Questions tagged [pneumatic]
The pneumatic tag has no usage guidance.
53
questions
2
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1answer
34 views
Circuit to provide position control for double action hydraulic actuator
I was wondering how to construct a hydraulic circuit to control a hydraulic double acting piston/actuator enabling the electronic control of the piston extension. I have found the following pneumatic ...
1
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1answer
22 views
Can air flow occur in both directions in a 2 way solenoid valve?
I'm designing a system where I need to fill and exhaust air from an an air bag. The air will be supplied from a dc motor. As of right now I've been considering placing a 2 way solenoid valve for air ...
0
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2answers
45 views
How do I connect multiple water-filled syringes?
I'm trying to connect 4 separate syringes containing water and we need water-tight tubing to prevent water from leaking out of the system. The water would theoretically need to be pushed out of one ...
1
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0answers
32 views
Using Density Correction Factors for Fans and Blowers
I've been researching fans/blowers and their use in pneumatic systems (particularly conveying systems), and I'm confused by the application of density correction factors. Let me describe a sample ...
-1
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3answers
96 views
How do I limit the pressure of a tank to a fixed PSI?
I previously asked about the safety of connecting my 150 PSI air compressor to my auxiliary 120 PSI tank. I was warned of possible compromise of the tank which can lead to injuries and even death. It ...
-1
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3answers
266 views
Is it safe to use a 125PSI rated auxiliary air tank with a 150PSI air compressor?
I have a small, 5 gallon, pancake compressor which has a maximum 150PSI rating. Unfortunately, it doesn't have the air capacity to power the demands of an HVLP paint sprayer or a die grinder without ...
0
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1answer
19 views
How do I increase negative air pressure without inhibiting airflow?
I would like to increase the vacuum power of my desoldering station. It’s a multifunction unit that includes a single vacuum pickup tool, hot air wand and desoldering gun. When using the desoldering ...
1
vote
2answers
31 views
What is this pneumatic connector called?
I'm looking into fitting ball-type inflatable equipment (eg bike tires, yoga balls, basketball ball, etc) to a 2/4 silicone tube. This will be to measure the pressure inside the inflatable, so the ...
0
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3answers
50 views
How does 3 “liars” in Strandbeests work?
See video:
https://www.youtube.com/watch?v=75Z7-gmd_qk&t=226
This does not make sense to me. As far as I got it, bottom pipe is isolated from top 2 and just controls valve of the top 2 pipes. So, ...
1
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0answers
12 views
How to repair stripped, leaky pneumatic fitting?
I have a pneumatic cylinder with a stripped fitting, which causes a slow leak. I took it to a machine shop and he tried to re-thread it but there wasn't enough good metal left to get a good thread. He ...
1
vote
1answer
20 views
Linear pneumatic actuator opening time - pressurise connection pipe
I would like to estimate the time needed to open a linear single-acting pneumatic actuator.
The actuator's piston is loaded with a spring pushing downwards and the operating fluid (air or nitrogen) ...
0
votes
2answers
22 views
How to achieve pulsation damping in pneumatic rather than hydraulic system?
My background is in electrical engineering so I am something of a novice when it comes to pneumatic systems, but I have been tasked with designing a sampling system that draws an extremely low flow at ...
1
vote
2answers
15 views
Regulating pressure down inside vessel as it increases
I want to keep the pressure inside a balloon (effectively - a rubber vessel) constant, as the balloon is compressed. I'm wondering if a regulator like this (wiki page here showing mechanism - I ...
3
votes
2answers
640 views
What is the equivalent of a capacitor in pneumatics?
I am building a desoldering gun. While the pump I am using provides decent suction, I would like a quick powerful vacuum burst to prevent the solder from solidifying in the nozzle rather than in the ...
1
vote
2answers
35 views
Need to route air, like a solenoid does, but with many output directions
There might be a proper term for what I'm looking for, but forgive me, I'm not a professional engineer. I have a small cylinder with compressed air that connects using push-to-connect's (like these). ...
2
votes
1answer
40 views
Can I submerge a pneumatic cylinder in oil?
I am looking for a linear pneumatic cylinder to raise and lower a fixed object. Everything will be submerged in oil (for electrical purposes). I am new to engineering and pneumatics in particular, and ...
