Radium - Roll Over and Dynamic Safety Vent Valves

Radium Engineering vent valves feature roll-over protection for fuel cells and gas tanks. The valves come in different varieties for all fill type applications; standard fill and quick-fill. Simply put, the larger the vent, the quicker the fuel cell can be filled. 

Rollover Valve
The roll over vent valve comes standard in all FCST-X models and can be used for other fuel tanks that have 12AN ORB female threads. The large external 8AN male fitting is more than enough for all standard fuel filling. The 1-piece machined part is manufactured from billet 6061 aluminum and type-II anodized. Included is 1 ball valve, FKM O-ring, and a stainless steel retaining ring.

In case of an inverted accident in which the wheels are up-ended, the ball valve sinks sealing the vent. This safely prevents fuel from leaking out of the fuel cell vent line.

Dynamic Safety Valve
The "QUICK FILL" Dynamic Safety Valves must be used when adding the dry break refueling system to the FCST, FCST-X, or any filler with a 12AN ORB female threaded vent port. The 1-piece machined part is manufactured from billet 6061 aluminum and type-II anodized. The DSV determines when the tank is full when the upper sealing ball valve floats to the top shutting off the air (vent) source. This safely prevents fuel from traveling up and out of the fuel cell vent line. The DSV serves 2 main purposes, fuel fill shut off and roll over protection.

Dry breaks are unique in that they seal the fill line during refueling. When the tank becomes full and the DSV valve shuts off the vent, a small amount of pressure will build in the fuel cell. This low air pressure is determined by the height of the dump can with respect to the lowest part of the fuel cell (a larger distance will result in higher head pressure). The dump can will begin to "chug". This is by design as it informs the operator that the fuel cell is full and the dry break can now be released. The residual air pressure will make its way out of the vented dry break receiver and permit the fuel level to rise slightly in the tank.

DSV Extension
When installed with a DSV, the extension adapter will effectively move the air shut-off point higher in the system to allow even more fuel into the cell and fill neck before shutting off. For higher remote fill locations that need to maximize the amount of fuel that can be put into the cell, this is the perfect solution.

This will efficiently speed the refueling process by preventing dump can chugging before the cell is full. Radium DSV valves must be purchased separately.

5-Bolt SAE Adapter
To use a Radium Engineering DSV on a very early model FCST that has 8AN ORB vent threads (20-014X-XX), the 5-bolt SAE adapter can be used in the level sender location. A fuel level sender cannot be used with this adapter in place.

Use with part 14-0434 12AN ORB to 12AN Male fitting.