For freeze protection of condensate systems up to 300 psig (20.7 bar) (2068 kpa)
The Armstrong Ambient Sensing Drain Valve (ASDV)
is deal for protecting piping, valves, fittings, pumps, condensate
systems, safety showers, fire lines, spray nozzles and freeze-sensitive
equipment. It also can be used to provide back-up protection on
steam-traced systems or equipment. The valve features an all-stainless
steel body, fittings, spring and plug. It is unaffected by pressure
variation, is sensitive to temperature only, and can be easily installed
with simple wrenches.
Trying to provide freeze protection manually with
valves cracked for continuous drainage is wasteful and possibly
susceptible to freezing. The ASDV automates freeze prevention and
reduces waste by opening only when freezing is imminent and closing when
the danger is past. The valve minimizes water loss and completely
eliminates damage and downtime. The ASDV’s unique ram-type plug and seat
provide reliable, tight shut-off longer than any other design, and all
valves are 100% factory tested.
The ASDV thermal element senses ambient
temperatures and at a preset temperature, the drain valve will open.
Water from the line will then flow past the element. If the water
temperature becomes high enough, the valve will close. If the water
temperature is low, the valve will modulate to maintain temperature or
will open to drain completely. The valve will be fully open at 35°F
(2°C). As the temperature rises, the valve will be tightly closed at