Aeroquip hose fittings Germany Aeroquip models Aeroquip prices

Aeroquip hose fittings Hydraulic tube fittings connect different hydraulic components (pumps, delivery lines, directional valves, shut-off valves, hydraulic motors, hydraulic cylinders, and some auxiliary components such as level gauges, thermometers, pressure gauges, etc.) to form a closed-loop hydraulic system. Hydraulic tube fittings are the connecting accessories in this system. Hydraulic tube fittings are detachable connectors between oil pipes and oil pipes, or between oil pipes and hydraulic components. They should meet the requirements of easy assembly and disassembly, reliable connection, reliable sealing, small external dimensions, high oil flow capacity, low pressure loss, and good processing technology. Hydraulic tube fittings are widely used in various corners of our lives. Hydraulic tube fittings are mainly used in hydraulic piping systems in various industries such as energy, petrochemicals, electric power, ships, automobiles, rail transit, mining, metallurgy, steel plants, marine engineering, and construction machinery. Construction machinery is where hydraulic tube fittings are most frequently used.

Aeroquip hose fitting selection

Chemical equipment pipelines usually transport various corrosive fluids and require frequent flushing with solvents or water. When considering the corrosiveness of the medium, the relationship between the pipeline seals and the medium should be primarily considered. Nitrile rubber is widely used in hydraulic systems because it is compatible with common hydraulic oils. At certain temperatures, nitrile rubber is also compatible with synthetic acetaldehyde, glycol-based chemical liquids, and plant-derived liquids. However, nitrile rubber is not suitable for contact with acidic media, benzene, or synthetic oils at high temperatures; in these cases, fluororubber should be used. Conversely, methane and refrigerant ammonia are only compatible with nitrile rubber. Therefore, most chemical stainless steel pipelines use rigid seals. When selecting tube fittings, the maximum working pressure of each fitting must be at least equal to the maximum set working pressure of the entire hydraulic system. It is necessary to consider not only the pump outlet pressure but also the relief valve activation pressure. The maximum working pressure of hydraulic tube fittings may vary depending on the sealing method or temperature changes: similarly, tube fittings with elastic seals will achieve higher working pressures than those with rigid seals.

Aeroquip hose fitting installation

After cleaning, the pipelines should be formally installed and greased as soon as possible. Connect and tighten all tube fittings section by section according to the printed matching marks. Note that the original o type O-rings must be reinstalled. All piping fixtures must be secure and not loose. All oil supply lines can be connected to the distributor outlets and lubrication points after greasing. Metric general threads are indicated by uppercase M. Metric general threads are divided into coarse-pitch general threads and fine-pitch general threads based on pitch. Coarse-pitch general thread markings generally do not indicate the pitch, for example, M20 indicates coarse-pitch threads. Fine-pitch thread markings must indicate the pitch. General threads are used for the connection and fastening of mechanical parts. Coarse-pitch threads are mostly used for general thread connections. Fine-pitch threads have slightly higher strength and better self-locking performance than coarse-pitch threads of the same nominal diameter. Pipe threads sealed by threads can prevent leakage without adding filler or sealing material. Pipe threads sealed by threads have two connection forms: cylindrical internal threads and conical external threads, and conical internal threads and conical external threads. The former connection is sufficiently tight, while the latter is usually only adopted under high temperature and high pressure conditions.

Aeroquip hose fitting cleaning

To ensure the cleanliness of the lubrication system and supply clean grease to the bearings of mechanical equipment, the pre-installed pipelines must be removed and cleaned. Cleaning methods include kerosene cleaning and acid pickling. Objects and methods for kerosene cleaning include copper pipes and stainless steel pipes; steel pipes that have been acid-pickled before pre-installation and have no rust or iron oxide scale on the inner walls; and tube fittings that were dirtied during pre-assembly. Remove the pipes and fittings that need cleaning. Wipe the inside of the pipes clean with a cloth dipped in kerosene. Soak both ends and the fittings in kerosene for cleaning. Then apply machine oil or fill with grease inside the pipes, seal both ends tightly, and wait for installation. There must be no visually visible contaminants after cleaning. Special attention must be paid to thoroughly cleaning the welding slag on the inner walls of welds. During disassembly, transportation, and acid pickling, take care not to damage the pipelines, threads, and sealing surfaces. Use tape or plastic tubes to block the openings. Threaded parts should be protected with acid-resistant materials such as plastic tape or rubber tape, or dry oil should be applied to the threads after degreasing and water washing before rust removal in acid solution to prevent acid erosion. During acid pickling, ensure that the matching marks on the pipes do not disappear or become blurred.

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