| 摘要 |
PURPOSE:To facilitate assembly by fitting the free length of the bias spring of a disk type high pressure valve which can be opened securely and rapidly, in a valve cylinder, and preventing its end part from projecting out of the end face of a cylinder plate. CONSTITUTION:A disk type high pressure valve 77 which can close a high pressure side inlet port 72 and a high pressure side outlet port 74 simultaneously on one end face while which can close a low pressure side port 76 on the other end face, is provided in a valve cylinder 75. Thereby, it is not necessary to reduce a clearance between a ball valve and a valve cylinder 75 on which the high pressure valve 77 slides as in the conventional case, carrying out the pressure drop of a low pressure side port 76 which becomes a driving force for opening the high pressure valve 77 securely and in a very short time. Accordingly, a stable valve opening operation can be obtained and, further, machining a assembling accuracy can be improved. Also, when the free length of the bias spring 78 of the high pressure valve 77 is fitted in the valve cylinder 75, since the end part of the free length is arranged not to project out of the end face of a cylinder plate 57, the valve 77 will not get in the way of assembling, thereby, facilitating the assembly.
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