Centrifugal Pump Casing

Centrifugal Pump Casing

Centrifugal Pump Casing

Casting process: Silica sol precision casting / Resin sand casting Standards for appearance, dimensional tolerance and weight tolerance: According to customer requirements Material types: Stainless steel, special steel (according to customer requirements) Single-piece casting weight: Less than 300 kg for silica sol precision casting / Less than 710 kg for resin sand casting.  
Our casting process is suitable for various types of metal casting, including stainless steel, alloy steel, carbon steel, cast iron, aluminum, and nickel alloys.
We provide customized casting services while strictly adhering to the highest quality standards. Your design can be completed within 3-5 weeks, depending on the complexity of the part.
We offer a full set of inspection reports, including material composition analysis, mechanical performance testing, dimensional inspection, and non-destructive testing.
Expert support throughout the process—whether you need casting or machining services, or want to transition your design from forging and machining to casting production, Leierwo will provide the best solution for you.
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Casting process: silica sol precision casting/resin sand casting
Processing method: general turning, CNC, horizontal machining center, boring machine
Processing tolerance: ±0.05mm (general turning) ±0.02mm (CNC) ±0.05mm (horizontal machining) ±0.05mm (boring machine)
Maximum size: 1600mm×1000mm×1000mm
Processing type: CNC four-axis machining center
Certification: ISO9001:2025, DNV, CE
Standards: ASTM, DIN, JIS, EN, ISO, GB standards

Leierwo’s advantages in casting precision castings in the pump casting industry

Pump products typically require high casting precision and material properties, and Leierwo’s expertise in pump casting is particularly prominent. The company’s extensive application in pump and valve accessories demonstrates its mastery of the casting process for key components such as pump bodies, impellers, and sleeves. Precision casting technology effectively controls the uniformity of casting wall thickness and internal cavity accuracy, reducing subsequent processing and improving overall efficiency. Furthermore, the company can recommend the most appropriate casting process based on component structure to further optimize the performance of pump products and meet the corrosion resistance, heat resistance, and fluid dynamics requirements of various industries.

Main material selection

Pump castings are exposed to liquid media for extended periods and often face challenges such as corrosion, wear, and cavitation. Therefore, materials must possess high corrosion and wear resistance, as well as excellent casting properties.

Common Materials:
Stainless Steel Series:
316/316L: Preferred for pump casings, impellers, and shafts, resistant to acids, alkalis, and chloride ion corrosion. 2205 Duplex Steel: High strength and high pitting resistance, suitable for seawater pumps and chemical pumps. 304/304L: General-purpose pump components, suitable for water treatment and the food industry. Carbon Steel Series:
1045: For pump shafts and casings in non-corrosive environments. 4130: For high-temperature, high-pressure pump structural components.

Special Alloy Series:
C95400 Bronze: Suitable for seawater pump sleeves and sliding components, offering excellent wear resistance and self-lubrication.
Cobalt Alloys (such as Co6): Used for sealing surfaces or impellers in high-wear, high-temperature pumps.

Key casting service options

The fluid dynamics performance of pump components (such as impellers and pump bodies) depends on casting accuracy, and this type of service has a clear division of labor!

Investment casting: Dominates complex flow path parts. The impeller is the heart of the pump, and its blade curve (which must conform to the fluid dynamics design) has a complex shape. Dimensional deviations directly reduce pump efficiency. Investment casting can achieve blade profile accuracy of +0.1mm and a surface finish of Ra3.2um or less, reducing fluid resistance.

Sand casting: Used for fundamental components such as the pump body. The pump body, as the outer shell, has a relatively regular shape (mostly cylindrical or square). In mass production, sand casting offers low cost and short cycle times, meeting the basic requirements of “structural support + fluid flow passage.”

CNC machining: Ensures transmission and sealing accuracy. The connection between the pump shaft and impeller, as well as the sealing surface between the pump body and the end cover, require CNC machining to ensure concentricity (≤0.01mm) and flatness to prevent vibration or leakage caused by eccentricity during operation.

What We Offer
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Leierwo is committed to providing the highest quality precision metal parts manufacturing services, including precision casting, investment casting, sand casting, and CNC machining. We offer customized solutions and can complete your design within 3–5 weeks, depending on the complexity of the parts. Before mass production, we provide one free sample for testing and approval.
Investment Casting Service
Features: Investment casting has high precision, can adapt to complex shapes, has smooth surface and little material waste.
Applications: aerospace, precision machinery, automobiles, medical equipment, etc.
Sand Casting Service
Features: It uses sand mold, which is low in cost and suitable for large and complex-shaped metal castings.
Applications: automotive parts, mechanical structural parts, large castings.
CNC Machining Services
Features: high precision, complex parts, and mass production.
Applications: molds, medical device parts, aluminum alloy engine cylinder blocks/cylinder heads.
Our Casting Services – Fufilled Across Metal Grades
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Leierwo possesses extensive expertise across a wide range of alloy grades, enabling our customers to select the ideal materials to optimize their products and meet the most demanding global application requirements. Feel free to explore the alloy series listed below to find the perfect match for your specific needs.

Start Your Project with Leierwo

1. Submit Your Inquiry
Send your CAD drawings and 3D files via email, specifying material grade, order quantity, surface finish, or any other relevant details.
2. Cost Calculation
Once we receive your design, our engineering team will carefully evaluate the drawings and calculate the price based on actual production costs as soon as possible.
3. Start Production
Upon pricing approval, our production team will prepare the materials and schedule production promptly.Leierwo always ensures on-time delivery.
4. Arrange Delivery
After production is completed, we will provide packaging details and arrange shipment via sea or air. We support global shipping for every order.

FAQ

We are a factory with over 20 years of experience in casting and machining. We have rich expertise in this industry. If you come across suppliers claiming to produce castings in a wide range of materials (such as steel, iron, stainless steel, copper, etc.), they are likely trading companies. If you see workshops actively producing parts, you can be assured that we are a genuine manufacturer.

Yes, as long as we receive CAD files or compatible 3D models that can be viewed with software like First Quote or Firstcut browser, we can provide a quotation. Please note that 2D drawings alone are insufficient for manufacturing precision components.

We support 3D CAD models from SolidWorks (.sldprt), ProE (.prt), and other CAD systems, commonly in IGES (.igs), STEP (.stp), ACIS (.sat), or Parasolid (.sat) formats.

We have an internal service system that responds to emails within 4 hours. If your request is urgent, please specify it in your email so we can prioritize your inquiry.

For rapid prototyping:
Silica sol casting: 20–30 days
Sand casting: 7–10 days
For mass production with machining included, the typical lead time is 45–60 days.
More complex parts may require a different delivery schedule.

Yes, we provide samples based on your drawings for you to confirm structure and quality. If the sample does not meet your requirements, we will replace it free of charge until it is qualified.

We accept T/T (bank transfer), Alipay, credit card, etc. Typically, we require a 30% down payment upon order confirmation and the remaining 70% before shipment. For custom parts with complex requirements, additional pricing terms may apply.

We have a comprehensive quality control system that covers every step, from raw material procurement to machining processes and final inspection. For critical components, we strictly follow drawing standards and customer specifications.

All customer data is kept confidential. Only trained engineers are authorized to handle production orders. Third-party inspection or factory audits are welcome, or you may use our in-house quality team for final inspection.

Yes, we guarantee that all materials used are 100% genuine and as specified.

We value long-term cooperation and support our customers’ production needs.

We believe every honest customer is a friend, and we treat our partnerships sincerely—building friendships and strong teams regardless of where our customers come from.

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