Articulated Floating Roof Drain

Rainwater that collects on an external floating roof has to leave the tank without mixing with the product. The Vens articulated roof drain carries it from the roof sump down through the tank to a valve on the shell, using rigid pipes joined by swivel joints that fold and open as the roof rises and falls.
Rigid pipe with sealed swivels avoids the kinking and abrasion that hose drains can suffer, and the joints are built to stay tight against the product pressure outside them. A check valve at the roof sump can be fitted to stop product entering the drain if the line is ever damaged.
External floating roof crude and product tanks
Tank farms in refineries, terminals and depots
Replacement of worn hose-type roof drains
Send us the tank diameter and height, the roof sump position and the shell nozzle details for a quotation.
Product datasheet: Vens floating suction units (PDF).
Vens has more than 10,000 installations. Every unit is designed by engineers who studied at MIT, Stanford, Cornell, the IITs, Arizona State University and the University of Cincinnati and have worked in the industries that use this equipment, so it is sized for the job, built in the right materials and designed to proper factors of safety.