Miniature high pressure difference microflow control valve

The utility model relates to a microflow control valve of minitype for high pressure fluids, comprising a valve body 1, an oil inlet 10, an oil outlet 2, locking screw, and other parts. The contact surface between an upper overflow film 7 (PTFE ) positioned on a pressure strip 6 (steel) in the valve body 1 and a lower overflow film 8 (brass) welded onto the valve body 1 may be made into opposite triangular threads (pitch=0.6-09 mm; depth=0.10-0.3 mm) or a flat surface. The upper middle section of the pressure strip 6 contacts with the convex end at the lower middle section of the valve core 3 that is thread connected with the valve body 1; therefore, during operation, the size of a flat-threaded porthole therein may be adjusted as required by the flow.