Description: Gate valves, namely, valves for hydraulic fracturing in oil or gas operations; gate valves, namely, high-pressure valves for use in oil or gas well hydraulic fracturing operations; parts of oilfield wellhead machines, namely, gate valves; valves used in oil and gas completion and post-completion operations; valves as machine parts used in frac stacks, namely, a compilation of valves and components that replace the production wellhead during pressure pumping operations; structural and replacements parts for all of the foregoing, namely, packing seals, o-rings, packing glands, packing driver bearings, bonnet seal rings, flange seal rings, bushings, gate seats, operating and balance stems, bodies and bonnets; repair, servicing and maintenance of valves for hydraulic fracturing in oil or gas operations and high-pressure valves for use in oil or gas well hydraulic fracturing operations
