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In bioprocessing applications requiring strict sterility and stable flow control, Jiachuang’s wear-resistant sand casting pump covers made from stainless steel and cast steel offer a dependable solution. With high strength, corrosion resistance, and reliable sealing, they support continuous operation, withstand pressure fluctuations, and meet CIP/SIP requirements, making them suitable for fermentation, pharmaceutical intermediates, and other sensitive bioprocess fluid transfers.

In industrial pumps, the impeller is the core component that drives fluid flow, and its quality directly affects the pump's efficiency and service life.

What are the common materials for Casting impeller? Based on the actual application and operating conditions, the common materials for impellers mainly include

As a professional manufacturer of Stainless Steel Pump Casing, we are committed to providing customers with high-precision, high-strength Stainless Steel Pump Casing products, along with comprehensive technical support and solutions. We firmly believe that the quality of our Stainless Steel Pump Casing and other castings is key to winning customer trust, while innovation and efficient service are the driving forces behind our continued development. Choose us, and you will receive high-quality cast Stainless Steel Pump Casing and attentive full-service support. We are confident in recommending our Stainless Steel Pump Casing, impellers, and other products to you, and we are confident you will be satisfied. Our strong factory support can also meet your unique needs, enabling high-level customized production.

Abstract: This paper focuses on the locations, causes, and improvement measures of cracks that are prone to occur in the pump body of multi-stage pumps during sand casting. Starting from the structure of the multi-stage pump body and combining with the key processes of sand casting, a systematic analysis is conducted. The study indicates that the flange connection area of the multi-stage pump body, the root of the blades, and the areas with sudden changes in wall thickness are the high-risk points for cracks. The main reasons are structural stress concentration, improper casting process control, and the characteristics of stainless steel material. The main text deeply explores the influence mechanism of each process on casting defects (such as cracks), and proposes targeted optimization solutions, including improving the structural design, enhancing the strength of the sand mold, and controlling the pouring parameters. The full text emphasizes reducing the occurrence rate of cracks in the casting pump body through refined operation management and improving the reliability and production efficiency of the stainless steel multi-stage pump body.

Recently, Dalian Jiachuang Metal Manufacturing Co., Ltd. (hereinafter referred to as "Jiachuang Metal") has achieved a major technological breakthrough in the field of sand casting. Its independently developed patent technology has successfully solved the manufacturing challenges of OH pump steel casting impellers. According to third-party testing, the comprehensive qualification rate of impellers has increased from the industry average of 85% to 99%, and the production cycle has been shortened by 40%. This achievement not only fills the technical gap in high-end pump castings in Northeast China but also marks the innovative strength of local small and medium-sized enterprises in industrial upgrading.

Abstract: This paper systematically analyzes the causes, common processes and locations of sand hole defects in the sand casting process of BB3 type multistage pump bodies in cast steel parts, and proposes targeted solutions. Through literature review and case analysis, it was found that the defects of sand holes mainly result from insufficient strength of the molding sand, design flaws of the gating system and improper operation, and are prone to occur in the molding, core setting, closing and pouring processes. The specific locations include gates, risers, thick parts of castings and inner cavities. By optimizing the proportion of molding sand, improving the design of the gating system and strengthening process control, the occurrence rate of sand holes can be effectively reduced and the quality of castings can be improved.

At present, the company is mainly to pump valve, blower, compressor, steam turbine, propeller and other fluid mechanical parts casting, Covering oil, petrochemical, shipbuilding, coal chemical industry, water treatment, gas control, automobile manufacturing, cement, spraying, printing, LNG, power and other fields of main engine device components, Including GB, ASME / ASTM, EN, ISO, JIS, Including ordinary carbon steel, austenitic stainless steel, ferrite stainless steel, martenitic stainless steel, precipitation hardened stainless steel, double-phase stainless steel, Lewmet, Inconel, Incoloy, Hastelloy, and Monel and other nickel-based alloys, Cr26, Ni-hard and other anti-wear white mouth cast iron, involving corrosion-resistant, wear-resistant, high-temperature resistance and other high-end materials.

Recently, Dalian Jiachuang Metal Manufacturing Co., Ltd. (hereinafter "Jiachuang Metal") has made a critical breakthrough in sand casting of steel casting impellers—the core of OH pumps—via independently developed patents.