| 摘要 |
The invention herein involves a pilot-controlled piston-operated valve, where the piston is reciprocably received in a cylindrical chamber. The inlet to the valve is separated from the outlet by a partition having an opening, and the piston has an extension extending into the opening. The piston has a piston ring, which is split at an angle of approximately 15 DEG which acts as a bypass opening from inlet to the space above the piston whereby fluid can flow from the inlet through the split in the piston ring by capillary action to the space above the piston, and when the pilot closes the pilot orifice in the piston, the pressure of this fluid will force the pilot piston to closed position. When the piston is in open position, the liquid will flow directly from the inlet through the opening in the partition.
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