Rose+Krieger hose connector Germany Rose+Krieger model Rose+Krieger price

Rose+Krieger hose connectors are pipe fittings and pipeline connectors. Also known as tee fittings or three-way fittings, they are used where branch pipes diverge from the main pipeline. A tee has three openings: one inlet and two outlets, or two inlets and one outlet. It is a type of chemical pipe fitting available in T shape and Y shape, with equal-diameter or reducing ports, used for the junction of three identical or different pipelines. The main function of a tee is to change the direction of fluid flow.

Rose+Krieger hose connector assembly

The most critical step in the pre-assembly of bite-type pipe fittings directly affects sealing reliability. Specialized pre-assembly tools are generally required. Small-diameter fittings can be pre-assembled in a vise. The specific method involves using one fitting body as the base, pressing the nut and biting ring onto the tube. Main types include bite-type straight-through pipe fittings, bite-type end-straight-through fittings, and bite-type tee pipe fittings. It has been observed that even within the same batch from the same manufacturer, the depth of the tapered hole in these fitting bodies often varies, resulting in leaks, a problem that is often overlooked. The correct approach is to pre-assemble the corresponding connection end with the same type of fitting as used on the other end of the tube, which minimizes the risk of leakage. The tube end face should be flat. After cutting, the tube should be ground flat on a grinding wheel or similar tool, deburred, cleaned, and blown dry with high-pressure air before use. During pre-assembly, maintain coaxiality between the tube and the fitting body; excessive deviation will cause seal failure. Pre-assembly force should not be excessive; the inner edge of the biting ring should just embed into the outer wall of the tube, and the biting ring should not show obvious deformation. During pipeline connection, assemble according to the specified tightening torque. The tightening torque for ф6-1 biting ring is 64-1 15n, for 16фmmr it is 259n, and for ф18mm it is 450n. If the biting ring deforms severely during pre-assembly, it will lose its sealing function. Do not add sealants or other fillers. Some apply sealant to the biting ring for better sealing, but the sealant can be flushed into the hydraulic system, causing faults such as clogging of damping holes in hydraulic components. When connecting pipelines, ensure sufficient deformation allowance for the tube to avoid tensile stress. Avoid lateral forces during connection, as excessive lateral force causes poor sealing. Complete the connection in one go; avoid multiple disconnections, as this deteriorates sealing performance.

Rose+Krieger hose connector classification

Welded pipe fittings utilize welding between the adapter and the tube. 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 tube dimensional accuracy. High welding quality is required, and assembly/disassembly is inconvenient. Working pressure up to 31.5MPa, working temperature -25 to 80°C, suitable for oil-medium pipeline systems. Bite-type pipe fittings use the deformation of the biting ring to grip the tube and seal. Advanced structure, good performance, lightweight, compact, easy to use, widely used in hydraulic systems. Working pressure up to 31.5MPa, requires high tube dimensional accuracy and cold-drawn steel tubes. High biting ring precision. Suitable for oil, gas, and general corrosive media pipeline systems. Flared pipe fittings use flaring at the tube end for sealing, requiring no other sealing elements. Simple structure, suitable for thin-walled tube connections, applicable to low-pressure pipeline systems with oil or gas media. Insert-welded pipe fittings involve inserting the tube into the fitting until the tube end contacts the inner end of the fitting, then welding them together. This eliminates the need for an adapter but requires strict tube dimensions. Suitable for oil and gas media pipeline systems. Tapered seal welded pipe fittings have an adapter with an external tapered surface plus an O-ring seal mating with the internal tapered surface of the fitting body, tightened with threads. Working pressure up to 16 to 31.5MPa, working temperature -25 to 80°C, suitable for oil-medium pipeline systems. Crimped hose fittings are easy to install but add a crimping process. The outer sleeve cannot be reused if the hose is damaged; they form assemblies with wire-braided hoses. Can be used with welded pipe fittings sealed with O-rings. Suitable for oil, water, and gas media pipeline systems. Medium temperature: Oil: -30 to 80°C; Air: -30 to 50°C; Water: below 80°C. Three-piece hose fittings do not require stripping the outer rubber layer of the hose during assembly. Compensation for slight variations in hose outer diameter is achieved by the pre-compression of the hose by the outer sleeve. A pre-compression range of 31% to 50% ensures no leakage under working pressure, preventing hose pull-out and outer layer rupture. Can be connected to welded pipe fittings, quick-change couplings, and bite-type pipe fittings. Suitable for oil, water, and gas media pipeline systems; working pressure and medium temperature are limited by the connected hose. Quick-change couplings (two-end shut-off): Self-sealing after tube disconnection, preventing fluid loss, suitable for frequent disassembly. Complex structure, higher local resistance loss. Suitable for oil and gas media pipeline systems, working pressure below 31.5MPa, medium temperature -20 to 80°C. Quick-change couplings (two-end open): Suitable for oil and gas media pipeline systems; working pressure and medium temperature are limited by the connected hose.

Rose+Krieger hose connector forming method

The hot push elbow forming process uses a specialized elbow pushing machine, core mold, and heating device. The blank placed on the mold moves forward under the push of the machine, undergoing heating, expansion, and bending. The deformation characteristic of hot push elbows determines the tube blank diameter based on the principle of constant volume before and after plastic deformation of metal materials. The tube blank diameter used is smaller than the elbow diameter. The core mold controls the deformation process, allowing compressed metal at the inner arc to flow and compensate for other areas thinned by expansion, resulting in an elbow with uniform wall thickness. The hot push elbow forming process features an attractive appearance, uniform wall thickness, and continuous operation, making it suitable for mass production. Thus, it has become the main forming method for carbon steel and alloy steel elbows, and is also applied in the forming of stainless steel elbows of certain specifications. Heating methods during the forming process include medium-frequency or high-frequency induction heating (heating coils can be multi-turn or single-turn), flame heating, and reverberatory furnace heating. The choice of heating method depends on product requirements and energy availability.

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