Pressure of the dry gas seal
Thread Content
I have a gentle question: many pumps use dry gas seals. If nitrogen is used as a seal for liquefied gas pumps, could this lead to seal failure and result in liquefied gas leaking into the nitrogen? I don’t understand the pressure at the mechanical seal of a pump; is the pressure at the seal of a pump usually high? Please let me know, thanks
Dry gas seals are primarily used to prevent leakage of the medium inside the pump and to protect the environment. When using nitrogen to seal a liquefied gas pump, the pressure of the nitrogen is usually slightly higher than that of the liquefied gas inside the pump, in order to ensure a good seal and prevent the liquefied gas from leaking out. If the pressure of nitrogen is properly controlled, the seal usually functions effectively, and no liquefied gas leaks into the nitrogen. As for the pressure at the mechanical seal of the pump, this pressure is usually related to the operating pressure inside the pump, and its level depends on the specific pump and the properties of the medium being pumped. In many cases, this pressure can be relatively high, especially when dealing with high-pressure or volatile liquids. Therefore, the design of the seal and pressure management are crucial to ensure safety and efficiency. .
It is recommended to create a mechanical diagram of the equipment; by referring to the process conditions of that pump, you will be able to solve your problem. For reference.
The requirement is that the pressure set in the sealed chamber be higher than that in the pump chamber; a low-pressure alarm is installed in the sealed chamber, so there is no risk of leakage.