The AMF pneumatically operated pressure compensated Bottom Valve, functions as a primary valve, and is an internal self-closing stop valve, and developed to transport hazardous goods as per ADR, SANS and European Standards. This new version of the Bottom Valve was developed and manufactured to meet ever-changing industry and customer demands for the transportation of an even wider range of multiple products categories than ever before. In conjunction with the correct road tanker design, this valve enables the end-user to heat the outer jacket of the valve via steam, to prevent temperature sensitive products from solidifying inside the valve body.