Method and apparatus for pressurizing fluids

A high-pressure valve assembly comprising:

• a valve body, an inner wall of said valve body at least partially forming a valve cavity, isolation means for at least partially dividing said valve cavity into a power chamber and a discharge chamber, said valve body having an inlet in communication with said power chamber and an outlet in communication with said discharge chamber, said valve body having a plurality of valve ports;
• a valve rotor rotatably mounted within said valve cavity, rotation means for rotating said valve rotor with respect to said valve body;
• in a working position of said valve rotor said power chamber communicating with said inlet and a first valve port of said valve ports and said discharge chamber communicating with said outlet and a second valve port of said valve ports;
• said isolation means comprising a valve rod cage mounted within said valve cavity, said valve rod cage having a plurality of valve rod holes, a plurality of elongated valve rods, each said valve rod slidably mounted within a corresponding said valve rod hole, each of said valve rods having a rod cutout area, said valve rod cage forming said power chamber as an annular power cutout area in communication with at least two of said valve rod holes, said valve rod cage forming said discharge chamber as an annular discharge cutout area in communication with at least two of said valve rod holes, said valve rod cage forming said valve ports which correspond to and communicate with said valve rod holes;
• oscillation means for oscillating said valve rods in an axial direction within said valve rod holes so that during an oscillation cycle at least a first one of said valve rods is positioned to form communication between said power cutout area and said rod cutout area of said first one and simultaneously prevent communication between said discharge cutout area and said rod cutout area of said first one and at least a second one of said valve rods is positioned to form communication between said discharge cutout area and said rod cutout area of said second one and simultaneously prevent communication between said power cutout area and said rod cutout area of said second one, said valve rotor having a slanted face, and bias means for urging a round end of each of said valve rods against said slanted face;
• and
• a power cylinder body sealably secured with respect to said valve body, said power cylinder body having a plurality of power chambers in a number corresponding to said valve ports, a power piston slidably mounted within each said power chamber, and said power chambers in communication with corresponding said valve ports.