Daman Products hose fittings German Daman Products models Daman Products prices

Daman Products hose fittings are translated from the English word bushing. The professional term is reducing adapter. They are generally machined from cut and forged hexagonal bars. There are many types of threads used. They connect internal and external threaded pipe fittings for two pipes with different diameters and play an irreplaceable role in pipe connections.

Daman Products hose fittings applications

Quick-connect fittings are also called self-locking fittings or quick-insert sealing fittings. They allow locking of pipe fittings and connectors through simple operation, without tightening nuts or using clamps. They can withstand high pressure, 70Bar or even higher. For flanged ports or straight round pipes in cooling water channels, standard fittings require clamping with hose clamps, which involves multiple steps and offers limited pressure resistance. With technological progress, in addition to self-locking quick-connect fittings, pneumatic quick-connect fittings (automation quick-connect fittings) are better suited for industrial automated production, using pneumatic drive. The purpose of using quick-connect fittings is faster operation. Modern mechanized production emphasizes efficiency and aims to reduce operator workload. Their speed is reflected in: easy handling, fewer steps, simple operation, automatic locking, and sealing/disconnection achieved by simply inserting and pulling. This is much more convenient than standard fittings.

Daman Products hose fitting assembly

Pre-assembly of bite-type pipe fittings is a critical step that directly affects sealing reliability. Special pre-assembly tools are generally required. Fittings for small-diameter tubes can be pre-assembled on a bench vise. The specific method involves using one fitting body as the base, pressing the nut and bite 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 bore in these fitting bodies often varies, leading to 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, maximizing leak prevention. The tube end face must 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 tube misalignment will cause seal failure. Pre-assembly force should not be excessive; the inner edge of the bite ring should just embed into the outer wall of the tube, and the bite ring should not show obvious deformation. During pipeline connection, assemble according to the specified tightening torque. The tightening torque for ф6-1 bite rings is 64-1 15n, for 16фmmr it is 259n, and for ф18mm it is 450n. If the bite ring deforms severely during pre-assembly, it will lose its sealing function. Do not add sealants or other fillers. Some users apply sealant to the bite ring for better sealing, but the sealant can be flushed into the hydraulic system, causing faults such as clogged 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 repeated disassembly, as this deteriorates sealing performance.

Daman Products hose fitting selection

Unidirectional flow type: Rotary joints are installed at both ends of the drum. Fluid enters from one end and exits from the other, without using an inner pipe. Unidirectional flow type: A rotary joint is installed at one end of the drum, where fluid is both introduced and discharged. The inner pipe remains stationary relative to the rotation of the drum. Bidirectional flow type (inner pipe fixed): Unlike the previous type, this version uses different types of siphon pipes inside the drum to discharge condensate. This type is mostly used for steam applications. Bidirectional flow type (inner pipe rotating): This type features an inner pipe fixed relative to the drum, rotating synchronously with it. Fluid is introduced through the inner pipe and discharged through the outer pipe. Bidirectional flow type (inner pipe rotating): A siphon device rotating synchronously with the drum is installed inside the drum to discharge condensate. This type is mostly used for steam applications.

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