The DuPont statement stated that through an assessment of human health and toxicology findings, DuPont believes that exposure to ammonium perfluorooctanate will not cause cancer in humans and pose no health risk to the general public. As of now, there are no known cases of adverse human health effects caused by ammonium perfluorooctanoate, even among workers who are exposed at a much higher level than ordinary people.
DuPont said that during the entire assessment process, the US Environmental Protection Agency's Scientific Advisory Committee has stated that it needs more human health data to consider the relevance of human health data and risk research. We agree with this view and believe that workers who are the most exposed population have the most relevant health data and should be fully considered in the US National Environmental Protection Agency's final risk assessment report, not just relying on animal testing models.
DuPont is conducting an employee health study on ammonium perfluorooctanoate, and its phase results show that there is no correlation between exposure to ammonium perfluorooctylate and most of the tested health indicators. The only possible link is some (but not all) of the workers in the highest exposure levels, with a slight increase in cholesterol indicators. It is unclear whether this link is caused by exposure to ammonium perfluorooctanoate or whether it is related to other factors. DuPont is consulting relevant experts to design and implement the next phase of health testing.
Installation steps for SANY hydraulic cylinder seals
1. Preparation: Clean the working surface and seals, and check if the seals are damaged or deformed.
2. Apply lubricant: Apply a layer of lubricant to the seal and sealing groove.
3. Install the seal: Place the seal into the sealing groove, ensuring that the seal is fully embedded in the groove.
4. Install O-ring: Install the O-ring above the seal, ensuring that the O-ring is fully inserted into the groove.
5. Install the piston rod: Insert the piston rod into the seal and O-ring, ensuring that the piston rod fits tightly with the seal and O-ring.
6. Install the sealing sleeve: Place the sealing sleeve on the piston rod to ensure that it fits tightly with the piston rod.
7. Tighten the nut: Use the nut to fix the sealing sleeve on the hydraulic cylinder, ensuring that the sealing sleeve is secure.
8. Check the sealing effect: Operate the hydraulic cylinder and check if there is any leakage in the sealing element. If there is any leakage, reinstall the sealing element.
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