Systematrix Engg. Services manufactures LUBRISYS Change over valves (also known as pressure reversing Valve). These valves are used in dual line systems to change from one line to another line when the preset adjusted pressure is achieved and lubrication to the earlier line is completed. Upon reaching the desired pressure in line II the lubricant is again given to line. This continues in sequence & lubrication is achieved to all points of the system automatically with only one pressure line from the pump. While changing the grease or oil goes through the tank line, hence this valve can also be used to operate a cylinder back & forth automatically. The Reversing Valve/ Change over Valve is made compact and can fit at any position