抄録
A high pressure electro-hydraulic 2 port valve of 6mm in diameter and 0.4mm stroke is developed for a cyclic pressure test of diesel fuel pipes. The valve compensates steady-state flow force and reduces leaks from both valve seat and lands as minimum as possible for controlling 200MPa diesel fuel. This paper describes the valve design, test results of flow force compensation and of relation between leak and Hertzian pressure at the valve seat, leak from the clearlance of land. It is applied to the cyclic pressure test of a pipe of 560mm in length and 1.59mm in bore.
