W21.8LH to hose converter

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It's very useful to organize defense gas supply for the semi-automatic welding machines via combination of two pressure regulators. First works as a gas flow regulator and operates on 3-4 bar pressure. After the welding machine valve close some volume of gas inside of gas hose stay under this pressure. At the first moment after valve opens this volume of gas makes Puhhh before flow regulator resume to work. To avoid gas lose the intermediate low pressure regulator (i.e. propan or natural gas) could be used right after flow regulator. Such regulators frequently has W21.8 Left Hand(СП 21.8) connection threat at the inlet. This thing was elaborated to perform interconnection of outlet of flow regulator and inlet of pressure regulator via Dn9 hose. You can print the base and the tree part separately and after glue them with DCM or print assembled part (more simple but less accurate surfaces). The PTFE pipe (4.05mm OD) and gasket are optional but using them you make construction more quality and hermetic. The gasket may be printed from Flex TPU. Printing positioning is presented in pictures. For the "tree" part recommends to use 2-layer skirt