waldmann hose connectors Germany waldmann models waldmann prices

waldmann hose connectors are widely used in high-pressure piping applications in industrial fields, such as shipbuilding, offshore oil, metal processing, and mining. Flared tube fittings are suitable for hydraulic, lubrication, high-pressure water jetting, and high-pressure air pipelines. Flared tube fittings have been certified by many auditing bodies; they offer high reliability, inherent cleanliness, and strong flexibility, with faster and simpler pre-assembly and installation. The flared connection requires no welding, saving subsequent processes such as pickling and flaw detection. Flared tube fittings are a type of quick connector suitable for various pipe fittings and tubes with nominal pressures not exceeding 32MPa. According to the manufacturer, flared connections are widely used in industries such as oil refining, chemical, light industry, textiles, national defense, metallurgy, aviation, automotive, pharmaceuticals, machinery, shipbuilding, natural gas, and CNG refueling stations.

waldmann hose connector manufacturing process

It includes a sealing ring, a connecting part, and a union nut for connecting the tube. Therefore, the sealing ring is designed as a ring cutter with one or more cutting edges. By screwing the union nut onto the connecting part, the ring cutter can be inserted into the cavity of the connecting part, which has a conical surface. The outside of the sealing ring has an annular reinforcement on the nut side. This annular reinforcement forms an annular surface at its transition zone towards the narrow ring portion. The inclination of said annular surface formed by the reinforced portion of the ring cutter relative to the tube axis is 45°-90°. When fully assembled, the axial length of the annular reinforcement is such that a transfer element arranged on said annular surface can transfer its own negative image structure or itself onto the end face of the connecting part. The transfer element has a three-dimensional profile, the negative image of which can be transferred onto the surface of the connecting part. In a manner similar to die stamping, the assembler applies pressure to imprint the negative image onto the surface of the connecting part.

waldmann hose connector selection

Metal hose connectors consist of a metal hose body, a stainless steel wire mesh braid, and connector fittings. They can compensate for certain relative displacements and provide vibration damping and noise reduction effects. However, improper selection will not only fail to achieve vibration isolation and noise reduction but may also cause pipeline leaks or even equipment failure due to damage to the metal hose. The selection of metal hoses mainly involves the correct choice of parameters such as nominal diameter, connection type, working pressure, temperature correction, minimum bending radius, and hose length. Nominal diameter, connection type, and working pressure are directly determined by the pipeline system requirements and generally pose no issues. It is worth noting that when selecting the design pressure of the hose (which should be greater than the system working pressure), it should not be too high, because as the pressure-bearing capacity of the hose increases, its bending capability decreases significantly. Temperature correction and minimum bending radius are fixed for the product and provided by the manufacturer. Problems often arise in the selection of the metal hose length; a hose that is too long can cause instability, increase flow resistance, and lead to additional mechanical damage and vibration issues. A hose that is too short may fail to achieve compensation, vibration damping, and noise elimination, and may also cause excessive bending stress, affecting service life.

waldmann hose connector functions

Insert the steel tube into the ferrule and tighten it using the ferrule nut. The ferrule bites into the tube to create a seal. No welding is required when connecting to steel tubes, which is beneficial for fire prevention, explosion protection, and high-altitude operations, and eliminates the drawbacks of careless welding. The mechanical advantages and geometry of the fitting make this mechanical device a sealing component capable of preventing leaks. The mechanical thrust pushes the rear ferrule against the conical back of the front ferrule, while simultaneously pushing the front ferrule into the tapered contraction mouth of the fitting body. The ferrule is squeezed radially inward onto the conduit. At this point, pulling out the front ferrule forms a full-face seal on the tapered contraction surface of the fitting body. When hand-tightening feels secure, rotate the ferrule nut further from this hand-tight position to ensure uniform thrust on the seal. This ensures effective sealing performance even in high-pressure and ultra-high vacuum environments. Therefore, it is a relatively advanced connector for self-control device pipelines in systems such as oil refining, chemical, petroleum, natural gas, food, pharmaceutical, and instrumentation.

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