| 摘要 |
A substantially constant flow regulating valve includes a piston dividing a bore into two chambers. The piston is spring biased toward the top chamber of the bore. Fluid from the inlet enters the top chamber through a reference pressure passage and exerts a downward force on the piston. Fluid from the inlet also passes through a low torque inlet flow throttle and into the bottom chamber of the bore where it exerts an upward force on the piston in concert with the spring force. The piston includes an end which variably interacts with an orifice in the lower chamber to maintain a constant pressure differential between the top and bottom chambers. A coil-type piping system, a diversifying campus-type piping system and a pressure source piping system all include the above described flow regulating valve. None of these systems require balancing valves or differential pressure valves when the flow regulating valve is employed.
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