| 摘要 |
A differential pressure regulator is provided having a single piece pressure balanced flow spindle. The differential pressure regulator also includes a spring biased diaphragm assembly which acts against the pressure balanced flow spindle which is spring biased to the closed position. The upper surface of the diaphragm assembly is exposed to the signal pressure, and the lower surface of the diaphragm assembly is exposed to the outlet pressure. An adjustable spring is situated above the upper diaphragm to provide an additional or additive downward force on the upper diaphragm necessitating a greater force on the outlet side to close the valve. A vent is provided through the central bolt and spacer rings. The upper end of the flow spindle blocks the vent in the central bolt so long as the signal pressure plus the spring pressure is greater than or equal the outlet pressure.
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