TTL-pulsed valve
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Posts: 46,084
Hi there. I want to try and do a controlled burn of propane under
transistor control. One could do some sort of servo setup, but I'm
thinking there's probably something that exists already to do this.
What I want is basically a valve, of some kind, which either:
- opens/closes on logic high / low.
- accepts a servo-style pulse for the degree to which it's going to be
used.
I know these exist, because I've seen them used , for example, in
timer-driven fake fireplaces.
Sean T. Lamont, CTO / Chief NetNerd, Abstract Software, Inc. (ServNet)
Seattle - Bellingham - Vancouver - Portland - Everett - Tacoma - Bremerton
email: lamont@a... WWW: http://www.serv.net
"...There's no moral, it's just a lot of stuff that happens". - H. Simpson
transistor control. One could do some sort of servo setup, but I'm
thinking there's probably something that exists already to do this.
What I want is basically a valve, of some kind, which either:
- opens/closes on logic high / low.
- accepts a servo-style pulse for the degree to which it's going to be
used.
I know these exist, because I've seen them used , for example, in
timer-driven fake fireplaces.
Sean T. Lamont, CTO / Chief NetNerd, Abstract Software, Inc. (ServNet)
Seattle - Bellingham - Vancouver - Portland - Everett - Tacoma - Bremerton
email: lamont@a... WWW: http://www.serv.net
"...There's no moral, it's just a lot of stuff that happens". - H. Simpson
Comments
I've used central heating boiler valves for this sort of thing. I'm not sure
what continent you are on, but if "central heating" is a odd phrase, I mean
gas-powered boiler heating systems.
These home/commecial gas valves are almost exclusively powered from AC
power - 110 v 250v etc. So to handle that sort of beast, I use a low power
transitor-switched MOSFET to operate a relay with contacts that will handle
AC at the rated voltage. That switches on the valve. Plus lots of fuses!!!
HTH
Tony
Original Message
From: "Sean T. Lamont .lost." <lamont@a...>
To: <basicstamps@yahoogroups.com>
Sent: Thursday, February 21, 2002 2:40 AM
Subject: [noparse][[/noparse]basicstamps] TTL-pulsed valve
>
>
> Hi there. I want to try and do a controlled burn of propane under
> transistor control. One could do some sort of servo setup, but I'm
> thinking there's probably something that exists already to do this.
>
> What I want is basically a valve, of some kind, which either:
>
> - opens/closes on logic high / low.
> - accepts a servo-style pulse for the degree to which it's going to be
> used.
>
>
> I know these exist, because I've seen them used , for example, in
> timer-driven fake fireplaces.
>
>
> Sean T. Lamont, CTO / Chief NetNerd, Abstract Software, Inc. (ServNet)
> Seattle - Bellingham - Vancouver - Portland - Everett - Tacoma - Bremerton
> email: lamont@a... WWW: http://www.serv.net
> "...There's no moral, it's just a lot of stuff that happens". - H. Simpson
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
Thanks,
Tony
Original Message
From: "ulibasic" <ulibasic@r...>
To: <basicstamps@yahoogroups.com>
Sent: Thursday, February 21, 2002 9:16 AM
Subject: AW: [noparse][[/noparse]basicstamps] TTL-pulsed valve
I have used such valves that open and close proportional to a 0 to 10 Volt
signal. I bought them in germany (RS electronics) but if you want I could
find out who makes them.
Just tell me.
Greetings, Uli
Urspr
valves and actuators in our HVAC systems for re-heat valves. There are a number
of types of inputs available for their valve actuators, voltage, current, pulsed
(tri-state), additionally some have feed back so you know what position the
valve is in at any given time. They have a good selection of valve sizes that
can be mounted on their actuators. For your project the tri-state type would
probably be suitable. In a typical HVAC system using a tri-state output, you
would pulse the valve’s inputs in one direction or the other based upon the set
point verses the current value. As you need more or less heat, pulses are longer
or shorter as well as the delay between pulses. These pulses serve only to
incrementally move the valve one way or the other. In other words the longer one
of the inputs is high, the longer the drive motor continues to spin in the
direction called for, if there are no pulses the valve stays in what ever
position it is currently at. This is a fairly crude control sequence, but it
does seem to suit the process well. Of course you will need to do some trial and
error. Also, you would need some type of feed back from the process to
accomplish an automated control sequence.
"Sean T. Lamont .lost." <lamont@a...> wrote:
Do You Yahoo!?
Yahoo! Sports - Coverage of the 2002 Olympic Games
[noparse][[/noparse]Non-text portions of this message have been removed]
and higher, these are not pulsed valves, they are on and off.
What you would need is a servo controlled valve for flame height
or size and a second for shutoff, any time a valve that may not
shut off completely when power is removed is a bad thing. So
using a mV valve from any floor or wall furnace will work for
safety. They use a Thermopile for pilot sensing and if there is
no pilot they will not turn on, if your circuit looses power then
a relay drops out and all is turned off.
