The pilots and burners both have solenoids which wire directly to the ignition module, not the temperature controller. The ignition module power is switched on by the temperature controller of your choice and should be powered by a 40VA minimum 24 VAC transformer for one module, 75 VA for 2 modules. The solenoids prevent one of those "Doh" moments if you forgot to shut off pilot gas and something else lights off the escaping propane that gathered. The solenoids I chose have 24 volt "AC" coils which are compatible with the ignition module 24 VAC output to the valves, and are way cheaper than the ASCO equivalents. Do not try "DC" coils in an "AC" system as they will not work because coil and internal piston are not able to develop enough pull to open correctly, and usually buzz and then burn up in a few minutes.Can you just have the pilot light feed off your main line or does the intermittent Pilot Control everything? Are you using Love controllers with the solenoid valves?
The H19 Series high pressure valves provide complete shutoff in the event that the flame heating the thermocouple is extinguished. These high-pressure valves are designed for commercial and industrial applications such as heaters, crop dryers, etc, and are suitable for pressures up to 25 psi. They can be used with natural and LP gas. Sizes available are 1/4" NPT and 3/8" NPT.
Those valves from Valves for Projects are a very poor choice. The Baso H19 is more expensive but is much safer.
From the Baso Site:
Very poor choice? Maybe for you, but not for me. I've been using one of their valves for a long time with no problems at all. It's safe enough for me, but then I do not run the burners unattended. There is no way I would pay $250 for a gas valve. I'll take my chances with the $35 valve. I thrive living on the edge, but it's certainly not for everyone.
Lots of people are using non-thermocouple shut-off equipped gas valves. I think even Lonnie Mac did so with his now famous Brutus rig. IIRC, he used non-thermocouple equipped Asco gas valves which are similar to the valves from Valves4projects.
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