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FISHER™ DVI Desuperheaters

This desuperheater injects spraywater in the outlet of the venturi section, assuring excellent mixing and rapid atomization. The DVI desuperheater is installed between flanges in DN25 through DN600 (NPS 1 through 24) steam lines. There are no moving parts, and the water injection pattern provides rapid and thorough cooling. It is intended for applications with moderate load changes and low-velocity steam.

Main Features

Precise temperature control, close to saturation. Optimized spray pattern with optional nozzle technology allows a wide operating range for optimal mixing and fast vaporization under all operating conditions
The nozzles can be easily removed, maintained or replaced without having to replace the entire unit
The valve body is made of forged material with no welded seams
Can be installed at any convenient location in the pipeline
Can be mounted on flanged steam pipes
Sizes down to NPS 1

Specifications

Valve Size: NPS 1 to NPS 24
Pressure Rating: ANSI CL150 to 1500
End Connection Styles: RF flanged, RTJ,Wafer
Maximum CV: 9.48
Material: SA105 carbon steel, chromium-molybdenum alloy steel (F22, F91)
Other Configurations: Contact us for more information

Applications

Power industry: auxiliary steam, HRSG interstage cooling, HP/RH thermostat spray
Process Control: Pressure Reducing Stations, Process Steam Relief, High Pressure to Low Pressure Relief, Vent Steam Relief, Auxiliary Steam
Medium load variations and low-flow steam