Thermostatic Drain Valve – Model CSDV | Armstrong | Americas

Thermostatic Drain Valve – Model CSDV

Thermostatic Drain Valve – Model CSDV

Product Specifications

Model CSDV
Maximum Operating Temperature Saturated Steam Temperature
Body Material 304 Stainless Steel
Maximum Operating Pressure 300 psi
(21 bar)
Connection Type Screwed
Connection Size (inches) 3/8″ (12 mm)
1/2″ (15 mm)
3/4″ (20 mm)

Thermostatic Drain Valve – Model CSDV

Model CSDV (Condensate Sensing Drain Valve) 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 Model 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 Model 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).