0
votes
1answer
22 views
Emulate impact forces using pneumatic piston
I am trying to test a piece of furniture based on a particular code, the code states that i can either drop a bag (with a specific shape) of 57 kg 1.2 in above the seat or I can use other methods as ...
0
votes
1answer
16 views
How to ensure uniaxal and uniform force application on uneven samples using pressurized fluids
I am trying to apply a compression force to samples using air. I do not want to directly apply my loading since my samples are irregular. I do not wish to process them with a flattening step. I hope ...
1
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2answers
81 views
Designing a pneumatic system for consistent pressure/flow
Fellow engineers, I need your help in improving my design for a pneumatic system for maintaining a constant supply of at least 90 PSI and 20 CFM for a particle analyzer with stringent air requirements....
0
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2answers
37 views
Ideas needed: how to tilt a panel side to side [closed]
requirements:
a panel of wood 4 ft long by 2 ft wide laying flat
this panel should be able to tilt side to side (2 way)
the weight on the panel will be about 250 lbs up to 400 lbs.
controlled lift of ...
1
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0answers
18 views
Is this Proportional Electro-pneumatic valve a direct replacement for other valves listed?
In the midst of trying to redesign the pneumatic subsystem of a combined system, I'm at the point of validating a new valve would serve as a direct replacement. The reason for the redesign is an ...
6
votes
1answer
349 views
I want to understand this pneumatic circuit
I have trouble understanding the following pneumatic circuit diagram:
I am new to reading circuit diagrams and i am unfamiliar with some of the symbols. I would appreciate if somebody could explain ...
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0answers
38 views
Choosing a blower for a Pneumatic Conveyor
Basically we are designing a pneumatic conveyor system for transferring 11 tons of beans per hour.
We need to decide on the specifications of the blower. What are the calculations necessary to decide ...
1
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1answer
227 views
Pneumatic cylinder: Pressure rating
I want to create a Pneumatic cylinder, The purpose is, Inside it will will contain a Nylon piston, and one end will be filled with clay. Cylinder will be closed from either side using end caps, which ...
1
vote
1answer
67 views
How do I connect pneumatic components with metal tubing?
I'm building a small pneumatic control cabinet with a couple filters, regulators, valves, and flow restrictors. I had started by using 8 mm push-to-connect fittings and nylon tube, but it seems I can ...
1
vote
1answer
105 views
What is the “quick bleeder valve” in this tool changer pneumatic schematic (and other questions)?
I'm building a CNC router around a HSD ES330 spindle motor that has pneumatic tool-changing ability. The manual recommends the following pneumatic circuit:
I'm not sure I understand the purpose of ...
1
vote
1answer
44 views
Why were pneumatic thermostats commonly installed in buildings?
According to Wikipedia, pneumatic thermostats were invented after electric thermostats.
Yet this article claims that "at least 25 percent of U.S. commercial buildings are served by pneumatic controls,...
1
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1answer
27 views
Best balance of electrical and pneumatic control lines in CNC router table?
I'm building a 4' x 8' gantry-style CNC router table. The spindle motor uses pneumatics to power its draw bar (for automatic tool changes). There are three separate pneumatic supply lines that go to ...
1
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2answers
2k views
What's the difference between a vacuum regulator and pressure regulator?
When browsing through pneumatic parts, I notice that some vendors specify different components for pressure regulator and vacuum regulators. SMC for example does this.
I'm curious why vendors would ...
0
votes
2answers
354 views
Is it standard practice to use a pressure relief valve as a pressure regulator?
I'm attempting to understand the difference between a pressure relief valve and a pressure regulating valve. From my research far, I've come to the following conclusion:
Pressure relief valves are ...
1
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1answer
2k views
How do you interpret a pneumatic regulator symbol?
I'm an EE trying to interpret a pneumatic schematic and have a few questions regarding the symbols being used.
I've come across two different regulator symbols (or so I believe them to be regulator ...
0
votes
1answer
69 views
How to maintain a static negative pressure in a valve?
My target is to create a valve with multiple inlet capillaries. And my output is a pipe of a larger diameter. I do not want to use any electrical systems, and at the same time, I want to maintain ...
1
vote
1answer
217 views
What type of pneumatic valves would represent the valves in the schematic?
What type of pneumatic solenoid valves would represent the valves in the schematic?
Specifically, the lower valves could be represented by a 5 port 4 way 2 position valve. This is because there is ...
