1. Emergency Shut Valve is installed on the bottom of the tanker, the top parts is tightly sealed inside the tanker. When pipeline or valve is broken suddenly, it will keep the tanker still tightly sealed to avoid the fuel leaking out to improve the safety during transportation. The main body is made of 304 Stainless Steel under the precision die casting with the advantage of simple structure, longer service life,easy servicing,ect.It can be made of 316 Stainless Steel if need. But please inform us before order.