Model CSDV Thermostatic Drain Valves

For freeze protection of condensate systems up to 300 psig (20.7 bar) (2068 kpa)

The Armstrong Condensate Sensing Drain Valve
(CSDV) is an automatic valve with a thermostatic wax-filled capsule. The
valve is designed for winterization of steam tracing, instrument
tracing, condensate return line freeze protection or other processes
requiring protection under 150°F (65°C). The valve has an all-stainless
steel body, fittings, spring and plug. It is sensitive to temperature
only, and it can be easily installed in any orientation with a pipe
wrench.

Since the CSDV discharges below steam temperature,
the valve maintains a water seal that prevents live steam loss.
However, such operation may induce condensate corrosion in the process
line; therefore, use should be limited to applications such as tracing
lines that discharge to the drain. The unique ram-type plug and seat
provide reliable, tight shut-off for longer periods than any other type
available. A sized orifice and control port act together as a labyrinth
restrictor to keep live steam loss to a minimum on failure. CSDVs are
100% factory tested.

The CSDV responds only to condensate temperature.
After condensate cools to near set-point, the CSDV modulates flow to
maintain a constant condensate discharge temperature. Wide open at
start-up for rapid venting and initial heat up, the CSDV is also
self-draining after shut-off, to eliminate freeze damage. Typical
set-points (°F) are 105, 125, 180, 210 and 240 (°C 40, 51, 82, 99 and
115).

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