topbanner.gif
Login
Username

Password




Not a member yet?
Click here to register.

Forgotten your password?
Request a new one here.
Shoutbox
You must login to post a message.

09/28/2020 9:48 AM
Working on site improvements, bare with me. smoking

09/28/2020 8:58 AM
Where are the old themes ?!!! Shock

09/28/2020 12:46 AM
Made some changes, shoutbox was working without verification.

09/27/2020 2:53 PM
A lot of shoutbox spam attacks lately. roar

08/28/2020 7:15 PM
I have updated my signature and added links to the KKTO roaster build

Users Online
Guests Online: 1

Members Online: 0

Total Members: 6,748
Newest Member: Ivanwrowl
In Memory Of Ginny
Donations

Latest Donations
Anonymous - 5.00
Anonymous - 5.00
renatoa - 2.00
JitterzZ - 2.01
renatoa - 2.00

View Thread

Who is here? 1 guest(s)
 Print Thread
Automated propane gas control?
chmod755
What's the best method for controlling propane gas for a fluid bed roaster these days? I've seen some options but they're all from older posts.

I'm looking for a way to control propane gas flow using an arduino.

My roaster roasts about 1-5 pounds. I typically roast 1 to 2 pounds.

I currently use a Clippard DVP proportional valve with EVPD driver. Fuel source is a 20# propane tank with 20psi regulator. Fuel goes to a self-built burner that has a 0.021" (#75 drill bit) orifice.

The EVPD driver is connected to a TC4+ and arduino. I'm able to control the valve with direct analog commands or with an attached potentiometer.

The problem I'm having is somehow there doesn't seem to be much variation in the flame size whether I have the valve open at 5% or 100%.. I'm guessing the DVP valve needs a minimum PSI to work properly??

Are there better options for controlling propane for my case?
CoffeeInterest
You could look into DC driven fireplace valves
allenb
What is the pressure leaving the valve at max and min output?
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
allenb

Quote

chmod755 wrote:

I currently use a Clippard DVP proportional valve with EVPD driver. Fuel source is a 20# propane tank with 20psi regulator. Fuel goes to a self-built burner that has a 0.021" (#75 drill bit) orifice.

The problem I'm having is somehow there doesn't seem to be much variation in the flame size whether I have the valve open at 5% or 100%.. I'm guessing the DVP valve needs a minimum PSI to work properly??



Valve Type: 2-Way, Proportional
Medium: Air & Compatible Gases (40 micron filter)
Pressure Range: Vac* to 100 psig
Max. Hysteresis: 10% of full current
Max. Flow Tolerance: ±10%, -0%
Power Consumption: 1.9 watts at 72?F, 2.5 watts max.
Temperature Range: 32 to 120?F
Voltage: 10 or 20 VDC
Mounting: Manifold, #10-32 Male Stud
Seal Material: FKM standard; Nitrile, EPDM & Silicone available
Wetted Materials: Stainless Steel, PPS
CE, RoHS Compliant

*Vacuum applications are reverse flow
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
allenb
One more thing that is critical for a valve to be able to control flow effectively is that you ordered the valve based on your desired propane pressure and that they are given your desired max flow rate so the valve can correctly throttle the flow.

Pressure & Flow
In selecting your valve, reference the DVP Flow Capabilities
Chart on front and list your Nominal Operating Pressure in a
3-digit format (065 = 65 psig). Next specify your desired Max.
Flow Rate for your pressure (500 = 50.0 L/min)
. Accurately
specify your Nominal Operating Pressure and Flow to assure
the best performance and resolution for your application.
For Nominal Operating Pressure under 5 psig, use a 005
designator for Pressure. For Vacuum applications use the
positive pressure equivalent and reverse the ports.
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
Jump to Forum:

Similar Threads

Thread Forum Replies Last Post
Troubleshooting Hottop with TC4 +HTC fan control HotTop Roaster 1 09/20/2020 12:23 PM
My 3kg propane fluid bed roaster build Fluidbed Roaster 5 08/18/2020 1:42 PM
Gas Control advise needed Drum Roasters 18 03/02/2020 4:33 PM
Exploration Of the Hottop Characteristics III: Modified Profile Automated Roast HotTop Roaster 1 02/15/2020 1:46 PM
Propane Flow meter for fluidbed roaster Building a Coffee Roaster 21 02/02/2020 1:28 PM
Homeroasters Association Logo, and all Content, Images, and Icons © 2005-2016 Homeroasters Association - Logos are the property of their respective owners.
Powered by PHP-Fusion copyright © 2002 - 2020 by Nick Jones.
Released as free software without warranties under GNU Affero GPL v3.
Designed with by NetriX