Questions tagged [valves]
The valves tag has no usage guidance.
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Help identifying a source for medical/bioprocess rotational pinch valve
I am attempting to identify a type of pinch valve that I have seen used in a few different bioprocess and medical blood/fluid perfusion systems. The valve appears to be actuated by a stepper/servo ...
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Can the debris found in seawater compromise the sealing of a subsea check valve?
In the event of a subsea check valve opening and debris lodging in the region where sealing takes place, could that make the valve not close when it should?
Would that happen to debris of any size? If ...
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Why isn't my valve controller not providing sufficient amount of voltage to my fan?
We're using the valve controller below to control the speed of a (generic) fan: https://products.axiomatic.com/viewitems/valve-controls/can-to-4-outputs-valve-controller
Problem: We're supplying the ...
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Operating a latching 24V DC valve with non-reversible current direction signal
Most 24V DC latching valves require a reversal of the current flow direction to be able to switch between open/close states. However, is there a way to operate them with a signal that can only go 0V ...
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Normally open check valve
What I'm looking for is basically an always open check valve that closes at a certain pressure. ~5psi.
The application is a breather vent that closes if the valve is submerged in water. Would a biased ...
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What does 12CC refer to when talking about voltage?
Is it 12V with a connector?
For example in the data sheet here: https://www.hydraulicmegastore.com/product/vcf12nc12cc/
Is this related in any way? (A DMP-12CC connector cable)
https://www.monacor.com/...
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What would prevent me from using this valve for water?
https://www.kingstonvalves.com/product/ksv25cr-stainless-steel-asme-soft-seat-safety-valve/
Looking to use this for water instead of air. I haven't seen a good reason not to as the physics of the ...
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Why no lever tools were used during manual valve opening attempts in Fukushima Daiichi?
I watched a PBS documentary https://youtu.be/qRKScRgsUaE and Netflix series about this accident. Both show very slow and strenuous attempts to open a valve manually. Why there was no use of level ...
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Volume multiplying hydraulic pressure reduction unit?
I'm tying to figure out what something is called, assuming it exists at all. If I knew what to search for, I'm reasonably sure I could figure out which part would be suitable for the application, but ...
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How to prevent liquid backflow when pumping an upside-down liquid container with air to pressurize it?
I'm trying to design a system that will have glass bottles upside down filled with liquid. They will be pressurized via a bulkhead air input and will dispense through bulkhead liquid output.
Here is a ...
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Displacement and force control with pneumatic cylinder
Good day,
I was confronted with the task to develop a new controller for pneumatic cylinders. The control channels are displacement and force. A load cell is used to measure the force (analog signal). ...
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How does the hydraulic valve system work in excavators?
There are many types of valves used in excavators. Two are important: the main valve and the pilot valve. Is the pilot valve is controlled by the operator and the main valve is controlled by the pilot ...
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Do 6/3 proportional valves like this exist?
Like a directional valve but used to select either pair of supply and return. Could be done with two regular 5/3 valves, but it would be nice to use only a single valve. Does something like it exist?
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Improving O-Ring/flapper valve injection mold ->non-engineer
I make specialized flapper valves that are similar to O-Rings. The current model uses aluminum sheets as base disks that adhere to the rubber (2 part urethane). The rubber is poured into the waxed ...
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Passive gas mixing valve that takes fixed ratio of gas from two different inputs
I am designing a device that requires a gas (air) valve that takes the same volume of gas from two different input ports IP1 and IP2.
The output port OP will have lower pressure than both of the ...
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