FR2444968A1 - Pre-controlled pressure reduction valve - has main control piston with two control edges for connection of low pressure side to pre-control valve and damping arrangement - Google Patents

Pre-controlled pressure reduction valve - has main control piston with two control edges for connection of low pressure side to pre-control valve and damping arrangement

Info

Publication number
FR2444968A1
FR2444968A1 FR7931341A FR7931341A FR2444968A1 FR 2444968 A1 FR2444968 A1 FR 2444968A1 FR 7931341 A FR7931341 A FR 7931341A FR 7931341 A FR7931341 A FR 7931341A FR 2444968 A1 FR2444968 A1 FR 2444968A1
Authority
FR
France
Prior art keywords
control
piston
valve
low pressure
chamber
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
Application number
FR7931341A
Other languages
French (fr)
Other versions
FR2444968B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bosch Rexroth AG
Original Assignee
GL Rexroth GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GL Rexroth GmbH filed Critical GL Rexroth GmbH
Publication of FR2444968A1 publication Critical patent/FR2444968A1/en
Application granted granted Critical
Publication of FR2444968B1 publication Critical patent/FR2444968B1/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2093—Control of fluid pressure characterised by the use of electric means with combination of electric and non-electric auxiliary power
    • G05D16/2097—Control of fluid pressure characterised by the use of electric means with combination of electric and non-electric auxiliary power using pistons within the main valve

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Fluid-Damping Devices (AREA)
  • Control Of Fluid Pressure (AREA)

Abstract

The two-way valve has standardised connection system for high and low pressure, also including the control oil terminal for draining control oil from a pre-control valve, as well as a dampening device for a hollow main control piston (2). The latter has two control edges (2a, 2b), the second one (2b) providing a connection at the main piston stroke of the low pressure side (N) to the control chamber (12) of the main piston. The connection is provided beyond the closing position of the main piston. The control chamber is connected to the valve chamber (24) of the pre-control valve. The dampening device consists of a piston chamber (17), cooperating with a piston (13), the piston chamber being connected outwards by a throttle (15). The piston chamber forming part (2d), or the damping piston, form fixed components of the main control piston. The latter first control edge (2a) cooperates with progressively variable connecting bores (8a) between the high and low pressure sides in such a manner that the opening cross section is progressively reduced with the main piston increasing stroke.
FR7931341A 1978-12-20 1979-12-20 REDUCING TWO-WAY VALVE WITH PILOT VALVE Expired FR2444968B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2855018A DE2855018C2 (en) 1978-12-20 1978-12-20 Pilot operated two-way pressure reducing valve

Publications (2)

Publication Number Publication Date
FR2444968A1 true FR2444968A1 (en) 1980-07-18
FR2444968B1 FR2444968B1 (en) 1985-10-11

Family

ID=6057750

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7931341A Expired FR2444968B1 (en) 1978-12-20 1979-12-20 REDUCING TWO-WAY VALVE WITH PILOT VALVE

Country Status (2)

Country Link
DE (1) DE2855018C2 (en)
FR (1) FR2444968B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995033231A1 (en) * 1994-05-27 1995-12-07 Mannesmann Rexroth Gmbh Precontrolled three-way pressure reduction valve

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1945774A1 (en) * 1968-09-18 1970-03-26 Philips Nv Pressure control valve
DE1948294A1 (en) * 1969-09-24 1971-03-25 Rexroth Gmbh G L Pilot operated pressure reducing valve
DE2413273A1 (en) * 1974-03-20 1975-09-25 Bosch Gmbh Robert PRESSURE REDUCING VALVE
DE2403007A1 (en) * 1974-01-23 1975-10-16 Zahnradfabrik Friedrichshafen Two stage hydraulic relief valve - having main spool which carries spring biased pilot stage to provide damped operation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1193283B (en) * 1958-08-02 1965-05-20 Wilhelm Odendahl Controller with a lift-actuated valve as an actuator
DE1265467B (en) * 1965-04-05 1968-04-04 Pintsch Bamag Ag Pilot operated pressure regulator for high pressure gas

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1945774A1 (en) * 1968-09-18 1970-03-26 Philips Nv Pressure control valve
DE1948294A1 (en) * 1969-09-24 1971-03-25 Rexroth Gmbh G L Pilot operated pressure reducing valve
DE2403007A1 (en) * 1974-01-23 1975-10-16 Zahnradfabrik Friedrichshafen Two stage hydraulic relief valve - having main spool which carries spring biased pilot stage to provide damped operation
DE2413273A1 (en) * 1974-03-20 1975-09-25 Bosch Gmbh Robert PRESSURE REDUCING VALVE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995033231A1 (en) * 1994-05-27 1995-12-07 Mannesmann Rexroth Gmbh Precontrolled three-way pressure reduction valve
US5857479A (en) * 1994-05-27 1999-01-12 Mannesmann Rexroth Ag Precontrolled three-way pressure reduction valve

Also Published As

Publication number Publication date
DE2855018C2 (en) 1983-03-03
FR2444968B1 (en) 1985-10-11
DE2855018A1 (en) 1980-06-26

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Legal Events

Date Code Title Description
CD Change of name or company name
ST Notification of lapse