- #1
melmel4546
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how does a 5/3-way proportional directional control valve VPWP work ? and Information about the 5/3-way proportional directional control valve plss. 
5/3-way proportional directional control valve VPWP
- Thread starter melmel4546
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- Control Proportional Valve
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Discussion Overview
The discussion centers on the functioning and details of a 5/3-way proportional directional control valve (VPWP), including its design and application in hydraulic or pneumatic systems. Participants explore various aspects of the valve's operation, including its states, connections, and components.
Discussion Character
- Technical explanation
- Conceptual clarification
- Debate/contested
Main Points Raised
- One participant inquires about the workings of the 5/3-way proportional directional control valve and requests more information.
- Another participant explains that the valve typically has five ports and three states, with proportional flow controlled by solenoid current, suggesting its use in electrically controlled hydraulic systems.
- It is proposed that the valve likely features a proportional cross-over spool design, with solenoids moving the spool to control fluid flow, and that the fifth port may serve a specific function such as signaling or interlocking.
- A participant expresses a desire for information that does not involve solenoids, indicating a preference for a different type of explanation.
- Another participant describes the neutral position of the valve, noting that all paths are blocked and explaining the connections in the valve's end positions.
- Links to external resources are provided by participants to assist with understanding the valve's operation and design.
- A later reply clarifies that the valve referenced in an earlier post is not a simple directional control valve but an integrated pneumatic product with additional features like control solenoids and sensors.
Areas of Agreement / Disagreement
Participants express differing levels of understanding and interest in the valve's operation, with some seeking technical details while others prefer a more straightforward explanation. There is no consensus on the specific type of valve being discussed or its components.
Contextual Notes
Some participants indicate uncertainty regarding the diagrams associated with the valve, and there are requests for more article-style explanations rather than technical specifications. The discussion reflects varying levels of familiarity with hydraulic and pneumatic systems.
- #2
Baluncore
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Welcome to PF.
It will depend on who makes it. 5/3 suggests 5 ports, with three states, with proportional flow decided by solenoid current. Maybe for use in an electrically controlled, hydraulically operated, servo system.
Do you understand how normal Directional Control spool Valves operate ?
https://en.wikipedia.org/wiki/Directional_control_valve
It would probably be a proportional cross-over spool valve with a solenoid at each end, spring loaded to rest in the centre = neutral position. Each solenoid would move the spool in a different direction. As solenoid current is increased the valve moves further and allows more fluid to flow through the valve. The 5 ports suggests it has the normal Pump and Tank ports, P&T, plus the DCV extend and retract ports, A&B. The fifth may be a signalling, brake or interlock line.
Can you please give a link to the particular hydraulic valve you are referring to, and explain your intended application.
It will depend on who makes it. 5/3 suggests 5 ports, with three states, with proportional flow decided by solenoid current. Maybe for use in an electrically controlled, hydraulically operated, servo system.
Do you understand how normal Directional Control spool Valves operate ?
https://en.wikipedia.org/wiki/Directional_control_valve
It would probably be a proportional cross-over spool valve with a solenoid at each end, spring loaded to rest in the centre = neutral position. Each solenoid would move the spool in a different direction. As solenoid current is increased the valve moves further and allows more fluid to flow through the valve. The 5 ports suggests it has the normal Pump and Tank ports, P&T, plus the DCV extend and retract ports, A&B. The fifth may be a signalling, brake or interlock line.
Can you please give a link to the particular hydraulic valve you are referring to, and explain your intended application.
- #3
melmel4546
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Last edited:
- #4
Baluncore
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Do you understand the diagrams ?
- #5
melmel4546
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not so much , I'm looking for something article-style
- #6
Baluncore
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When in neutral middle position all paths are blocked.
The ports 1, 2, 3, 4, & 5 are connected differently in the two end positions.
Imagine sliding the middle of the diagram sideways.
These are the three connection states.
The ports 1, 2, 3, 4, & 5 are connected differently in the two end positions.
Imagine sliding the middle of the diagram sideways.
These are the three connection states.
- #7
Baluncore
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- #8
Baluncore
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The device you show in post #3 is not a simple DCV. It is an integrated pneumatic product manufactured by Festo. It includes control solenoids, LED indicators and pressure sensors. The full data sheet is here;
https://www.festo.com/cat/en-us_us/data/doc_ENUS/PDF/US/VPWP_ENUS.PDF
You must ask more specific questions.
https://www.festo.com/cat/en-us_us/data/doc_ENUS/PDF/US/VPWP_ENUS.PDF
You must ask more specific questions.
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