In this paper, time series bi-spectrum analysis for fault diagnosis of speed-regulating valve is proposed to study a new fault detection method for the hydraulic system.

This paper introduces the structure and principle of the pressure regulating overflow valve and rotation speed regulation valve used in a new type of cleaner.

Off penetrable knife gate valve is a new type of fast-flow regulating valve with both ends opened and closed operation of actuators that can double increase headstock speed.