Raval ACS Ltd is an Israel-based company engaged in the development and marketing of venting valves. Its products include: Roll Over Valve (ROV), for venting of the fuel tank during normal operation and sealing off the venting openings of the valve in the event of vehicle roll over to eliminate any harm due to fuel escaping from the tank; Fill Limit Venting Valve (FLVV), for ventilation of the tank until the maximum filling volume is reached and as long as the float is not submerged in fuel, for increasing the capacity of fuel in the fuel tank to the predesigned fuel height set by the fuel tank designer and for roll over protection in the event of vehicle roll over; Inlet Check Valve (ICV), for allowing the fuel to flow into the tank during refueling, minimizing the flow of fuel up the filler tube, as well as restricting gases for improved environmental protection, and shutting the valve door in the event of vehicle roll over; Liquid Trap (LP), and Filling Limit Valve (FLV).