4″90° emergency shut-off valve, made of aluminum alloy casting with a hard anodized surface treatment and an integrated cylinder design. It is installed at the bottom of the tank truck, directly connected to the pipeline, with an ultra-low and compact valve body size, making it suitable for installations in tight spaces. It serves as a key safety component for the tank truck. The valve body is equipped with a breakaway groove, allowing emergency separation under external force to ensure no leakage of the tank's contents, guaranteeing the safe transport of the tank truck. The product complies with QC/T932-2018 and GB18564.1-2019 standards.