Armstrong’s cast iron, free-floating guided lever drain traps use the same bodies, caps, lever mechanisms, valves and seats as Armstrong inverted bucket steam traps that have been proved 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.
As water begins to fill the body of the trap, the float rises, opening the discharge valve. Motion of the free-floating valve lever is guided to provide precise closure. (See drawings.) The opening of the valve is just wide enough to remove liquid as fast as it comes to the trap. Thus at times, the valve is barely cracked from the seat.
FREE-FLOATING LINKAGE VALVE
A hemispherical ball-shaped valve is attached to linkage that is suspended freely on two guide pins. There is no fixed pivot, nor are there rigid guides. Therefore, the attachment is loose. There are no critical alignments, and the lever and valve may move in all directions.
Consequently, the lever may move the valve to the seat in any alignment. As the valve approaches the seat, the pressure pushes the round valve into the square edge orifice of the seat, effecting a line seal to attain bubble-tight closure. (See drawings.)
32-LD Armstrong D556508 Lever Drain Trap
Armstrong’s cast iron, free floating lever drain traps 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. 2-LD, 3-LD and 6-LD cast iron traps are identical in design, materials and workmanship to those for saturated steam service up to 300 psig (21 bar) with the exception of the addition of a guidepost to assure a positive, leaktight valve closing under all conditions.
6-LD Armstrong Free Floating Lever Drain Trap
Armstrong’s cast iron, free floating lever drain traps 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. 2-LD, 3-LD and 6-LD cast iron traps are identical in design, materials and workmanship to those for saturated steam service up to 300 psig (21 bar) with the exception of the addition of a guidepost to assure a positive, leaktight valve closing under all conditions.
11-LD Armstrong Stainless Steel Liquid Drainer
Armstrong’s stainless steel, free-floating guided lever drain traps use the same bodies, caps, lever mechanisms, valves and seats as Armstrong inverted bucket steam traps that have been proved 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 11-LD, 22-LD and 13-LD stainless steel traps 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, leak-tight valve closing under all conditions.
181-LD Armstrong Stainless Steel Liquid Drainer
Armstrong’s stainless steel, free-floating guided lever drain traps use the same bodies, caps, lever mechanisms, valves and seats as Armstrong inverted bucket steam traps that have been proved 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 11-LD, 22-LD and 13-LD stainless steel traps 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, leak-tight valve closing under all conditions.