Could you help me figure out what purpose this nut on the valve seat serves?
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Below is the valve model; the medium is high-pressure steam at 9.8 MPa and 330°C. I would appreciate some advice!
The opening is located at the valve’s sealing packing area – what is the purpose of adding lubricant there?
It’s quite rare, right? We just apply butter directly to the screw
This is the glue injection hole on the special clamp used for plugging leaks under pressure; your valve must have had a leak at the valve stem area at some point
Sealing grease injection https://wenku.baidu.com/view/565305c6f021dd36a32d7375a417866fb84ac0a0.html
It seems to be a seal gland leak; it’s used for injecting glue using a syringe, and this is quite common in steam pipelines
6# is the correct answer. When leak points in pipes or sealing areas discovered on-site cannot be repaired immediately, or when the conditions necessary for repair are not available, this type of clamp can be used temporarily to stop the leakage. This is the injection hole used for injecting sealant to stop the leak. This method is quite commonly used on-site by us; it is necessary to maintain a record-keeping system, and once the conditions are met, it must be handled properly.