Boiler and steam desuperheater control valves

Based on your description, the boiler and steam desuperheater control valves are leaking severely, which prevents them from being used in automatic mode. You can try the following steps to resolve this issue: 1. Inspect the valves: First, it is necessary to conduct a thorough inspection of the valves to determine the cause of the leakage. This could be due to aging, damage, or improper installation of the valves. 2. Replace parts: If a certain part of the valve is severely damaged, it may be necessary to replace it with a new part. If the seal ring inside the valve is damaged or worn out, a new seal ring needs to be replaced. 3. Strengthen the valve: If the valve’s mounting is loose, it may cause internal leakage; in such cases, the valve needs to be tightened again or a new mounting device installed. 4. Use specialized tools: If the internal leakage problem still cannot be resolved, it may be necessary to consider using specialized repair tools or equipment, or to have professional technicians carry out the repairs. 5. Replace the valve: If none of the above methods solve the problem, then considering the replacement of the valve with a new one may be the last option. It should be noted that any of the operations mentioned above should be carried out while ensuring safety; if one lacks the relevant knowledge and experience, it is recommended to seek help from professionals. .

Replace~~, select a new model according to the process requirements

How long can your cooling water flow control valves generally operate in automatic mode?

If it’s valuable, repair it; if not, just replace it with a new one

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Generally, a gate valve is used inside; it should be disassembled and repaired by a professional manufacturer: grinding and patch welding； turning ； Replacing the valve plate, etc., costs around 8,000 yuan

Given your situation, it can be basically determined that the valve in question is likely a single-seat or double-seat control valve. There are various reasons for internal leakage in such valves; one can start by disassembling them to check whether there is any damage to the valve stem and seat. If no damage is found, it’s necessary to verify whether the valve stem is fully closed during installation and adjustment. If there is a handwheel, trying turning it could help determine the issue. Steam valves may experience poor sealing of their internal components due to cavitation or flashing. However, there should not be any major issues with the automatic adjustment of the valve; it’s most likely that there are problems with the parameter tuning of the PID control. By carefully tuning the PID parameters, the quality of regulation will definitely see a significant improvement. At the same time, it is necessary to examine the flow characteristics of the valve itself, as the DCS configuration must be consistent with those of the valve.

Did you miss it all? What else can be done? Take it offline for repair.

A filtering device is installed at the front; the valve core is treated by spraying, and it is designed in a sleeve format