Desuperheater Advantages

Turndown ratio		Compact designs		Outlet superheat		Materials
Pressure drop		Design codes		Water conditions		Orientation

Outlet superheat

In desuperheater applications, steam temperature is often referred to in "degrees superheat". For example, 75 psig steam is saturated at 320 degrees F (5.17 bar g at 160 degrees C). If 75 psig steam is at 400 degrees F (204 degrees C), it has 80 degrees F superheat (44 degrees C superheat). Outlet superheat for desuperheaters typically must be as close to saturation as possible. Outlet superheat is limited by the type of controls used to regulate the system, and by the desuperheater style selected for the application.

Graham Double-Venturi and Steam-Atomizing desuperheaters are capable of providing desuperheated steam 10 degrees F above saturation.
The Single-Venturi design can provide steam with 20 degrees F of superheat.

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