Description

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Qingdao Hailong Machinery Technology Co., Ltd. is one of the leading manufacturers and suppliers of centrifugal pump casing in China, featured by quality products and good service. Welcome to buy durable centrifugal pump casing made in China here and get pricelist from our factory. Also, customized service is available.

Core Product Features

Premium Material & Pressure/Corrosion Resistance：Adopts HT250/HT300 wear-resistant gray iron, QT450/QT500 ductile iron, or 304/316L stainless steel (chemical working conditions), tensile strength ≥250MPa, pressure rating ≤1.6MPa (high-pressure customizable), acid-alkali resistant and medium-corrosion resistant, adapting to complex transportation scenarios.
Resin sand/investment precision casting process, uniform casing wall thickness (error ≤±1mm), flange sealing surface flatness ≤0.02mm/m, combined with special seals, no leakage risk, ensuring transportation efficiency.
Optimized Flow Channel & Energy Saving：Internal flow channel designed based on fluid mechanics principles, reducing fluid resistance, improving pump hydraulic efficiency, saving 5%-8% energy compared to ordinary casings, and lowering operating energy consumption.
Stable Structure & Durable：Integral casting structure, reinforced design of inlet/outlet flanges, enhancing overall rigidity, low vibration and noise during operation; surface treated with shot blasting + anti-rust/anti-corrosion, service life ≥8 years (normal working conditions).
Wide Adaptability & Easy Installation：Strictly compliant with GB/T 5654, API 610 and other industry standards, suitable for single-stage/multi-stage centrifugal pumps, pre-reserved precise mounting holes, quick assembly and positioning, low maintenance cost.

Core Process Advantages

Independent Mold Development: In-house mold workshop, supporting casing size and flow channel structure customization based on pump parameters (flow rate, head)
Full-process Quality Control: Raw material spectral inspection → temperature control during casting → non-destructive testing (UT/MT) → finished product dimension inspection, quality traceable
Cross-process Collaboration: Direct connection to in-house machining workshop after casting, one-time processing of flange surface and seal groove, avoiding secondary clamping errors

Application Scenarios

General scenarios such as industrial water supply and drainage, sewage treatment, farmland irrigation
Chemical medium (acid-base solution, organic solvent), petrochemical transportation scenarios
High-rise building water supply, water conservancy projects, marine power system supporting
Customized special pump (high temperature, high pressure, wear-resistant) casing supporting

Quality Assurance

Material Report: Provide raw material chemical composition, mechanical properties and corrosion resistance test reports
Precision Test: Issue wall thickness, flange flatness, flow channel dimension and non-destructive test reports
After-sales Commitment: Free repair or replacement within 12 months for non-human damage; lifelong technical consultation and adaptation guidance

Main Technical Specifications (Standard Models)

Parameter Type	Specification Range
Material Grade	HT250/HT300 Gray Iron; QT450/QT500 Ductile Iron; 304/316L Stainless Steel
Applicable Pump Type	Single-stage single-suction centrifugal pump, multi-stage centrifugal pump, pipeline pump (caliber DN50-DN500)
Pressure Rating	≤1.6MPa (Standard); 2.5-4.0MPa (High-pressure Customization)
Working Temperature	-20℃-120℃ (Standard); 120℃-300℃ (High-temperature Customization)
Key Accuracy	Wall Thickness Error ≤±1mm; Flange Flatness ≤0.02mm/m; Seal Groove Tolerance ≤±0.03mm
Surface Treatment	Shot blasting derusting + anti-rust paint (Standard); Pickling and passivation (Stainless Steel); Rubber/Plastic Lining (Anti-corrosion Customization)
Service Life	≥8 Years (Normal Working Conditions); ≥5 Years (Chemical Corrosion Conditions)