| 摘要 |
A smoothly acting adjustable fluid flow check valve comprises an adjustably spring biased ball valve member, a piston upstream of the ball valve member and having a stem acting as an actuator for the ball valve member and as a further valving member actually controlling the volume of fluid passing through the check valve, the piston and ball valve member moving under the influence of a dashpot disposed so as to damp their movement. The valve may be incorporated into a conventional faucet structure.
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