There are many reasons why the globe valve is not closed tightly. Let's analyze the possible reasons and solutions in detail.

The globe valve may be closed loosely due to the following reasons:
Excessive medium pressure: The fluid flow rate is too high or the air blockage causes excessive pressure, which exceeds the rated flow value of the globe valve.
Improper operation: The operator does not operate or maintain according to the correct steps.
Debris blockage: There are debris blockages in the valve body or the sealing ring is damaged.

The solution to the loose closing of the globe valve mainly includes the following steps:
1. Check the sealing surface and gasket
First, check whether the sealing surface of the globe valve is clean to ensure that there are no impurities affecting the sealing effect. If the sealing surface is scratched or defective, the sealing surface or the entire globe valve needs to be replaced in time. At the same time, check whether the gasket is intact. If the gasket is aged, deformed or damaged, a new gasket needs to be replaced.
2. Adjust the tightening force of the bolts
If the bolts are not tightened enough, it will also cause loose sealing. Appropriately adjust the tightening force of the bolts to ensure that the sealing surface is tightly combined.
3. Check the installation position and connection
Make sure the globe valve is installed in the correct position and there are no loose parts. If necessary, re-fix or re-tighten the screws and connectors to ensure a tight connection with the pipeline.
4. Check the medium pressure
If the fluid flow rate in the pipeline is too high or there is air blockage, the globe valve may not be closed. Check whether the fluid flow rate exceeds the rated flow value of the globe valve. If necessary, adjust the fluid direction or increase the pipe diameter to reduce resistance.
5. Clean up debris and master the operating steps
If there is debris blocking the valve body or the sealing ring is damaged, it is necessary to clean up the debris and replace the sealing ring. In addition, master the correct operating steps and usage methods, and perform regular inspections and maintenance to ensure correct operation.

With the above methods, you should be able to solve the problem of the globe valve not closing tightly. If the problem persists, it is recommended to contact the valve supplier or professional maintenance personnel for inspection and repair.