Spool type flow control valve and manufacturing method thereof
AssigneeSumitomo Heavy Industries, Ltd.
InventorsTatsuya Yoshida, Daisuke Shinohira
Life of this patent
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Abstract
There is provided a spool type flow control valve including a sleeve in which a supply port, a control port, and an exhaust port are formed, and a spool accommodated to be movable in an axial direction inside the sleeve and including a valve body. The valve body controls an opening area of the control port so that a flow rate is controlled. A difference between a maximum value and a minimum value of an internal leakage amount which is a flow rate at which a gas supplied from the supply port is discharged from the exhaust port in a state where the control port is shut off is equal to or smaller than a predetermined threshold.
Claims7
A spool type flow control valve comprising:
- a sleeve in which a supply port, a control port, and an exhaust port are formed;
- and
- a spool accommodated to be movable in an axial direction inside the sleeve and including a valve body,
- wherein the valve body controls an opening area of the control port so that a flow rate is controlled, and
- a difference between a maximum value and a minimum value of an internal leakage amount which is a flow rate at which a gas supplied from the supply port is discharged from the exhaust port in a state where the control port is shut off is equal to or smaller than a predetermined threshold.
A spool type flow control valve comprising:
- a sleeve in which a supply port, a control port, and an exhaust port are formed;
- and
- a spool accommodated to be movable in an axial direction inside the sleeve and including a valve body,
- wherein the valve body controls an opening area of the control port so that a flow rate is controlled, and
- at least one of the sleeve and the spool is formed to have a dimension based on an internal leakage amount which is a flow rate at which a gas supplied from the supply port is discharged from the exhaust port in a state where the control port is shut off.
A manufacturing method of a spool type flow control valve including a sleeve in which a supply port, a control port, and an exhaust port are formed, and a spool accommodated to be movable in an axial direction inside the sleeve and including a valve body, the valve body controlling an opening area of the control port so that a flow rate is controlled, the method comprising:
- processing at least one of the sleeve and the spool to have a dimension based on an internal leakage amount which is a flow rate at which a gas supplied from the supply port is discharged from the exhaust port in a state where the control port is shut off.
A manufacturing method of a spool type flow control valve including a sleeve in which a supply port, a control port, and an exhaust port are formed, and a spool accommodated to be movable in an axial direction inside the sleeve and including a valve body, the valve body controlling an opening area of the control port so that a flow rate is controlled, the method comprising:
- inspecting whether or not a difference between a maximum value and a minimum value of an internal leakage amount which is a flow rate at which a gas supplied from the supply port is discharged from the exhaust port in a state where the control port is shut off is equal to or smaller than a predetermined threshold.
Dependencies are inferred from the claim text.