Armstrong free-floating lever dual gravity drain traps are identical to Armstrong’s 2-LD, 3-LD and 6-LD, except float weights are modified to make them suitable for draining water from a light liquid. If you wish to use them for draining any liquid with a specific gravity other than 1.00, consult the Armstrong Application Engineering Department.
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Floats for dual gravity drain traps are weighted with quenching oil, which, in the unlikely possibility of float failure, may be dispersed through the system. If this is a hazard, consult the Armstrong Application Engineering Department.