ASSY, GPV, 2690

Replacement Gradient Proportioning Valve (GPV) Assembly.The GPV features opening and closing rates and aperture sizes of an exceptionally tight tolerance. The four inlet valves are actuated by solenoids that have precise electrical characteristics to help reduce heat buildup and protect the system from outgassing. The gradient proportioning valve provides exact, reproducible mixing of up to four different solvents. Used in Alliance Separation Modules.