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ARCA Regler GmbH
Kempener Str. 18
D-47918 Tönisvorst
[ T ] +49(0)2156-7709 0
[ F ] +49(0)2156-7709 55
[ @ ] sale@arca-valve.com


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Boiler Feedwater Reservoir

1. Heating Steam Control Valve
The boiler feedwater is degasified in the degasifier on the boiler feedwater reservoir to all but remove the harmful gases of oxygen and carbon dioxide. This process takes place largely under overpressure (p = 0.1 - 0.4 barg), with a corresponding saturated steam temperature of 102 to 108 °C. The boiler feedwater tank is heated by a steam lance, placed in the liquid to mix it, and by adding steam from above. The steam is routed through the heating steam control valve, which must be fitted with noise-reducing fixtures (series 8C, 6N).

2. Boiler Feedwater Control Valve
This valve is used to regulate the boiler drum to ensure that there is always enough feedwater in the boiler to create steam. The boiler feedwater control valve must have an equal-percentage characteristic to compensate for the difference between the characteristic of the boiler feedwater pump and the boiler plant (series 8C, 6H, 350, 380).

3. Deionized Water Control Valve
Losses are encountered in the water-steam circuit as a result of desalination, desludging, and sampling but can be compensated with deionized water from the water treatment plant. Contaminants trapped in the untreated water in dissolved and solid form are removed in this plant. The deionized water control valve feeds the deionized water to the boiler feedwater circuit (series 8C, 6N).

4. Condensate Control Valve
The condensate that accumulates throughout the entire plant is fed back to the water-steam circuit using condensate control valves. Subsequent evaporation may occur as the condensate expands, depending on the pressure and temperature, and must be taken into account when selecting the cvs value and nominal outlet diameter (series 8C, 6N, 350).

5. pH Control Valve
The pH value of the deionized water is controlled by adding ion exchangers in the water treatment plant. Today, this task is assumed primarily by metering pumps but can also be carried out using pH control valves (series 8C).

The ARCA team
Mahmoud Odabai
Senior Engineer
[ T ] +49 (0) 2156/7709-102
[ F ] +49 (0) 2156/7709-4102
[ @ ] of@arca-valve.com
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