a wax mold of the desired stainless steel pump impellers, and then adding sprues to the wax model to create a tree-like structure.
2	Shell Building	Coating the wax pattern with a layer of fire-resistant paint, and then to be sprinkled with sand, so after a period of hardening, the surface will form a layer of fire-resistant thin shell.
3	Dewaxing	Removing the wax, the shell is placed into an oven, melting the wax so that it can run out of the shell.
4	Pouring	Pouring the molten stainless steel into the shell, and waiting for solidification under room temperature.
5	Post treatment	After cooling, knock the shell and cut the sprue gate by grinding machinery to achieve net shape impeller castings. Then shot blasting to move mill scales to assure the smooth casting surface.
6	Machining	CNC Machining & Balancing

Baoding Guokun can manufacture a multitude of pump casting parts, for example, pump housing, pump casing, cast pump body, pump mounting bracket, casting pump impeller, volute casing, pump impeller, pump casing cover, back liner, pump bracket cover, pump vane and all other customized cast pump components for the centrifugal pumps, vertical centrifugal pump, horizontal centrifugal pump, fire hydrant pump, gear pump, lobe pump, piston pump vacuum pump, submersible pumps, electric pumps and water pump.

A High Quality China Foundry！

Guokun Casting, of Baoding Hebei is an ISO 9001-2008 registered iron and steel foundry & supplier of high quality carbon steel, cast iron and machined castings used in power, mining, railway, agricultural, tillage, truck, automobile, pump, valve, motor, pipe fittings and gear industry.

With a montly capacity of 10,000kgs and with more than 15 years of experience ensure the short delivery and the highest valued iron & steel casting parts.

Baoding Guokun Machining Equipment

Pump casting, Valve casting, agricultural casting, aircraft casting, railway casting, road casting, motor casting, mining casting, power generation investment casting, Medical casting, marine industry casting

Baoding Guokun Machinery Co., Ltd.

Baoding Guokun Export and Import Trading Co., Ltd

Office Add: 777# Chaoyang South Street, Baoding City, Hebei, 071000, China

Factory Address: Wangdu County, Baoding City, Hebei, 071000, China

Website: www.metalcastingfactory.com

Tel: 86-312-5951319 Fax: 86-312-5951296

Phone: 86-181 3278 9710 (WhatsApp & WeChat)

Email: gina@guokuncasting.com

gina.guokun@gmail.com