Finally, we also control the quality of each component and each part of the manufacturing process. A dedicated team of purchasers, engineers, quality inspectors and machine operators works night and day to make sure each component meets the irrigation gearbox stringent Valley quality requirements. Because our suppliers are situated in america, we can certainly perform random inspections of their services to make sure they are conference our quality requirements. All major elements are also machined by Valley, providing a second quality level control. A final inspection is conducted by screening each gearbox before it is shipped. And, to further assure 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 insight and nine-barrier output seal to keep oil in and problems out. To compensate for this longer shaft, particular wheels are used that truly move the guts of the tire closer to the gearbox output bearing compared to the industry standard, reducing the load on the gearbox.
Valley also uses U.S.-made, case-hardened bearings created from ultra-pure steel rather than through-hardened Chinese bearings utilized by others. Case-hardening provides excellent wear features while maintaining the inner toughness of the core material. Consequently, Valley bearings have a 40 percent higher load rating.
The Valley gearbox also has 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 includes a fully recessed tooth action. With a completely recessed style, the gears keep lubrication oil between the gears longer, reducing friction for increased load capability and longer life.