High-Pressure Hydraulic Fittings | Oil Pipes & Joints - China Suppliers & Factory
Product Description
Structurally, it is mainly divided into various forms such as straight through, elbow, tee, variable diameter, hinge, flange, etc. The thread specifications cover metric M, imperial G, American NPT, JIC and other standards. It is matched with O-ring, combination gasket or metal hard seal to achieve high-pressure sealing without oil leakage, firm installation and strong sealing performance.
The advantage lies in excellent pressure resistance, adaptability to high-pressure oil system, reliable connection, earthquake resistance and anti loosening; Complete specifications, strong universality, can quickly connect hydraulic oil pipes of different diameters and threads; Easy disassembly and assembly, convenient for equipment maintenance and pipeline layout.
Mainly used in hydraulic equipment such as excavators, loaders, forklifts, injection molding machines, and presses, responsible for conveying hydraulic oil, ensuring smooth oil flow and stable pressure, it is an indispensable basic component in hydraulic systems.
Hydraulic oil pipe joints are key components in hydraulic systems that connect pipelines, hoses, hydraulic pumps, valves, and other components. Their main function is to ensure sealing, withstand high pressure, and achieve reliable connections.
Common Types
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Expansion joint: Sealing is achieved by expanding the end of the pipe into a trumpet shape, suitable for medium and low pressure (copper or thin-walled steel pipes).
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Card sleeve joint: using a card sleeve to cut into the pipe wall to form a seal, it is resistant to high pressure and earthquake, and is widely used in construction machinery (steel pipes).
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Welded joint: The pipe is welded to the joint body, with high strength and reliable sealing, suitable for high temperature, high pressure or high vibration environments.
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Hose connector: used to connect hydraulic hoses, commonly of the crimping or reusable type, integrated with the hose.
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Quick connector: Can be manually and quickly disassembled, used in situations where frequent connection/disconnection is required (such as portable hydraulic tools).
Key Parameters and Selection
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Thread standard: It is necessary to match the interface thread, commonly including metric (M), imperial (G, cylindrical pipe thread), American (UNFPA/UN), and tapered pipe thread (PT/NPT). Choosing the wrong option may result in oil leakage or damage to the interface.
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Pressure level: Select according to the system working pressure (low pressure, medium pressure ≤ 16MPa, high pressure ≤ 35MPa, ultra-high pressure higher).
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Diameter (inner diameter): It needs to match the inner diameter of the pipeline to ensure flow and avoid pressure loss.
Frequently Asked Questions (FAQ)
Q: What are the main structures of hydraulic oil pipe joints?
A: Structurally, they are mainly divided into various forms such as straight through, elbow, tee, variable diameter, hinge, and flange. They support thread standards like metric M, imperial G, American NPT, and JIC.
Q: What are the key advantages of using high-pressure hydraulic joints?
A: They offer excellent pressure resistance, reliable connections, earthquake resistance, and anti-loosening properties. They are easy to install, disassemble, and maintain.
Q: Which hydraulic joint is best for high vibration environments?
A: Welded joints are highly suitable for high temperature, high pressure, or high vibration environments because the pipe is welded directly to the joint body, providing high strength and a reliable seal.
Q: How do I select the right parameters for a hydraulic connector?
A: You must match the correct thread standard (metric, imperial, American, etc.), select the appropriate pressure level based on working pressure, and match the inner diameter of the pipeline to avoid flow restrictions.
Q: In what applications are hydraulic oil pipe joints primarily used?
A: They are widely used in hydraulic equipment like excavators, loaders, forklifts, injection molding machines, and presses to convey hydraulic oil and maintain stable pressure.