JPH01176577U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of a flow rate control device according to the present invention, FIG. 2 is a sectional view showing a spool valve used in this embodiment, and FIG. 3 is a sectional view showing a conventional device. be. 21... Valve body, 22... Storage hole, 23
...Drain passage, 24...Introduction passage, 26...Discharge passage, 27...Orifice, 30...Spool valve, 34...Pressure signal passage.

Claims (1)

[Scope of utility model registration request] A storage hole formed in the internal axial direction of the valve body, an introduction passage and a drain passage formed in the radial direction of the circumferential wall of the valve body and communicating through the storage hole, and a drain passage from the introduction passage into the storage hole. A discharge passage that supplies the introduced working fluid to the actuator via an orifice, and a spool valve that is slidably provided in the storage hole and controls opening and closing of the drain passage in response to a differential pressure across the orifice. What is claimed is: 1. A flow rate control device comprising: a pressure signal passage for transmitting a differential pressure across the orifice to the spool valve; the spool valve having a pressure signal passage therein;