×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Pneumatic Valve Question?

Pneumatic Valve Question?

Pneumatic Valve Question?

(OP)
Hi, My name is Jesse and I am new to the forum. I am not an engineer by trade just a metal fabricator. I am hoping you guys could give me some advice on a project I am working on. I am looking for a pneumatic valve similar to the attached picture that has a spring return for the valve. Basically when I push the button in it will inflate an object and when I let go it will return to a neutral position where it will stop inflating and when I pull the button it will force air out the other valve and when I let go it will return to a neutral position. I have bought springs and cut them to a proper length to get the valves to work in this fashion but from a quality and safety stand point I will not be able to use my, "homemade valves" in the real world. Any advice were to purchase valves that work in that manner would be greatly appreciated. Thanks in Advance![img <a href='http://postimg.org/image/8ipt7teoh/' target='_blank'><img src='http://s24.postimg.org/8ipt7teoh/w4_4_R210_08_S.jp...' border='0' alt="w4 4 R210 08 S" /></a>]

RE: Pneumatic Valve Question?

You are describing the function of a 3-way valve with one of the inlets connected to source and the other to vent. Generally three-way valves have a lever instead of a push-pull switch because the pull-to-vent function is ergonomically awkward.

David Simpson, PE
MuleShoe Engineering

"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.
The plural of anecdote is not "data"

RE: Pneumatic Valve Question?


Hi!

The one you are searching for is a 5/3 manual valve with spring return. See symbol and example of one supplier (several wellknown exists worldwide) . http://catalog.airtec-usa.com/browser?&plpver=...

Explanation of symbol: 5/3 : five ports, three operating positions. Mid square shows neutral position and all ports(1 to 5) blocked, left square shows flow when lever (lever symbol far left) pushed left. Returns to mid position by spring when lever is not held (far left spring symbol, no hatched symbol showing detent). When lever is pushed right: flow as shown in far right square, with spring return as shown by far right spring symbol.

Contact supplier and discuss necessary flow at given pressures. Flow /cv not to be mixed with port size capacity, real flow opening may differ.

If you can accept two levers (one in, one out) two pieces 2/2 way with spring return might be cheaper.

Good luck!

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources