Maintenance of high-doping valves
Thread Content
Our high-doping valves are not working well lately; it’s difficult to turn them on and off, their response is slow or they don’t move at all. Is it a problem with the valve core? Is there any good solution? I have a question for everyone: is corrosion severe in your high-doping valves?
I wonder what type the original poster’s high-dilution valve is, what material the valve core is made of, and what medium is used to protect the valve core? What is the typical opening degree of the valve?
We generally use deoxygenated water for protection; when the concentration is high, a jacket is used. The condensate water resulting from heat exchange returns to the first, second, and third coolers, where it is recycled. Avoid waste. The valve core corrosion was also acceptable; it was replaced after about three years of use. Due to corrosion caused by high temperatures, sulfur, as well as the scouring effect of hot air currents, there are of course many corrugated corrosion patterns.
I wonder if the poster uses the SSR high-temperature blending process? If it’s their technology, it is said that the high-temperature mixing valve is a patented product. The valve core in this device is made of ceramic, and it is cooled by deoxygenated water; therefore, it is essential not to interrupt the supply of this deoxygenated water during use. If the supply is interrupted, the valve core will be damaged, and the valve will lose its regulating function.
Low-pressure steam is generally used to cool the mixing valve. Or use nitrogen for protection
The valve spool used in our device’s high-temperature blending valve is made of ceramic material. During use, it is necessary to avoid close contact between the valve core and the valve seat, as this can easily cause the valve core to get damaged or the valve seat to deform. There is no protection.
Are the high-doping valve and the mixing valve the same concept? I’m sorry; I’m new to this, so please forgive my ignorance.
Depending on the material, deoxygenated water or low-pressure steam can be used to cool the mixing valve body, while the valve stem is protected with nitrogen. No matter what the material is, the opening degree of a highly doped valve should not be set too low, as this can easily damage the valve core (ceramic materials can cause the valve core to get stuck). Pay attention to various protective measures to ensure that the highly doped valve operates properly.
SSR uses high-temperature mixing, so it places high demands on valves. We use low-temperature mixing here; the valves are equipped with internal linings and external steam heating. The performance is satisfactory – as long as the steam heating is adequate, sticking problems generally do not occur.
Ours uses boiler feed water for cooling, and there is also steam tracing, which is used to prevent sulfur from condensing