specken drumag hose fittings Germany specken drumag model specken drumag price

specken drumag hose fittings are translated from the English word bushing, professionally known as reducing fittings. They are generally manufactured by cutting and forging hexagonal bars, with various thread types used. They connect internal and external threaded pipe fittings of two pipes with different diameters and play an irreplaceable role in pipe connections.

specken drumag hose fitting functions

connects the braided sleeve with the entire bellows. Meanwhile, the fitting is also a component that connects metal hoses to other pipe accessories and equipment. It ensures the medium works normally in the pipeline system. The material of the fitting is usually the same as that of the bellows and braided sleeve, mostly stainless steel. When transporting non-corrosive media, some metal hoses with larger diameters can be made of carbon steel. Metal hose fittings for corrosive media (if designed) take appropriate measures to avoid contact with the medium and can also be made of carbon steel. The structure of the fittings is roughly divided into three categories: screw type, flange type, and quick-connect type. Under high working pressure conditions, fittings for metal hoses (explosion-proof hoses) with a thread diameter less than 50 mm are mostly threaded. After tightening the threads, the inner and outer conical surfaces of the two fittings fit tightly to achieve sealing. The cone angle is usually 60 degrees, while 74 degrees is also useful. This structure has good sealing performance, but concentricity of the two mating parts must be ensured during installation. To solve the problems of repeated disassembly, assembly, and concentricity often encountered in actual projects, the fitting can also be designed to match the conical surface with a ball head.

specken drumag hose fitting manufacturing process

Stamping forming: Stamping forming elbows were the earliest forming process applied to mass production of seamless elbows. In the production of common specification elbows, they have been replaced by hot pushing or other forming processes. However, they are still used for certain specifications due to small production quantities, excessively thick or thin wall thicknesses, or special product requirements. Stamping forming of elbows uses pipe blanks with an outer diameter equal to that of the elbow, directly pressed into shape in a die using a press. Before stamping, the pipe blank is placed on the lower die, the inner core and end die are inserted into the pipe blank, and the upper die moves downward to start pressing. The elbow is formed through the constraint of the outer die and the support of the inner die. Compared with the hot pushing process, the appearance quality of stamping forming is inferior. During the forming of stamped elbows, the outer arc is in a stretched state, with no excess metal from other parts for compensation, so the wall thickness at the outer arc is reduced by approximately 10%. However, due to its suitability for single-piece production and low cost, the stamped elbow process is mostly used for small-batch, thick-walled elbow manufacturing. Stamped elbows are divided into cold stamping and hot stamping, typically chosen based on material properties and equipment capabilities. The forming process of cold-extruded elbows uses a dedicated elbow forming machine. The pipe blank is placed in the outer die, and after the upper and lower dies close, the pipe blank moves along the gap reserved between the inner and outer dies under the push of the push rod to complete the forming process. Elbows manufactured using the inner and outer die cold extrusion process have a beautiful appearance, uniform wall thickness, and small dimensional deviations. Therefore, this process is mostly used for forming stainless steel elbows, especially thin-walled stainless steel elbows. This process requires high precision for the inner and outer dies and has strict requirements for the wall thickness deviation of the pipe blanks.

specken drumag hose fitting specifications

Quick-connect fittings mainly include brass fittings, plastic fittings, and stainless steel fittings. Pneumatic quick-connect fittings are primarily used for air piping and pneumatic tools, allowing pipeline connection or disconnection without tools. Fitting specifications are divided into: PC straight connectors, PL elbow connectors, PB tee center connectors, PD tee side connectors, PXY type center connectors, PE tee reducing connectors, PE tee full-insert connectors, PY tee Y type connectors, PN series Y type reducing connectors, PV straight double-insert connectors, PU straight double-insert connectors, PG straight reducing connectors, PZ cross-type four-way full-insert connectors, PHZ cross-type four-way reducing connectors, ZR four-way threaded connectors, PLL extended right-angle connectors, PLM right-angle bulkhead connectors, PLF right-angle female thread connectors, etc.

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