4″180° emergency shut-off valve, the main body is made of aluminum alloy casting with a hard anodized surface treatment, featuring an integrated cylinder design. It is installed at the bottom of the tank truck and can be directly connected to the pipelines on both sides, serving as a critical safety component for thetank truck. The valve body is designed with a breakaway groove that allows for emergency separation under external force, ensuring that the tank's contents do not leak, thus guaranteeing the safe transportation of the tank truck. The product complies with QC/T932-2018 and GB18564.1-2019 standards.