Robust flange connections for high pressures, large bore sizes and reliable installation in hydraulic systems.
SAE flanges are used to connect hydraulic pipes, hoses, pumps, motors, cylinders and other components safely. A flange head, split flange halves, bolts and an O-ring form a strong, detachable connection suitable for high pressures and high flow rates.
Leeuwtechniek supplies SAE flanges and related components for a wide range of hydraulic applications. The range includes threaded flanges, socket-weld flanges, pump flanges, blanking flanges, adapter flanges, split flange halves, flange-to-tube adapters, seals, bolts and elbow and tee blocks.
SAE flange connections are designed for hydraulic systems with high pressures, large bore sizes and heavy mechanical loads.
A flange connection can be disconnected for maintenance, inspection or component replacement.
SAE flanges are particularly useful when threaded connections do not provide sufficient flow capacity or when the mechanical load and system pressure require a more robust connection.
Combine an SAE flange connection with a female or male thread for connection to other components.
Are permanently welded to a hydraulic tube or pipe to create a strong transition to an SAE flange connection.
Designed for connection to hydraulic pumps, motors and other components with an SAE flange port.
Safely seal unused flange ports during operation, maintenance or temporary storage.
Are installed between components to add connections, measuring points or other functions.
Provide a transition from an SAE flange to a hydraulic tube with a 24-degree cutting-ring connection.
Use bolts to clamp the flange head against the flange port and provide mechanical retention.
Change or divide the direction of flow within a hydraulic flange system.
Connect hydraulic hoses directly to an SAE flange port.
SAE flanges are commonly divided into Code 61 and Code 62. These are also frequently referred to as the 3,000 psi and 6,000 psi series. The two versions differ in pressure class, bolt pattern, flange thickness and typical application. Components from the two series are not automatically interchangeable.
| Series | Characteristic | Typical application |
|---|---|---|
| 3,000 psi | Standard-pressure series | General hydraulic systems and medium-pressure applications |
| 6,000 psi | Heavier-duty high-pressure series | Heavy-duty hydraulic systems and higher system pressures |
Always check the product specifications and dimensions. The permissible working pressure depends not only on the series, but also on the size, material, temperature and manufacturer.
An SAE flange connection normally consists of a flange head, two split flange halves, four bolts and an O-ring. The O-ring sits in a groove and seals against the flat face of the flange port.
The bolts and split flange halves press the flange head against the port. This creates a mechanically strong connection, while the O-ring provides the fluid-tight seal.
The O-ring is an essential part of the flange connection. Its dimensions and material must be compatible with the flange size, fluid and operating temperature.
An incorrect or damaged O-ring can cause leakage even when the flange components have been assembled correctly.
Widely used for its high strength and suitability for heavy-duty hydraulic applications.
Suitable for corrosive, wet and chemically demanding environments.
Provided with a protective coating to limit corrosion during use and storage.
SAE flange connections use standardised dimensions. Important factors include the bolt pattern, centre-to-centre distance, flange diameter, O-ring groove and pressure series.
Thoroughly clean the flange faces, O-ring groove and bolt holes. Fit an undamaged O-ring in the groove and make sure it is not twisted or pinched.
Fit the split flange halves and tighten the bolts evenly in a diagonal sequence. This draws the flange squarely against the port and loads the O-ring evenly. Use the specified tightening torque and suitable tools.
An SAE flange connection requires little maintenance, but it should be inspected after maintenance work, pressure peaks, severe vibration or visible leakage.
Code 61 is the standard-pressure series and is commonly referred to as the 3,000 psi series. Code 62, commonly referred to as the 6,000 psi series, has a heavier design for higher pressures. Dimensions and bolt patterns may differ.
No. Only use components designed for the same series and nominal size.
The correct O-ring is determined by the flange size, groove dimensions, fluid and operating temperature.
Possible causes include a damaged O-ring, contaminated flange faces, unevenly tightened bolts or an incorrect combination of components.
Yes. Tightening the bolts in a diagonal sequence helps draw the flange evenly against the port.
Yes, provided that all components are undamaged. Replace the O-ring if there is any doubt or when required by the manufacturer.
Leeuwtechniek supplies SAE flanges, threaded flanges, socket-weld flanges, pump flanges, blanking flanges, adapter flanges, split flange halves, bolts, O-rings and connection blocks for hydraulic systems.
Always consult the technical product data. If you are unsure about the series, size, pressure class, O-ring, bolt pattern or connection type, Leeuwtechniek can help you select the right flange connection.
Robust flange connections for hydraulic systems.
Explore SAE flanges, split flange halves, pump flanges and related components for high-pressure and large-bore applications. Suitable for mobile hydraulics, machinery and industrial systems.