Rauh hose fittings Germany Rauh model Rauh price

Rauh hose 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 pipe fittings serve as connecting accessories in this process. Hydraulic pipe fittings are detachable connectors between oil pipes and oil pipes, or between oil pipes and hydraulic components. They should meet requirements such as easy assembly and disassembly, reliable connection, reliable sealing, small external dimensions, high oil flow capacity, low pressure loss, and good manufacturability. Hydraulic pipe fittings are widely used in various aspects of our lives. They are mainly used in hydraulic piping systems across industries such as energy, petrochemicals, electric power, ships, automobiles, rail transit, mining, metallurgy, steel plants, offshore engineering, and construction machinery. Construction machinery is where hydraulic pipe fittings are most extensively used.

Rauh hose fitting classification

Welded pipe fittings: The adapter is welded to the pipe. An O-ring seal provides face sealing between the fitting body and the adapter. Simple structure, easy to manufacture, good sealing, and low requirements for pipe dimensional accuracy. High welding quality is required, and assembly/disassembly is inconvenient. Operating pressure can reach 31.5MPa, operating temperature -25 to 80°C, suitable for piping systems using oil as the medium. Bite-type pipe fittings: The ferrule deforms to grip the pipe and provide sealing. Advanced structure, good performance, light weight, small size, easy to use, widely used in hydraulic systems. Operating pressure can reach 31.5MPa. High pipe dimensional accuracy is required, requiring cold-drawn steel pipes. High ferrule precision is also required. Suitable for piping systems with oil, gas, and general corrosive media. Flared pipe fittings: Sealing is achieved by flaring the pipe end, without requiring other sealing elements. Simple structure, suitable for thin-walled pipe connections, applicable to low-pressure piping systems with oil or gas as the medium. Insert-welded pipe fittings: Insert the pipe of the required length into the fitting until the pipe end contacts the inner end of the fitting, and weld the pipe and fitting into one unit. This eliminates the need for an adapter, but strict pipe dimensional accuracy is required. Suitable for piping systems with oil or gas as the medium. Taper-seal welded pipe fittings: One end of the adapter has an outer tapered surface with an O-ring seal that mates with the inner tapered surface of the fitting body, tightened with threads. Operating pressure can reach 16 to 31.5MPa, operating temperature -25 to 80°C, suitable for piping systems with oil as the medium. Crimped hose fittings: Easy to install, but adds a crimping step. If the hose is damaged, the fitting outer sleeve cannot be reused. They are assembled with wire-braided hoses to form complete assemblies. Can be used with welded pipe fittings sealed with O-rings. Suitable for piping systems with oil, water, or gas as the medium. Medium temperature: Oil: -30 to 80°C; Air: -30 to 50°C; Water: below 80°C. Three-piece hose fittings: No need to strip the outer rubber layer of the hose during assembly. For hoses with slightly different outer diameters, compensation is achieved by the pre-compression of the hose by the fitting outer sleeve. The hose pre-compression amount within the range of 31% to 50% ensures no leakage under operating pressure, prevents hose pull-out, and avoids outer rubber layer rupture. Can be connected with welded pipe fittings, quick-change fittings, and bite-type pipe fittings. Suitable for piping systems with oil, water, or gas as the medium. Their operating pressure and medium temperature are limited by the connected hose. Quick-change fittings (two-end shut-off type): After the pipe is disconnected, it self-seals, preventing fluid loss in the pipeline, making it suitable for frequent disassembly occasions. Complex structure, higher local resistance loss. Suitable for piping systems with oil or gas as the medium, operating pressure below 31.5MPa, medium temperature -20 to 80°C. Quick-change fittings (two-end open type): Suitable for piping systems with oil or gas as the medium. Their operating pressure and medium temperature are limited by the connected hose.

Rauh hose fitting selection

How to select high-pressure pipe fittings: 1, Hose size: The hose inner diameter must be appropriate. If the hose is fixed with clamps or passes through spacers such as steel plates, pay attention to the hose outer diameter. 2, Operating pressure: According to the safety factor for hydraulic hoses specified by relevant international standards, the recommended operating pressure is typically one-quarter of the hose's minimum burst pressure. 3, Impact pressure and fatigue life: Hose selection is determined based on the maximum pressure value of the hydraulic system design. Impact pressure does not significantly affect hose fatigue life. For hydraulic systems with very frequent impact pressure, it is recommended to select hose products specially resistant to pulsating impact. 4, Temperature range: Users should use hoses within the temperature range allowed by the hose quality specifications. For continuous operation, regular cooling is recommended. 5, Chemical compatibility: If special hydraulic media are used, users must ensure that the hose assembly's inner and outer layers, fittings, and O-ring seals are compatible with the medium.

Rauh hose fitting classification

Can copper pipes use bite-type pipe fittings? Yes, copper pipe connections can use bite-type pipe fittings. Common fittings for copper pipe connections include: bite-type copper pipe fittings; copper quick-connect fittings; flared copper pipe fittings; u-type copper pipe fittings. Bite-type pipe fittings are sealed pipe fittings suitable for non-corrosive or corrosive media such as oil, water, and gas. They offer flexible specification requirements when used with aluminum-plastic pipes. After connection to the pipeline, they feature reliable connection and good sealing performance, and are therefore widely adopted in systems such as oil refining, chemical industry, light industry, textiles, national defense, metallurgy, aviation, and ships. They are also suitable for hydraulic transmission pipelines in various mechanical engineering and machine tool equipment. Bite-type pipe fittings are a type of hard-seal fitting, forming a seal by the nut and body compressing the ferrule into the outer wall of the steel pipe. They are generally used on high-pressure pipelines, including steel pipes, copper pipes, and iron pipes.

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