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July 24, 2013

SDL Atlas Improves Automatic Gas Controller

The American Society for Testing and Materials (ASTM) International has recently revised the D6413/D6413M Standard Test Method for Flame Resistance of Textiles. This test method determines the vertical flame resistance of a textile in response to a standard ignition source, deriving measurement values for afterflame time, afterglow time, and char length. In response to this update, SDL Atlas has modified their Automatic Gas Controller (AGC) which is used in the SDL Atlas Vertical Flammability Chamber and the Atlas HVUL2 Horizontal Vertical Flame Chamber.

The AGC modification specifically addresses the distance between the solenoid valve and burner which, as in the previous standard, could allow the flame to linger past the test’s termination. Originally the solenoid was built into the AGC main unit and connected by a short gas hose which. When the gas supply was shut off, the residue gas inside the connection hose could continue to ignite the burner. This lingering effect could prolong the flame application time. 

SDL Atlas representatives worked diligently with the ASTM committee in drafting the standard update to eliminate this lingering effect by bringing the solenoid valve closer to the burner. With the enhanced SDL Atlas AGC burner, the solenoid valve is installed just next to the Bunsen burner, within the distance that required by the ASTM D6413 update.

All new SDL Atlas Vertical Flammability Chambers and Atlas HVUL2 Horizontal Vertical Flame Chambers will have the modified AGC effective immediately. Additionally, existing users can get a solenoid retrofit kit for their existing AGC and easily convert their machine to the new arrangement.

The SDL Atlas Group of companies offers the largest range of textile testing equipment, supplies, consumables, and services available from a single source. With its own offices in the United States, Hong Kong and China, plus agents in over 100 countries, SDL Atlas is ready to support its customers anywhere in the world. The goal of SDL Atlas is to provide customers with the most complete solutions at the best value.

For more information, visit or contact an SDL Atlas solutions expert:

-          (US) T: +1 803 329 2110; E: [email protected] 

-          (Hong Kong) T: +852 3443 4888; E: [email protected] 

-          (China) T: +86 755 2671 1168; E: [email protected] 

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