Passive dampening gradient proportioning valve

A gradient proportioning valve for liquid chromatography comprising:

• a plurality of inlet ports configured to receive a plurality of fluids;
• a plurality of actuation mechanisms wherein each of the plurality of respective actuation mechanisms is a solenoid valve, wherein each of the plurality of actuation mechanisms includes a passive energy absorbing solenoid armature stop configured to dampen a stop of an armature of the solenoid valve during actuation, wherein the passive energy absorbing solenoid armature stop is made of a compliant material;
• a manifold connected to each of the plurality of inlet ports configured to mix the plurality of fluids in a controlled manner to provide a fluid composition, the manifold including a plurality of fluid conduits internal to the manifold, each of the plurality of fluid conduits receiving fluid through a respective one of the plurality of inlet ports, each of the plurality of fluid conduits operatively communicable to a respective actuation mechanism of the plurality of actuation mechanisms configured to open and close each of the plurality of fluid conduits in a controlled manner;
• a common outlet port configured to receive the fluid composition;
• and
• a single accumulator chamber internal to the manifold, wherein each of the plurality of fluid conduits provides fluid to the single accumulator chamber, wherein the single accumulator chamber includes a diaphragm disposed therein, a first side of the diaphragm exposed to an interior of the single accumulator chamber and a second side of the diaphragm exposed to an exterior of the manifold.