Finally, we also control the standard of every component and each step in the manufacturing process. A dedicated team of customers, engineers, quality inspectors and machine operators works day and night to ensure each component satisfies the stringent Valley quality requirements. Because our suppliers are located in the United States, we can easily perform random inspections of their facilities to make sure they are conference our quality standards. All major parts are also machined by Valley, providing another level of quality control. Your final inspection is performed by assessment each gearbox before it really is shipped. 
And, to further ensure Valley quality, randomly selected gearboxes are life-tested inside our gearbox testing laboratory.
But, even the best gear design and materials won’t help if the gearbox isn’t sealed from the components. That’s why Valley uses a patented six-barrier input and nine-barrier result seal to keep oil in and problems out. To compensate for this longer shaft, unique wheels are used that actually move the guts of the tire closer to the gearbox result bearing compared to the industry standard, reducing the load on the gearbox.
Valley also uses U.S.-made, irrigation gearbox case-hardened bearings made from ultra-pure steel rather than through-hardened Chinese bearings used by others. Case-hardening provides superior wear features while maintaining the internal toughness of the primary material. As a result, Valley bearings possess a 40 percent higher load rating.
The Valley gearbox also offers a 52:1 gear ratio. This means the gearbox uses 4 percent much less energy to move the device through the field, but, moreover, the design has a fully recessed tooth action. With a fully recessed style, the gears maintain lubrication oil between your gears longer, reducing friction for increased load capacity and longer life.