Previous in Forum: Atlas Copco Wiring Diagram   Next in Forum: Specialist Mechanical CAD software & FEA software or 2 in one software
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
11 comments
Rate Comments: Nested
RAKESH REDDY
Associate

Join Date: May 2011
Posts: 38
Good Answers: 1

Solenoid Valve Specifications

06/16/2011 5:42 AM

Dear All,

With respect to the subject, Solenoid valve is compleately new for me. I just know the basic working principle of solenoid valve. when i am reviewing the data sheets i came across foloowing words.

1.Single solenoid & Deenerize close

2.Duel solenoid & Energize open/close.

3. 3/2 & 5/2 direct operated and Pilot operated.

what does 3/2 and 5/2 indicates?

what is the difference between direct operated and pilot operated.

I Kindly request any one to clarify my doubts.

Regards,

Rakesh
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
4
jesw55
Power-User

Join Date: Aug 2010
Location: Wales, UK
Posts: 391
Good Answers: 18
#1

Re: Queries on Solenoid Valves

06/16/2011 5:59 AM

Hi RAKESH REDDY,

3/2 is 3 ports 2 position (open or closed)

5/2 is 5 ports 2 position (used to operate a double acting valve or cylinder)

Direct operated is where the solenoid armature directly opens the valve orifice or pushes the spool across in a 5/2 valve.

Pilot operated is where the solenoid armature opens the air orifice and the air opens the valve, or moves the spool, in the case of the 5/2 valve.

Hope this helps,

John

__________________
 Best advice I can give as you get older "Never miss an opportunity to relieve yourself"
Register to Reply Good Answer (Score 4)
Go to Next Good Answer
RAKESH REDDY
Associate

Join Date: May 2011
Posts: 38
Good Answers: 1
#2
In reply to #1

Queries on Solenoid Valves

06/16/2011 6:13 AM

Hi john,

Thank you very much for your valuble answer.

Pls also explain me where this 3 port and 5 port applicable. i mean ,as you said one is either solenoid may open or the pilot. then y the port numbers getting increased.

One more doubt sir, if solenoid can directly open valve orifice why should we go for pilot operation? is there any pressure criteria or based on service or any other factor ? kindly explain.

Regards,

Rakesh.
Register to Reply
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#3
In reply to #2

Re: Queries on Solenoid Valves

06/16/2011 6:22 AM

3-port is for a single-acting actuator; 5-port is for double-acting.

Pilot operation is for when the solenoid is so large that the coil itself is insufficiently powerful to operate the valve; the pilot valve brings an air supply onto the valve actuator to operate it, and the solenoid operates the pilot valve.

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply Score 1 for Good Answer
Go to Next "Almost" Good Answer
RAKESH REDDY
Associate

Join Date: May 2011
Posts: 38
Good Answers: 1
#5
In reply to #3

Re: Queries on Solenoid Valves

06/16/2011 6:41 AM

Thank you very much for your patience and valuble answer sir.
Register to Reply
Codemaster
Guru

Join Date: Jul 2005
Location: Stoke-on-Trent, UK
Posts: 4496
Good Answers: 137
#11
In reply to #2

Re: Queries on Solenoid Valves

06/17/2011 3:57 AM

Best to get diagrams from suppliers on the internet. That will show you how the ports are connected in energised and de-energised states.

Cheers.........Codey

__________________
 Give masochists a fair crack of the whip
Register to Reply Score 1 for Good Answer
No more "Almost" Good Answers.
RAKESH REDDY
Associate

Join Date: May 2011
Posts: 38
Good Answers: 1
#4
In reply to #1

Re: Queries on Solenoid Valves

06/16/2011 6:39 AM

Dear Sir,

for the same application he is offering single and duel solenoid.

in what way it is preffereble.plz expain usage and advantages

Kindly help me...

Regards,

Rakesh
Register to Reply
jesw55
Power-User

Join Date: Aug 2010
Location: Wales, UK
Posts: 391
Good Answers: 18
#7
In reply to #4

Re: Queries on Solenoid Valves

06/16/2011 6:53 AM

Hi RAKESH,

Single solenoid valves have to be kept energised to operate them against a return spring, where as, double solenoid valves only need a pulse signal to operate them and a different pulse signal to reset them.

Best regards,

John

__________________
 Best advice I can give as you get older "Never miss an opportunity to relieve yourself"
Register to Reply
Anonymous Poster #1
#6

Re: Queries on Solenoid Valves

06/16/2011 6:47 AM

http://en.wikipedia.org/wiki/Solenoid_valve
Register to Reply Score 1 for Good Answer
Go to Next "Almost" Good Answer
2
Tornado
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21017
Good Answers: 795
#8

Re: Solenoid Valve Specifications

06/17/2011 12:29 AM

Another type of dual solenoid valve can have a neutral position, with one solenoid for motion in one direction and a second solenoid for the opposite direction. (Such as forward/reverse on a motor, or extend/retract on a cylinder.)

__________________
 In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply Good Answer (Score 2)
No more Good Answers. Go to first "Almost" Good Answer
jesw55
Power-User

Join Date: Aug 2010
Location: Wales, UK
Posts: 391
Good Answers: 18
#10
In reply to #8

Re: Solenoid Valve Specifications

06/17/2011 3:08 AM

Hi Tornado,

That would be a 5/3 function valve with the option of Closed Centre, Open Centre or Pressure Applied, in the mid position.

(For our OPs information, not yours.)

Best regards,

John

__________________
 Best advice I can give as you get older "Never miss an opportunity to relieve yourself"
Register to Reply
Jagote
Associate

Join Date: Feb 2010
Location: Birmingham, England
Posts: 44
Good Answers: 2
#9

Re: Solenoid Valve Specifications

06/17/2011 3:06 AM

Try this:

http://www.nfpa.com/education/Edu_LearningOpps_SelfPacedFundamentalsPneumatic.asp

The tutorials will answer all of your questions.
Register to Reply Score 1 for Good Answer
Go to Next "Almost" Good Answer
Register to Reply
Have a Different Question?
11 comments

Good Answers:

These comments received enough positive votes to make them "good answers".

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Copy to Clipboard

Users who posted comments:

Anonymous Poster (1); Codemaster (1); Jagote (1); jesw55 (3); PWSlack (1); RAKESH REDDY (3); Tornado (1)

Previous in Forum: Atlas Copco Wiring Diagram   Next in Forum: Specialist Mechanical CAD software & FEA software or 2 in one software

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Mechanical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (83 right now)
Show Members
Advertisement