Profile: Rainey Engineering is a stocking representative and sales of specialty pumps & valves. We market petrochemical products. We use pulp & paper, power, and industrial market needs. We maintain an inventory of the manufacturer's products & we also have the capabilities of valve automation, pump packaging and field service. Tricentric provides an eccentricity of the disc shaft to the body seat allows the disc to move without interference into and off of the seat thus eliminating friction and wear.