Ross Valve Manufacturing Co., Troy, NY, has acquired Troy Die Cutting Co., Troy, NY. Ross Valve hopes the deal will trim costs and spur new product development, according to the Albany, NY, Business Review.   ; Ross Valve, which designs, manufactures and services automatic control valves, anticipates making more acquisitions. The company is a fifth-generation family-run business.   ; Troy Die Cutting is a specialized supplier of turn arrows, lane markings and other decals for streets.