Original Message
From: <tony.wells@a...>
To: <basicstamps@yahoogroups.com>
Sent: February 20, 2002 7:49 PM
Subject: Re: [noparse][[/noparse]basicstamps] TTL-pulsed valve
Hi Sean,
I've used central heating boiler valves for this sort of thing.
I'm not sure
what continent you are on, but if "central heating" is a odd
phrase, I mean
gas-powered boiler heating systems.
These home/commecial gas valves are almost exclusively powered
from AC
power - 110 v 250v etc. So to handle that sort of beast, I use a
low power
transitor-switched MOSFET to operate a relay with contacts that
will handle
AC at the rated voltage. That switches on the valve. Plus lots of
fuses!!!
HTH
Tony
Original Message
From: "Sean T. Lamont .lost." <lamont@a...>
To: <basicstamps@yahoogroups.com>
Sent: Thursday, February 21, 2002 2:40 AM
Subject: [noparse][[/noparse]basicstamps] TTL-pulsed valve
>
>
> Hi there. I want to try and do a controlled burn of propane
under
> transistor control. One could do some sort of servo setup, but
I'm
> thinking there's probably something that exists already to do
this.
>
> What I want is basically a valve, of some kind, which either:
>
> - opens/closes on logic high / low.
> - accepts a servo-style pulse for the degree to which it's
going to be
> used.
>
>
> I know these exist, because I've seen them used , for example,
in
> timer-driven fake fireplaces.
>
>
> Sean T. Lamont, CTO / Chief NetNerd, Abstract Software, Inc.
(ServNet)
> Seattle - Bellingham - Vancouver - Portland - Everett -
Tacoma - Bremerton
> email: lamont@a... WWW:
http://www.serv.net
> "...There's no moral, it's just a lot of stuff that happens". -
H. Simpson
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the
Subject and
Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
>
>
>
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
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On Thu, 21 Feb 2002, Larry Gaminde wrote:
> There are valves for gas service that range from mV to 220 vac
> and higher, these are not pulsed valves, they are on and off.
> What you would need is a servo controlled valve for flame height
> or size and a second for shutoff, any time a valve that may not
> shut off completely when power is removed is a bad thing. So
> using a mV valve from any floor or wall furnace will work for
> safety. They use a Thermopile for pilot sensing and if there is
> no pilot they will not turn on, if your circuit looses power then
> a relay drops out and all is turned off.
>
>
>
Original Message
> From: <tony.wells@a...>
> To: <basicstamps@yahoogroups.com>
> Sent: February 20, 2002 7:49 PM
> Subject: Re: [noparse][[/noparse]basicstamps] TTL-pulsed valve
>
>
> Hi Sean,
>
> I've used central heating boiler valves for this sort of thing.
> I'm not sure
> what continent you are on, but if "central heating" is a odd
> phrase, I mean
> gas-powered boiler heating systems.
>
> These home/commecial gas valves are almost exclusively powered
> from AC
> power - 110 v 250v etc. So to handle that sort of beast, I use a
> low power
> transitor-switched MOSFET to operate a relay with contacts that
> will handle
> AC at the rated voltage. That switches on the valve. Plus lots of
> fuses!!!
>
> HTH
>
> Tony
>
>
Original Message
> From: "Sean T. Lamont .lost." <lamont@a...>
> To: <basicstamps@yahoogroups.com>
> Sent: Thursday, February 21, 2002 2:40 AM
> Subject: [noparse][[/noparse]basicstamps] TTL-pulsed valve
>
>
> >
> >
> > Hi there. I want to try and do a controlled burn of propane
> under
> > transistor control. One could do some sort of servo setup, but
> I'm
> > thinking there's probably something that exists already to do
> this.
> >
> > What I want is basically a valve, of some kind, which either:
> >
> > - opens/closes on logic high / low.
> > - accepts a servo-style pulse for the degree to which it's
> going to be
> > used.
> >
> >
> > I know these exist, because I've seen them used , for example,
> in
> > timer-driven fake fireplaces.
> >
> >
> > Sean T. Lamont, CTO / Chief NetNerd, Abstract Software, Inc.
> (ServNet)
> > Seattle - Bellingham - Vancouver - Portland - Everett -
> Tacoma - Bremerton
> > email: lamont@a... WWW:
> http://www.serv.net
> > "...There's no moral, it's just a lot of stuff that happens". -
> H. Simpson
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed. Text in the
> Subject and
> Body of the message will be ignored.
> >
> >
> > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> >
> >
> >
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the
> Subject and Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and Body
of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
Sean T. Lamont, CTO / Chief NetNerd, Abstract Software, Inc. (ServNet)
Seattle - Bellingham - Vancouver - Portland - Everett - Tacoma - Bremerton
email: lamont@a... WWW: http://www.serv.net
"...There's no moral, it's just a lot of stuff that happens". - H. Simpson
plumbing supply house. a servo controlled valve not sure never
used one, but there are proportional valves on the market, there
very costly also.
Original Message
From: "Sean T. Lamont .lost." <lamont@a...>
To: <basicstamps@yahoogroups.com>
Sent: February 21, 2002 11:42 AM
Subject: Re: [noparse][[/noparse]basicstamps] TTL-pulsed valve
Do you know where I could find these?
