Our goal is to be your true partner in the general machinery field in China. China Weilong is committed to developing and supplying customized metal parts for different industries. We have experienced staff and engineers to help you improve and modernize your production process to save costs, and we can also help you control quality, inspect products and monitor delivery time during production. We provide reasonable pricing, compliance with product specifications/standards, effective packaging, on-time delivery to all parts of the world, and impeccable service.
Why choose us
Product Application
Weilong's main capabilities include forging, sand casting, investment casting, centrifugal casting and machining. We serve the fields of industrial manufacturing, oil drilling, aerospace and high-end medical fields.
Our Certificates
We have passed ISO 9001:2015, API-7-1 quality system certification, dedicated to the development and supply of customized metal parts for different industries.
Product Market
Our products are sold to more than 100 regions including the UK, Germany, France, Italy, Poland, the United States, Canada, the Netherlands, Sweden, Austria, New Zealand, Singapore, India, etc.
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ImpellerWhen it comes to pumping fluids, an impeller meaning is an essential component of centrifugal pumps.
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Mandrel BarsItem:Mandrel Bars. Material: H13 (4Cr5MoSiV1). Diameter Range: 90mm to 500mm. Length: Up to 18.5 meters . Connecting Thread: Partial Trapezoidal Thread. Process:Forging+Heattreatment+Machining.
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ImpellerItem:ImpellerMaterial:1.4404 Weight:3.5kgProcess:Silical sol+machining
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Aluminum Filter HeadItem:Filterhead . Material:A380. Weight: 0.3KG. Process: Die casting
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Forged Piston RodItem:Forged piston rod. Material:AISI 4340. Weight:2200kg. Process:Open forging. Application:Steam hammer
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False Valve TopItem:Valve false top. Material: SG420/12 . Weight:1kg. Process:Sand casting+machining
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Industrial Gearbox PartsItem:Gear Box Parts. Material: GG20. Weight:5kg. Process:Sand Casting+Machining+Hobbing.
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Standpipe KitItem:Standpipe kit. Material:Aluminium . Weight:3kg. Process:Sand casting+machining+assembling
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Boiler Burner HousingItem:Boiler burner housing. Material: ZL101. Weight:8.7kg. Process:Sand Casting + Machining + Painting
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Sand Casting CarrierItem:Carrier. Material: GX50 NiCrCoW 35-25-15-5. Weight:200kg~600kg. Process: Sand casting
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Sand Casting HandwheelItem:Handwheel. Material: QT450. Weight:1kg~50kg. Process:Sand casting+machining+chromeplated
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Machined Parts Coupling HubItem:Coupling hub. Material: 1045 steel. Weight:7kg. Process:Machining+Plated dacromet
Types of General Machinery
The general machinery produced by our company mainly include the following types:
Impeller
When it comes to pumping fluids, an impeller meaning is an essential component of centrifugal pumps.
Mandrel Bars
Mandrel bars are cylindrical tools typically made of metal, used in various manufacturing processes, especially in metalworking and machining operations.


Aluminum Filter Head
The Aluminum Filter Head is a specialized component used in filtration systems to provide reliable and efficient filtration capabilities. It offers a range of features that make it an ideal choice for various applications, ensuring effective filtration performance, durability, and ease of maintenance.
Forged Piston Rod
A forged piston rod, also known as a crankshaft connecting rod or forging connecting rod, is a crucial component in internal combustion engines.
Advantages of General Machinery
Impeller have many advantages, including:
Balancing and precision: Impellers are carefully balanced during production to minimize vibrations and ensure smooth operation.
Versatility: Impellers have versatile applications across industries such as water treatment, hvac systems, chemical processing, oil refining, power generation, and more.
Mandrel bars have many advantages, including: They are inserted inside the hollow workpiece, such as a tube or a pipe, to prevent it from collapsing or deforming during the shaping process. This internal support helps maintain the desired geometry and prevents defects such as wrinkling, buckling, or ovality.
Aluminum filter head have many advantages, including:
Easy maintenance: These filter heads are designed with user convenience in mind.
Versatile design: These filter heads are designed to accommodate a variety of filter elements, including mesh screens, cartridges, or other media.
Efficient filtration: The aluminum filter head is engineered with precision to ensure optimal filtration efficiency.
Forged piston rod have many advantages, including:
Superior strength: Forged piston rods are known for their exceptional strength and durability. The forging process aligns the grain structure of the metal, enhancing its mechanical properties such as tensile and yield strength.
Precision machining: After forging, forged piston rods undergo precision machining to achieve accurate dimensions and smooth surfaces.
High fatigue resistance: The forging process used in manufacturing forged piston rods significantly improves their fatigue resistance.
Application of General Machinery
Impeller can be used for a variety of purposes, including:
Pumping systems: Impellers are a key component in centrifugal pumps commonly used in water supply systems, wastewater treatment plants, irrigation, cooling towers, and building hvac systems.
Oil and gas industry: Impellers are employed in pumps used for crude oil refining, pipeline transportation, gas compression, or offshore drilling operations.
Power generation: Impellers are integral to turbines used in hydroelectric power plants or thermal power stations.
Mandrel bars can be used for a variety of purposes, including:
Construction: Mandrel bars play a role in the production of metal tubes and pipes used in construction applications such as building frameworks, handrails, and plumbing systems.
Steel manufacturing: In the production of seamless steel tubes and pipes, mandrel bars are crucial for maintaining the integrity and uniformity of the products during the rolling or extrusion process.
Automotive: Mandrel bars are employed in the fabrication of exhaust pipes, mufflers, and other tubular components in the automotive industry, ensuring the desired shape and dimensional accuracy.
Oil and gas: In the oil and gas industry, mandrel bars are utilized for forming seamless pipes used in drilling operations, pipelines, and refineries, ensuring the reliability and integrity of the infrastructure.
Aluminum filter head can be used for a variety of purposes, including:
Water treatment: These filter heads play a vital role in water treatment plants, purifying water by removing sediments, suspended particles.
Automotive industry: These filter heads are commonly employed in automotive manufacturing plants for filtering fluids such as oil, coolant, hydraulic fluids.
Industrial manufacturing: Aluminum filter heads are used in manufacturing facilities for filtering process liquids, such as cutting fluids, lubricants.
Forged piston rod can be used for a variety of purposes, including:
Motorcycle engines: Motorcycle engines also employ forged piston rods for the same purpose—transferring power from the piston to the crankshaft.
Automotive engines: Forged piston rods are extensively used in automotive engines, both in gasoline and diesel applications.
Industrial engines: Industrial engines, such as those used in power generation, construction equipment, or agricultural machinery, rely on forged piston rods for their strength and durability.

Do not hot torque bolts on rods. If you do so, as the rod cools; the bolt will lose some of its preload. If you over torque the bolt you may permanently damage it.
Under no circumstances should you re-serrate the mating surfaces. If bearing housing distortion should occur, return the rods for resizing.
If the general machinery is to be stored for any period of time (over winter, etc.) it is recommended to remove the rods, clean thoroughly in solvent, oil all parts and store with the bolts at least one turn loose. If you have any questions about maintenance of our rods, please call us.
Our Factory
China Welong was found in 2001, dedicated to the development and supply of customized metal parts which used in different kinds of industries.

Certifications
We have passed ISO 9001:2015, API-7-1 quality system certification.

FAQ
As one of the leading general machinery manufacturers and suppliers in China, we warmly welcome you to buy customized general machinery from our factory. All bespoke products are with high quality and competitive price. Contact us for OEM service.
Machining, Sand casting and machining and assembling, Sand Casting Services and Solutions
