Metall- und Apparatebau hose fittings, German Metall- und Apparatebau models, Metall- und Apparatebau prices

Metall- und Apparatebau hose fittings are components used to connect hoses to other hoses or components. Hoses include stainless steel hoses, metal hoses, corrugated hoses, rubber hoses, plastic hoses, and other types; hose fittings vary by hose type. Materials for metal hose fittings mainly include stainless steel, nickel-plated copper, and zinc alloy. Shapes mainly include external thread end fittings, external thread 45-degree elbows, external thread 90-degree elbows, internal thread fittings, self-locking fittings, and compression fittings. Metal hose fittings can be selected based on installation conditions and operating environment.

Metall- und Apparatebau hose fitting precautions

Hydraulic quick-disconnect couplings (quick couplings) are devices used to connect two pipelines, typically in heavy-load equipment such as large construction machinery. Quick couplings ensure the safety of hydraulic hoses and guarantee connection stability in extremely high-pressure hydraulic applications. Quick couplings come in push-to-connect and threaded types, and are generally single-acting self-sealing, meaning that when the male and female halves of the quick coupling are fully separated, each side is semi-sealed. 1. When the quick coupling is connected, its internal valve stems push against each other to open, simultaneously achieving communication between the pipelines on both sides and enabling rapid pipeline connection functionality. 2. After disconnection, the hydraulic hose connectors remain semi-sealed to prevent hydraulic oil leakage, avoiding oil leaks and contamination of the hydraulic control system; therefore, hydraulic quick couplings are widely used in large construction machinery that requires frequent assembly and disassembly. 3. During assembly and disassembly, it is necessary to ensure proper mating between the quick coupling and the hydraulic hose connector to prevent damage to the quick coupling that could lead to oil leakage or contamination. 4. Improper connection or design flaws in quick couplings may cause damage to hydraulic components, potentially leading to mechanical failures or accidents.

Metall- und Apparatebau hose fitting classification

Fitting structures are broadly categorized into three types: screw-type, flange-type, and quick-connect type: 1. Screw-type: For metal hoses with nominal diameters below 50 mm operating under higher working pressures, screw-type fittings are predominantly used. After tightening the threads, the internal and external tapered surfaces of the two fittings mate tightly to achieve sealing. The cone angle is generally 60 degrees, though 74 degrees is also used. This structure offers good sealing performance, but concentricity of the two mating parts must be ensured during installation. To address common issues in practical engineering such as repeated disassembly/assembly and difficulty achieving concentricity, the fitting can be designed with a tapered surface mating with a spherical head. 2. Flange-type: For metal hoses with nominal diameters above 25 mm operating under general working pressures, flange-type fittings are predominantly used, sealing via a tongue-and-groove mating arrangement. A loose flange, capable of radial rotation and axial sliding, connects the two bodies under the tension of tightening bolts. This structure provides good sealing performance but is difficult to manufacture, and the sealing surfaces are prone to damage. For special applications requiring rapid release, the holes for the tightening bolts can be slotted to create a quick-release flange. 3. Quick-connect type: For various metal hoses with nominal diameters below 100 mm, quick-connect types are generally used where rapid assembly and disassembly are required. They commonly use "O"-shaped seals made of fluoroplastics or special rubber for sealing. When the handle is moved through a certain angle, it acts like locking the claws of a multi-start thread; the tighter the "O"-shaped seal is compressed, the better the sealing performance. This structure is most suitable for fire scenes, battlefields, and other situations requiring rapid assembly and disassembly. A set of fittings can be connected or disconnected within seconds without any special tools.

Metall- und Apparatebau hose fitting classification

Suitable for both gas and liquid, primarily used in piping for ion cooling units, brewing equipment, cutting oil piping for machine tools, and car wash machines. Connected via simple lever operation, they can transport liquids, gases, powders, etc. Body materials, sizes, and installation shapes are diverse. Usage precautions: Do not use with fluids other than those specified. Do not exceed the maximum operating pressure during use. Do not use outside the specified temperature range to prevent seal wear or leakage. Do not disassemble; use sealant for pipe threads on external threads. During installation, do not exceed the maximum torque to prevent damage. Do not use for purposes other than quick-connect fittings. Do not connect to quick-connect fluid fittings from other manufacturers. Avoid artificial impact, bending, or stretching to prevent damage. Do not use in environments contaminated with metal powder or sand/dust to prevent malfunction or leakage. Accumulation of debris can cause malfunction or leakage. A brake valve must be installed before the quick-connect fitting. Do not use as a hinged joint. Use in machinery with vibration or shock will reduce durability. Do not use water or glycol-based media with steel or iron quick-connect fittings, as the zinc coating will dissolve. The fluid used must be clean and filtered. "O" seals must remain lubricated with oil during use. For hydraulic applications, the body material should be metal resistant to vibration and shock. Sizes and installation shapes are diverse. Usage precautions: Do not use with fluids other than those specified. Do not exceed the maximum operating pressure limit of the quick-connect fitting during use. Do not use outside the specified temperature range to prevent seal wear or leakage. Do not disassemble when hydraulic pressure is present; use thread-specific sealant for external pipe threads. During installation, do not exceed the maximum torque to prevent damage. Do not use for purposes other than quick-connect fittings. Do not connect to quick-connect fluid fittings from other manufacturers. Avoid artificial impact, bending, or stretching to prevent damage. Do not use in environments contaminated with metal powder or sand/dust to prevent malfunction or leakage. Accumulation of debris can cause malfunction or leakage. A brake valve must be installed before the quick-connect fitting. Do not use as a hinged joint. Using in machinery with vibration or shock reduces durability. Do not use water or glycol-based media, as these substances dissolve the zinc coating. The fluid used must be clean and filtered. "O" seals must remain lubricated with oil during use. Fluid flow velocity during use should be kept below 8m/s. Refer to the end section of these precautions to confirm suitable seal and body materials for the fluid being used.

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