2
votes
1answer
48 views
Pneumatic actuator capable to achieve 5m/s?
Is there a pneumatic actuator capable to achieve 5m/s and will be good idea for constant work? I know SMC have up to 3m/s, but I can't find faster.
2
votes
1answer
111 views
How to connect a pneumatic cylinder to a door?
I have this pneumatic cylinder that I wish to connect to a wooden door in order to make it kinda like a Star wars door. I'm wondering what the best way to connect the cylinder to the door would be.
...
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2answers
55 views
Cylinder Reconditioning [closed]
When reconditioning of a pneumatic cylinder, which fit between piston and cylinder is required? and how much tolerance between mating parts is required?. Will surface finish inside of cylinder play a ...
2
votes
2answers
789 views
Lpg cylinder to compressed air tank
I am building a small robot having pneumatic system. I am using 12v car tyre inflator as my compressor.But i didn't find any 3ltr to 6ltr standardrd air tank. Can i convert my old 3ltr lpg tank into ...
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0answers
26 views
Air demand for powder fluidization system
I need a good estimate of the air demand for a system to fluidizde a powder. We a have silo with a 60° cone and a rotary cell feeder attached to the opening in the cone. The powder (fine powdered ...
1
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1answer
496 views
How can I connect a silicon hose with 2mm inner diameter to a smaller 1,9mm port
The biggest diameter of my pressure sensor input port has a size of 1.93 mm. The silicon hose which I want to connect with the sensor's port has an inner diameter size of 2.0 mm.
My honeywell ...
0
votes
1answer
4k views
How to uninstall SIMATIC STEP 7-Micro/WIN V4.0.8.06?
I recently installed SIMATIC STEP 7-Micro/WIN V4.0.8.06 but cancelled the installation after some steps.
But the program appears in the control panel and when I try to uninstall it, the error:- "Did ...
1
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1answer
552 views
Calculating piston force for pneumatic vs hydraulic
I'm trying to calculate piston force pressures for double acting pistons for pneumatic and hydraulic pressures. I found the following formula for calculating both
$$\text{Force} = \frac{\text{...
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0answers
28 views
Proper way to power/use a vacuum cylinder?
I'm considering using a vacuum cylinder in my project (like these ones) to lift sheets of cardboard, but being new to mechanical engineering I'm not at all sure what I need to attach to operate one, ...
1
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1answer
72 views
Hydraulic Arm - Handbrake
I am researching a system that appears to have a hydraulic arm with some kind of "handbrake" as pictured below:
System Description:
Table that can raise and lock into place
Locking mechanism ...
0
votes
1answer
67 views
Rotary Screw Air Compressor
I have a 50 HP screw compressor that has just began to load and unload within 10 seconds when previously would take between 40 and 60 seconds. Nothing has been added or removed from the system. Any ...
1
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1answer
81 views
What material properties matter when selecting a material to withstand a specific pressure (as a sealed tank)?
I want to design a tank to hold liquid propane. The proposed tank would have one inlet valve, one output valve, and no sharp edges. I've read that the pressure required to maintain propane in a liquid ...
1
vote
2answers
96 views
Air flowrate required for testing a pneumatic cylinder?
First time designing with pneumatics here. I want to build a continuous use device (with ~30 back and forth actuation per minute) but do not currently have access to a large compressor.
Is there a ...
2
votes
2answers
132 views
Rules of thumb for sizing an air pump piston?
I am working on a design for a small air pump that uses a single piston.
When choosing a piston I have two parameters diameter and stroke. So, I can make it fatter and shorter, or skinnier and longer,...
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1answer
65 views
pneumatic solenoid operation?
Any idea on how this type of pneumatic solenoid works? I know that NC is normally closed, NO normally open, but not sure how air flows? Thanks!
2
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1answer
2k views
How strict is the direction of air flow in a single direction pneumatic solenoid valve?
I am currently designing a small pneumatic system that pumps air into an airbag, holds the air in, then releases it to the atmosphere. Each pump in the system actually feeds two sets of airbags and ...
3
votes
2answers
343 views
Are precision pneumatics possible?
I've seen some of the robotics competitions use pneumatic actuators for brute force actions ( like a hammer or lift ), but nothing precise. Is it possible to use pneumatics in a more precise scenario?,...
