Variable orifice desuperheater
VO-II, VO-76 Copes-Vulcan

The Copes-Vulcan VO-76 is especially well suited for high pressure and temperature service (e.g. ANSI 1500 and above). It is particularly adaptable where custom fitting to new or existing piping is a problem. The VO-76 provides alternatives where limited space or changes in header diameter are factors.

Features:

- The VO II offers extremely fine control and exceptional turndown that is limited only by the rangeability of the coolant control valve itself. Typically the unit can achieve a rangeability of 100:1 when matched with a Copes-Vulcan control valve fitted with Cascade trim design.
- Due to excellent mixing of vapor and coolant, control is possible throughout the entire operating range to within 5 °F (2.5 °C) of the set point, which can be as close as 10 °F (5 °C) above saturation.
- The coolant pressure, which is required at the inlet to the VO II need only be 5 PSI (0.35 bar) above the pressure of the vapor being desuperheated.
Since virtually all the desuperheating occurs within the body itself, usually no pipe liners or long downstream straight pipe runs are necessary.