Fixed Nozzle Desuperheater (FND)
Features- Single nozzle Kv as low as 0.0162 m3/hr and as high as 1.6 m3/hr
- Number of nozzles limited only by pipeline diameter
- For use on all pipe sizes 6" and above
- Ideal for use in conjunction with water control valve and control system
- Turndown ratio up to 4 : 1 (Depending on water quantity)
Notes
- Minimum pipe size required for installation of FND is 150mm
- Water pressure should be minimum 7 bar more than the steam pressure
- maximum recommended pressure difference between steam and water is 45 bar. if it exceeds 45 bar then install pressure control valve in waterline to reduce water pressure within limits
- Spray water should be very clean (equivalent to boiler feedwater)
- IBR approval shall be provided for individual components
- Turndown ratio up to 1 : 4
Typical Sizes
- Steam side flange : 4" and water side flange 1" / 1 1/2" OR Steam side flange : 6" and water side flange 2"
- Pressure rating :upto ANSI #2500
Advantages
- Custom made for any size, standard or range
- Simple installation
- Can be used for higher pipe size and low steam pressure
- No moving parts