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

Core Product Features

Premium Material & Reliable Performance: According to different application scenarios and requirements, materials such as cast iron (e.g., HT150), aluminum alloy (e.g., A380), stainless steel (e.g., 304, 316), or engineering plastics (e.g., PA66+GF30) are available. Cast iron housings offer excellent wear resistance and strength, ideal for high-wear applications; aluminum alloy housings are lightweight with good heat dissipation and corrosion resistance; stainless steel housings feature superior corrosion and high-temperature resistance, suitable for special media or harsh environments; engineering plastic housings provide good insulation, chemical resistance, and lightweight advantages.
Precision Manufacturing & Accurate Dimensions: Adopt precision casting, injection molding, or CNC machining processes with strict dimensional tolerance control. For casting processes, key hole diameter tolerance ≤±0.05mm and flatness ≤0.03mm/m; for injection molding, dimensional tolerance ≤±0.1mm/m. The low inner surface roughness reduces oil flow resistance and ensures stable oil flow.
Optimized Structure & Stable Oil Delivery: The internal flow channel is reasonably designed to guide oil smoothly from inlet to outlet, reducing flow resistance and eddy currents to improve delivery efficiency. The structure also optimizes compatibility with internal pump components (e.g., impellers, gears), ensuring stable pump operation and meeting equipment requirements for oil flow and pressure.
Superior Sealing & Leakage Prevention: Reliable sealing structures (e.g., sealing rings, gaskets) are used at connections with pump covers and pipelines, withstanding pressure ≥1.0MPa without leakage. Effectively prevents oil leakage and guarantees normal pump operation.
Full-scenario Adaptation & Strong Customization: Suitable for small hydraulic systems, automotive power steering systems, fuel injection systems, etc. According to customer-provided drawings or technical requirements, we can accurately develop external dimensions, mounting interfaces, flow channel structures, etc., to meet the needs of different equipment and systems.

Core Process Advantages

Independent Mold Development: In-house professional mold workshop uses CAD/CAE technology for mold design and simulation analysis. Optimizes mold structure based on product characteristics and performance requirements, improving mold precision and service life while shortening sampling cycle by 20%.
Full-process Quality Control: Strict quality control from raw material procurement to product delivery. Raw materials undergo spectral analysis and mechanical property testing to ensure compliance; production parameters (temperature, pressure, time) are real-time monitored; finished products pass dimensional accuracy testing, sealing testing, pressure testing, etc. Complete test reports are provided for each batch with traceable quality.
Advanced Equipment & Efficient Production: Equipped with advanced domestic and foreign casting, injection molding, and processing equipment (e.g., precision casting machines, injection molding machines, CNC machine tools). Ensures high production efficiency to meet large-volume orders while maintaining stable product quality.

Application Scenarios

Small Hydraulic Systems: Provides housing support for small hydraulic pumps, widely used in hydraulic systems of small construction machinery, agricultural machinery, machine tools, etc.
Automotive Auxiliary Systems: Suitable for automotive power steering systems, fuel injection systems, engine lubrication systems, providing reliable oil delivery guarantee for normal vehicle operation.
Industrial Equipment: Applicable to lubrication and cooling systems of various small industrial equipment, such as compressors, vacuum pumps, reducers, etc.
Other Fields: Widely used in space-constrained applications requiring miniaturized oil pumps, such as marine equipment and aerospace auxiliary equipment.

Typical Application Cases

Small Hydraulic Systems - Construction Machinery: Provided aluminum alloy small oil pump housings for the hydraulic system of a small excavator. Lightweight with good heat dissipation, effectively improving hydraulic system response speed and stability. Batch-supplied to 5,000 units with stable operation.
Automotive Auxiliary Systems - Power Steering: Supplied PA66+GF30 engineering plastic small oil pump housings for the power steering system of a renowned automotive brand. Features good chemical resistance and lightweight design, reducing vehicle energy consumption with an annual supply of over 100,000 units.
Industrial Equipment - Compressor Lubrication: Customized stainless steel small oil pump housings for the lubrication system of a compressor. Excellent corrosion and high-temperature resistance, with a service life of ≥5 years under harsh working conditions. Applied to more than 2,000 compressors.

Quality Assurance

Test Reports: Provide raw material quality reports, mechanical property test reports, dimensional accuracy reports, sealing test reports, pressure test reports, etc.
After-sales Commitment: Free replacement of unqualified products within 12 months for non-human damage; provides lifelong technical consultation and after-sales service to promptly solve customer problems during use.
Quality Standards: Strictly complies with relevant national and industry standards, such as GB/T 9439 Gray Iron Castings Standard and GB/T 15114 Aluminum Alloy Die Castings Standard.

Main Technical Specifications (Standard Models)

Parameter Type	Specification Range
Material Grade	HT150 Cast Iron, A380 Aluminum Alloy, 304/316 Stainless Steel, PA66+GF30 Engineering Plastic, etc.
Adaptable Scenarios	Small Hydraulic Systems, Automotive Auxiliary Systems, Industrial Equipment Lubrication Systems, etc.
Key Accuracy	Key Hole Diameter Tolerance ≤±0.05mm (Casting); Dimensional Tolerance ≤±0.1mm/m (Injection Molding); Flatness ≤0.03mm/m
Sealing Pressure	≥1.0MPa
Oil Flow	Customized according to different models and equipment requirements
Working Temperature	-20℃ - 150℃ (Varies by material)
Service Life	≥3 Years (Under normal working conditions)