Safety device for acetylene use - DF3L

DF3L is a safety device. It can be used for filling of acetylene cylinders, the device should be placed on the removable pipe, between the distribution pipe and the container to be filled. It can be installed horizontally, vertically or at an angle. It can also be installed on the high pressure side on a C2 H2 supply equipment as defined in ISO 14114. For its non-return function, the DF3L device is placed immediately downstream of the cylinder or bundle. For its fast-action automatic shut-off function, the DF3L is placed upstream of the pressure regulator of the cylinder or supply equipment.
Key advantages
  • Equipped with a fast-action automatic shut-off device, which cuts off the gas supply under the effect of an explosion due to decomposition of the acetylene or a flash back
  • Equipped with a non-return valve, which prevents gas from flowing in the opposite direction to the normal flow
  • Equipped with a flame arrestor, which prevents a flame from propagating in either direction
  • Approved by validation test according to EN ISO 15615
  • In compliance with the PED 2014/68/EU directive

Product image

Gas usedC2H2
Maximum operating pressure25 bar
Inlet connectionG3/8 female according to ISO 228
Outlet connectionG1/2 male according to ISO 228
Body materialbrass
Total length83,5 Mm
Weight0.33 kg
Body diameter (maximum)30 Mm
Dimensional drawings
Downloadable catalogs, brochures
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    Acetylene Safety Equipment
    Last update: Jun 29, 2023
    Available in: en
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