Armstrong all Stainless Steel Free Floating Lever Drain Trap 11-LD, 22-LD & 13-LD (Liquid drainer = Air trap)
Armstrong auto drain trap (liquid drainer)


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Armstrong’s all stainless steel, free floating lever drain traps 11-LD, 22-LD & 13-LD 
It use the same bodies, caps, lever mechanisms, valves and seats of Armstrong inverted bucket steam traps that have been proven in years of service. Elliptical floats and high leverage make it possible to open large orifices to provide adequate capacity for drain trap size and weight. 

The hemispherical valve, seat and leverage of the all stainless steel drainer are identical in design, materials and workmanship to those for saturated steam service up to 570 psig (39 bar) with the exception of the addition of a guidepost to assure a positive, leaktight valve closing under all conditions.

Download drain trap sizing chart
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When air or gas is compressed inside a compressor
It will produce condensate (water)
The condensate inside the air or gas piping will create problems as follows:
- Water hammer that can damage the system
- Corrosion 

Body Material Sealed Stainless Steel 304-L
Internals Stainless Steel
Max. Allowable Pressure 500 psig @ 100°F (35 bar @ 38°C) ; 440 psig @ 500°F (30 bar @ 260°C)