Our hydraulically operated vapor recovery adapters are manufactured from 316L stainless steel investment castings and are electropolished for easy cleaning. The standard unit can be supplied with a 3” straight threaded female swivel outlet for mounting on a 3” clean-out nipple and one or two 2” NPT outlets to allow for both top and bottom vapor recovery. The adapter is closed in transit and opens consecutively with the tanks’ hydraulic internal valve using the existing hydraulic hand pump. The external hydraulic cylinder is completely isolated from the tanks’ lading. The main sealing surface is a Teflon® encapsulated O-Ring (Tef-O-Sil), which is compatible with most chemicals. The adapter is designed to be “Cleaned-In- Place” without removing the assembly from the tank trailers pipework. A fluorescent orange indicator provides positive visual confirmation that the valve is open and can be seen from ground level. An additional provision has been added to enable the use of a variety of valve position sensors. This assembly has an effective flow-through area of 2”, which should be more than adequate to handle most industrial vapor recovery applications. The unit can also double as an air-unloading device.