ES434051A1 - Pilot-controlled pressure relief valves - Google Patents

Pilot-controlled pressure relief valves

Info

Publication number
ES434051A1
ES434051A1 ES434051A ES434051A ES434051A1 ES 434051 A1 ES434051 A1 ES 434051A1 ES 434051 A ES434051 A ES 434051A ES 434051 A ES434051 A ES 434051A ES 434051 A1 ES434051 A1 ES 434051A1
Authority
ES
Spain
Prior art keywords
piston
recoil
connection
stepped
communicates
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.)
Expired
Application number
ES434051A
Other languages
Spanish (es)
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.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
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
Priority claimed from DE19742403007 external-priority patent/DE2403007C2/en
Priority claimed from DE2500537A external-priority patent/DE2500537C2/en
Priority claimed from DE2500480A external-priority patent/DE2500480C2/en
Application filed by ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of ES434051A1 publication Critical patent/ES434051A1/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/10—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve
    • F16K17/105—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve using choking or throttling means to control the fluid operation of the main valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/38—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side
    • F16K31/383—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side the fluid acting on a piston
    • F16K31/3835—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side the fluid acting on a piston the discharge being effected through the piston and being blockable by a mechanically-actuated member making contact with the piston

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)

Abstract

Improvements introduced in pressure-limiting valves with prior control, characterized by comprising a constructive arrangement consisting of a piston, which acts as a pressure balance, located inside a body casing with the possibility of axial longitudinal displacement in it, which it is provided with an inlet connection and a recoil connection that communicates with the front part of the piston, there being as a retention and recovery element a compression spring that constantly opposes the recoil of a stepped pre-control valve accompanied by a second stepped piston with a throttle bore that communicates the inlet with the spring chamber, which predetermines that both the front surfaces of the valve piston and the two front surfaces of the step piston are under the same pressure, along with the differential surface, you run laying on the front faces of said stepped piston, it is in connection with the recoil through a transverse bore provided in the valve piston itself. (Machine-translation by Google Translate, not legally binding)
ES434051A 1974-01-23 1975-01-22 Pilot-controlled pressure relief valves Expired ES434051A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19742403007 DE2403007C2 (en) 1974-01-23 1974-01-23 Pilot operated pressure relief valve
DE2500537A DE2500537C2 (en) 1975-01-08 1975-01-08 Pilot operated pressure relief valve
DE2500480A DE2500480C2 (en) 1975-01-08 1975-01-08 Pilot operated pressure relief valve

Publications (1)

Publication Number Publication Date
ES434051A1 true ES434051A1 (en) 1977-02-16

Family

ID=27185737

Family Applications (1)

Application Number Title Priority Date Filing Date
ES434051A Expired ES434051A1 (en) 1974-01-23 1975-01-22 Pilot-controlled pressure relief valves

Country Status (10)

Country Link
JP (1) JPS5920911B2 (en)
BG (1) BG29576A3 (en)
DK (1) DK155548C (en)
ES (1) ES434051A1 (en)
FR (1) FR2258579B1 (en)
GB (1) GB1466022A (en)
IT (1) IT1026433B (en)
PL (1) PL108692B1 (en)
RO (1) RO64385A (en)
SE (1) SE406800B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0750612Y2 (en) * 1989-03-16 1995-11-15 株式会社小松製作所 Pressure control valve
US7137406B2 (en) 2002-11-19 2006-11-21 Hydraforce, Inc. Self-cleaning filter
CN108488395B (en) * 2018-05-30 2024-04-02 中国重型机械研究院股份公司 Stepped flow type injection valve controlled by multistage pressure

Also Published As

Publication number Publication date
DK18175A (en) 1975-10-27
DK155548C (en) 1989-09-11
BG29576A3 (en) 1980-12-12
IT1026433B (en) 1978-09-20
RO64385A (en) 1979-07-15
PL108692B1 (en) 1980-04-30
JPS50124221A (en) 1975-09-30
SE7500585L (en) 1975-08-20
JPS5920911B2 (en) 1984-05-16
FR2258579B1 (en) 1982-02-19
FR2258579A1 (en) 1975-08-18
DK155548B (en) 1989-04-17
GB1466022A (en) 1977-03-02
SE406800B (en) 1979-02-26

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19970619