On Thu, 21 Feb 2002, Larry Gaminde wrote:
> There are valves for gas service that range from mV to 220 vac
> and higher, these are not pulsed valves, they are on and off.
> What you would need is a servo controlled valve for flame
height
> or size and a second for shutoff, any time a valve that may not
> shut off completely when power is removed is a bad thing. So
> using a mV valve from any floor or wall furnace will work for
> safety. They use a Thermopile for pilot sensing and if there is
> no pilot they will not turn on, if your circuit looses power
then
> a relay drops out and all is turned off.
>
>
>
Original Message
> From: <tony.wells@a...>
> To: <basicstamps@yahoogroups.com>
> Sent: February 20, 2002 7:49 PM
> Subject: Re: [noparse][[/noparse]basicstamps] TTL-pulsed valve
>
>
> Hi Sean,
>
> I've used central heating boiler valves for this sort of thing.
> I'm not sure
> what continent you are on, but if "central heating" is a odd
> phrase, I mean
> gas-powered boiler heating systems.
>
> These home/commecial gas valves are almost exclusively powered
> from AC
> power - 110 v 250v etc. So to handle that sort of beast, I use
a
> low power
> transitor-switched MOSFET to operate a relay with contacts that
> will handle
> AC at the rated voltage. That switches on the valve. Plus lots
of
> fuses!!!
>
> HTH
>
> Tony
>
>
Original Message
> From: "Sean T. Lamont .lost." <lamont@a...>
> To: <basicstamps@yahoogroups.com>
> Sent: Thursday, February 21, 2002 2:40 AM
> Subject: [noparse][[/noparse]basicstamps] TTL-pulsed valve
>
>
> >
> >
> > Hi there. I want to try and do a controlled burn of propane
> under
> > transistor control. One could do some sort of servo setup,
but
> I'm
> > thinking there's probably something that exists already to do
> this.
> >
> > What I want is basically a valve, of some kind, which either:
> >
> > - opens/closes on logic high / low.
> > - accepts a servo-style pulse for the degree to which it's
> going to be
> > used.
> >
> >
> > I know these exist, because I've seen them used , for
example,
> in
> > timer-driven fake fireplaces.
> >
> >
> > Sean T. Lamont, CTO / Chief NetNerd, Abstract Software, Inc.
> (ServNet)
> > Seattle - Bellingham - Vancouver - Portland - Everett -
> Tacoma - Bremerton
> > email: lamont@a... WWW:
> http://www.serv.net
> > "...There's no moral, it's just a lot of stuff that
happens". -
> H. Simpson
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed. Text in the
> Subject and
> Body of the message will be ignored.
> >
> >
> > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> >
> >
> >
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the
> Subject and Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the
Subject and Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
>
>
>
Sean T. Lamont, CTO / Chief NetNerd, Abstract Software, Inc.
(ServNet)
Seattle - Bellingham - Vancouver - Portland - Everett - Tacoma -
Bremerton
email: lamont@a... WWW:
http://www.serv.net
"...There's no moral, it's just a lot of stuff that happens". -
H. Simpson
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
from the same email address that you subscribed. Text in the
Subject and Body of the message will be ignored.
Your use of Yahoo! Groups is subject to
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>Hi there. I want to try and do a controlled burn of propane under
>transistor control. One could do some sort of servo setup, but I'm
>thinking there's probably something that exists already to do this.
>
>What I want is basically a valve, of some kind, which either:
>
>- opens/closes on logic high / low.
>- accepts a servo-style pulse for the degree to which it's going to be
>used.
Check out Maxitrol. We use their valves for the ovens that we build
control systems for. Saft is another brand we evaluated - nice valves but
too small for most of the ovens.
Both valves use current to control output flow: the Maxitrol valves are
0-400 mA, the Saft valves are about 1/3 that. We have a nice little 4
channel card that drives 4 valves with either a 0-20 mA input or a
.25V-1.25V / 1V-5V input. It will also accept a PWM input (0-100% duty
cycle) with the addition of a simple opto-isolator interface.
The Maxitrol M551-1 valve is the one I am most familiar with - its good up
to about 500,000 BTU capacity. Maxitrol has much larger valves also - one
oven we did the controls for used 3 valves for a total of 30 million
BTUs. The Saft valves are VERY nice but they top out at about 150,000
BTU. Thats too small for 99% of the ovens we build control systems for.
Ask if you need further information - I'm sure I can dig up addresses and
phone numbers from our local supplier.
dwayne
Dwayne Reid <dwayner@p...>
Trinity Electronics Systems Ltd Edmonton, AB, CANADA
(780) 489-3199 voice (780) 487-6397 fax
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They make all types of commercial grade gas and fluid valves. They have them
for gas service. They are 120 VAC and 24 VDC units. I use the Opto-22 type of
solid state relays to control these valves. They are 3 amp units and take
care of all the noise filtering.
I wire them so a low output from the stamp activated the SSR.
Be very careful of leaky plumbing. Remember Propane has a perfume added to it
so you can smell it if it leaks.
Alan Bradford
Plasma Technologies