VOLKMANN hose connector Germany VOLKMANN model VOLKMANN price

VOLKMANN hose connector is a type of hose connector mainly composed of three components. Metal hose connectors are used in many places. The main component of the metal hose connector, the bendable part, is made of braided metal wire. Metal hose connectors offer good performance and come in a wide variety. Different types of metal hose connectors have different characteristics, structures, and maximum temperature ratings.

VOLKMANN hose connector classification

Classification by pipe diameter: equal-diameter tees have connection ends of the same size; for reduced-diameter tees, the main pipe connection size is the same, while the branch pipe connection size is smaller than the main pipe connection size. Classification by process: 1. Hydraulic bulging: hydraulic bulging of tees is a forming process that expands the branch pipe through axial compensation of the metal material. The process involves using a special hydraulic press to inject liquid into a tube blank with a diameter equal to that of the tee. Two horizontal side cylinders of the hydraulic press move synchronously to center and compress the tube blank. As the tube blank is compressed, its volume decreases, causing the pressure of the liquid inside to rise. When the pressure required to expand the branch pipe is reached, the metal material flows along the mold cavity under the dual action of the side cylinders and the internal liquid pressure, thereby expanding the branch pipe. The hydraulic bulging process for tees allows for one-time forming with high production efficiency; the wall thickness of the main pipe and shoulders of the tee increases. Since the hydraulic bulging process for seamless tees requires equipment with a large tonnage, it is mainly used in China for manufacturing standard-wall tees with diameters less than DN400. Suitable forming materials include low-carbon steel, low-alloy steel, and stainless steel with relatively low tendencies for work hardening, as well as some non-ferrous metals such as copper, aluminum, and titanium. 2. Hot pressing forming: hot pressing forming of tees involves flattening a tube blank with a diameter larger than that of the tee to approximately the tee's diameter, drilling a hole at the branch pipe location, heating the tube blank, placing it in a forming mold, and inserting a punch for stretching the branch pipe inside the blank. Under pressure, the tube blank is radially compressed. During radial compression, the metal flows toward the branch pipe direction and forms the branch under the stretching action of the punch. The entire process forms the tee through radial compression of the tube blank and stretching of the branch pipe area. Unlike hydraulic bulging, the metal for the branch pipe in hot-pressed tees is compensated by the radial movement of the tube blank, so it is also called the radial compensation process. Since the tee is pressed after heating, the equipment tonnage required for material forming is reduced. Hot-pressed tees have wide material adaptability, suitable for low-carbon steel, alloy steel, and stainless steel; this forming process is typically used for large-diameter tees and those with thicker walls. Classification by material: carbon steel, cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, argon-chromium-nickel alloy, pvc, etc. Classification by manufacturing method: top-made, pressed, forged, cast, etc.

VOLKMANN hose connector precautions

Tee water pipe connector, solution for quick-connect water pipe fittings. This method is very fast. Many friends may not be particularly familiar with high-pressure quick-connect water pipe fittings. In fact, this type of water pipe is used for quick connections in faucets, spray guns, and water pipelines. This method is labor-saving and particularly convenient. The method for quick-connecting high-pressure water pipes is as follows: First, install quick connectors on both ends of the water pipe, gently tightening the adjacent nuts. Next, connect to the faucet connector or use the spray gun connector. If you hear a "click" sound during this process, it indicates that the high-pressure water pipe quick connector has been successfully connected. Closed-type water pipe connector method: When the mold connector and mold water nozzle in the high-pressure water pipe quick connector are closed, the female and male heads block the fluid channel under the force of their respective pins and springs when not connected. The pins of both the male and female heads close individually, instantly blocking fluid flow. When in the connected state, inserting the male head into the female head causes the pins to return to their original positions under spring action. Steel balls roll to lock, ensuring a tight connection between the male and female heads. Simultaneously, the pins of the male and female heads push against each other to open, allowing fluid flow. The O ring in the high-pressure water pipe quick connector completely prevents fluid leakage.

VOLKMANN hose connector assembly

Pre-assembly is the most critical step for bite-type tube fittings, directly affecting sealing reliability. Specialized pre-assembly tools are generally required. Fittings with small tube diameters can be pre-assembled in a vise. The specific method involves using one fitting body as the base, tightening the nut and bite ring onto the tube. Main types include bite-type straight tube fittings, bite-type end straight-through fittings, and bite-type tee tube 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, resulting in leaks, a problem that is frequently overlooked. The correct approach is to pre-assemble the corresponding connection end using the same type of fitting body as used on the other end of the tube, thereby minimizing the risk of leakage. The tube end face must be flat and flush. 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 as much as possible; excessive tube misalignment will also cause sealing failure. The pre-assembly force should not be excessive; the inner cutting edge of the bite ring should just embed into the outer wall of the tube, and the bite ring should not show significant deformation. During final pipeline connection, assemble according to the specified tightening torque. The tightening torque for ф6-1 bite rings is 64-1 15n, 16фmmr 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 to achieve better sealing, but the sealant can be flushed into the hydraulic system, causing failures such as clogging of damping orifices in hydraulic components. When connecting pipelines, ensure sufficient deformation allowance for the tube to avoid subjecting it to tensile forces. Avoid subjecting the pipeline to lateral forces during connection, as excessive lateral force will result in poor sealing. Complete the pipeline connection in one go to avoid multiple disconnections, which will also degrade sealing performance.

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