JPS563357A - Pilot operated type relief valve - Google Patents
Pilot operated type relief valveInfo
- Publication number
- JPS563357A JPS563357A JP7657479A JP7657479A JPS563357A JP S563357 A JPS563357 A JP S563357A JP 7657479 A JP7657479 A JP 7657479A JP 7657479 A JP7657479 A JP 7657479A JP S563357 A JPS563357 A JP S563357A
- Authority
- JP
- Japan
- Prior art keywords
- flow
- space
- pilot
- throttle
- relief valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Safety Valves (AREA)
Abstract
PURPOSE: To provide a highly responsive relief valve operated by a pilot, wherein between an inlet and a pilot relief valve is arranged a throttle valve having a space which will be varied in response to the pilot flow rate to transmit the generated pressure difference to upper and lower portions of a main piston.
CONSTITUTION: When the pressure difference of a flow inlet 5 exceeds a predetermined value of a pilot relief valve 10, a poppet 9 is opened, and a pilot flow will flow will flow from the flow inlet 5 through a space 27 between a circumferential groove 20 and a throttle land 15a, a throttle 25, and poppet 9 and a center of a spring 9 to a flow outlet 6. The pressure difference generated between the front and rear of the throttle 25 is transmitted to chambers 17, 18, while a spool 25 is then pushed to the right to throttle the space 27, and the pressure in the chamber 12 is lowered so that a main piston is elevated to open a space 14 directly communicating the flow inlet 5 with the flow outlet 6. When the inflow pressure increases sharply, the space 27 will be further throttle by the spool 15 to open the space 14 highly responsively, and when the inflow pressured decreases sharply, the reversed action will be promptly taken place. Thus a highly responsive relief valve which will be operated by a pilot is provided.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7657479A JPS563357A (en) | 1979-06-18 | 1979-06-18 | Pilot operated type relief valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7657479A JPS563357A (en) | 1979-06-18 | 1979-06-18 | Pilot operated type relief valve |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS563357A true JPS563357A (en) | 1981-01-14 |
JPS6145106B2 JPS6145106B2 (en) | 1986-10-06 |
Family
ID=13609009
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7657479A Granted JPS563357A (en) | 1979-06-18 | 1979-06-18 | Pilot operated type relief valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS563357A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4500680A (en) * | 1983-11-14 | 1985-02-19 | Ppg Industries, Inc. | Aromatic acid catalysts providing improved humidity resistance |
US4501854A (en) * | 1983-11-14 | 1985-02-26 | Ppg Industries, Inc. | Aminoplast curable compositions containing disulfonic acid esters as latent acid catalysts |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0651359U (en) * | 1992-12-21 | 1994-07-12 | ナショナルベニヤ株式会社 | Veneer for stairs |
-
1979
- 1979-06-18 JP JP7657479A patent/JPS563357A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4500680A (en) * | 1983-11-14 | 1985-02-19 | Ppg Industries, Inc. | Aromatic acid catalysts providing improved humidity resistance |
US4501854A (en) * | 1983-11-14 | 1985-02-26 | Ppg Industries, Inc. | Aminoplast curable compositions containing disulfonic acid esters as latent acid catalysts |
Also Published As
Publication number | Publication date |
---|---|
JPS6145106B2 (en) | 1986-10-06 |
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