Topic: Hydraulic Directional Control Valves
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Answers to Common Questions
What causes chatter in directional control hydraulic valves?
Hi John Without details on your valve geometry and flow conditions, I can't be sure of what is happening. Here is a possibility. As the flow enters the small opening it accelerates and the pressure drops, but as it exits it sees an abrupt... Read More »
Source: http://en.allexperts.com/q/Aeronautical-Engineering-1809/Directio...
What Is a Directional Control Valve?
Directional control valves control the flow of a fluid by moving actuators into different positions. Directional control valves use either mechanical operation, pilot actuation or electronic valve operation. Does this Spark an idea? Read More »
Source: http://www.ehow.com/facts_7673298_directional-control-valve.html
What is a 4 way hydraulic control valve?
The number is four ways in and out of oil. Way valves in the hydraulic system with a number of ways in and out of the way oil and positioning are introduced. For example, two-position four-way valve. Read More »
Source: http://wiki.answers.com/Q/What_is_a_4_way_hydraulic_control_valve
More Common Questions
Answers to Other Common Questions
As a direct relief valve opens, its spool or poppet pushes against a spring. As the spring compresses, the system pressure necessarily rises due to the spring constant. To handle large flows, you need a big valve. To minimize the pressure r...
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Source: http://wiki.answers.com/Q/Why_are_direct_acting_relief_valves_not...
Electronically adjusted orifices with pressure compensation. Proportional flow control valves have an integrated compressor or hydrostatic that limits the pressure differential across the throttling orifice. This keeps the flow, or actuator...
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Source: http://answers.yahoo.com/question/index?qid=20091117021247AA9Q6Iy
Most flow control valves work on the principle that the orfice is restricted and a spring loaded relief valve lets the excess flow return to tank. The orfice restricting the flow can be opened to the amount of flow desired.
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Source: http://www.webanswers.com/science/how-does-work-hydraulic-flow-co...
Ones I've seem most often are Asco Joucomatic. They're fast and reliable.
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Source: http://answers.yahoo.com/question/index?qid=20100310040839AAwXucG
They are called Safety Relief Valves.
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Source: http://answers.yahoo.com/question/index?qid=20100302181530AAgallS
OEM of Conn. (that is their name).
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Source: http://answers.yahoo.com/question/index?qid=20060713060501AAGlbqH
Reverser valve http://www.masoneilan.com/internet/busin…
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Source: http://answers.yahoo.com/question/index?qid=20090819222341AAozTvq
