Duplex stainless steel pump impeller

Part name: water pump impeller, closed impeller

Casting material: Duplex stainless steel 2507 pump impeller

Metal casting process: Silica sol lost-wax investment casting

Casting tolerance: CT4~8

Casting application: pump replacement parts for water pumps, centrifugal pumps, slurry pump, submersible pumps, 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. If need stainless steel pump impeller, please feel free to contact gina@guokuncasting.com to get a quote.

Steel Castings, Pump Castings Tags: Pump Impeller

Description

Duplex stainless steel pump impeller produced by lost wax investment casting and CNC machining process.

What is duplex stainless steel?

Duplex stainless steel is a type of stainless steel that contains both austenitic and ferritic stainless steel. It is known for its strength, corrosion resistance, and resistance to cracking. The duplex stainless steel grades we can cast are 1.4460, 1.4462, 1.4468, 1.4469. 1.4517, 1.4770, 2205, 2507, 022Cr22Ni5Mo3N, 022Cr25Ni6Mo2N, etc.

2507 or UNS32750 is a super duplex stainless steel known for its excellent corrosion resistance and high strength. Alloy 2507 is strong and has a combination of ferritic and austenitic properties.

The information for 2507 or UNS S32750 chemcial composition and mechanical properties

Duplex stainless steel 2507
Chemical composition		Mechanical properties
C%	0.03 Max	Tensile Strength	116 ksi
Si%	0.80Max
Mn%	1.20 Max
Ni%	0.24~0.32	Yield Strength	80 ksi
P%	0.035 Max
S%	0.020 Max
Cr%	24~26	Elongation	15% Min
Mo%	3~5
N%	0.12-0.22
Cu%	0.50 Max

What is pump impeller?

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 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 monthly capacity of 10,000kgs and with more than 25 years of experience ensure the short delivery and the highest valued iron & steel casting parts.

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