Standards of hydraulic hose fittings
Hydraulic hoses are crafted from a diverse range of materials, depending on the application and the specific requirements of the hose. Let’s explore some of the commonly used materials.
Synthetic Rubber
Synthetic rubber is by far the most prevalent material for hydraulic hoses. It’s used for both the inner tube and the outer cover. Among the synthetic rubbers, NBR and EPDM are the most commonly employed. NBR stands out for its excellent oil and corrosion resistance. This makes it an ideal choice for the inner tube, as it often comes into direct contact with oils in hydraulic systems. On the other hand, EPDM excels in wear, aging, and weather resistance. Consequently, it’s frequently utilized as the outer cover to safeguard the hose from external impacts and damage. This way, the combination of NBR and EPDM provides a well-rounded protection for the hose.
Thermoplastic
Certain hydraulic hoses incorporate materials like nylon or PU. These hoses offer several advantages. They are lightweight and highly flexible, which makes them easy to handle and install. Moreover, they possess the ability to withstand exposure to chemicals such as acids and alkalis. This chemical resistance broadens their range of applications, especially in environments where corrosive substances are present.
Steel
Almost every hydraulic hose features a steel wire reinforcement. The number of layers can vary, with some having just one layer, while others may have four or even six. This steel wire reinforcement is an essential component. It provides the necessary strength and durability to the hose, enabling it to handle the pressures and stresses within a hydraulic system. Without it, the hose would be unable to perform its function reliably.
Teflon (PTFE)
Some hydraulic hoses are manufactured using Teflon (PTFE). PTFE is a synthetic material renowned for its outstanding chemical resistance and capacity to endure high temperatures. The PTFE hydraulic hose is also known as SAE 100 R14. Its unique properties make it suitable for applications where extreme chemical or thermal conditions are present, such as in certain industrial processes.
Stainless Steel
Hydraulic hoses can also incorporate stainless steel. This material is highly durable and can cope with extreme temperatures and pressures. It’s often used in specialized applications where robustness and resistance to harsh conditions are of utmost importance.
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