| 摘要 |
<p>PURPOSE:To contract space, and reduce the number of parts by pressing a valve body installed between a liquid inlet and an excessive liquid port by a pair of cylinder bodies having a cylinder body inside, and opening and closing the valve by adjusting the air pressure in an air chamber, and absorbing pulsation. CONSTITUTION:A valve chamber 22 communicates to an inlet 20 in the lower part and an excessive liquid port on the side part and has a valve seat 26. A piston (valve body) 26 is arranged, and an inner cylinder 46 and an outer cylinder 44 are installed in the upper part of the piston 36. An air chamber 54 is formed by the outer and inner cylinders, and sealed by an oil seal 52. In the upper part of the outer cylinder 44, a compression coil spring (energizing member) 76 and an adjusting screw (operating member) 78 are installed. The air chamber 54 is boosted by the compression coil spring 76, and the piston 36 is pressed to the valve seat 26. The communication opening valve pressure between the inlet 20 and the excessive liquid port is determined by the adjusted pressure value. The urging force of the coil spring is adjusted by an adjusting screw 78. Accordingly, a pressure adjusting device 10 is provided with the pulsation pressure absorbing function, and the space is contracted, and the number of parts is reduced.</p> |
