Gas metering is a big part of what we offer customers. One product that has proven to be very successful is the Honeywell Smart Multivariable (SMV) Transmitter. It is an industry leader – there are no others on the market that work as well. It measures the gas pressure & temperature and measures a differential pressure across a primary element. The primary element can be an orifice plate or a Preso Ellipse pitot tube. It creates a differential pressure that we measure and relate to flow (the square root of the pressure drop is proportional to the flow rate). The SMV calculates a corrected flow by accounting for the compressibility of the gas along with the pressure and temperature that exist in the pipe. It is quite an involved calculation that is pre-loaded into the transmitter and set up using a software wizard. Please keep it in mind for gas metering applications – it is an affordable alternative. For under $4000 you can measure big flows accurately with easy installation. [Read more…]
The ASCO relay control panels are designed to operate ASCO 120 volt and DC solenoid valves controlling gas flow to school kitchens, domestic cooking classes, metal shops, and laboratories. Many situations now call for a way to lock out gas supplies during closed hours.
Operating the key switch on the 108D10C (DC panel) or the 108D90C (120 AC panel), the control station energizes the relay to open a normally closed ASCO gas solenoid which turns on the gas flow.
*If the control voltage is lost completely or is reduced to approximately 50% of normal value, the relay de-energizes the normally closed valve to shut off gas flow.
*The gas valve will not re-open at restoration of power until an authorized person operates the key switch on the control station. The gas may also be shut off by depressing the normally closed pushbutton switch located on the control station.
*Shallow NEMA 1 flush-mounted enclosure.
*Clearly marked terminals and installation drawing on inside panel cover.
*Optional auxiliary pushbuttons 173A19 and 173A20 may be located at various accessible locations throughout the building.
*Explosion proof gas valves from ½” to 2” available.
If you are a Stromquist customer located in Georgia or Florida and you need help sizing or ordering an ASCO Gas Control Panel you can contact Stromquist and Company at www.stromquist.com or call us at 1-800-241-9471 1-800-241-9471. All others can order this product from one of our affiliates at CGNA.
You can’t get heat and your troubleshooting skills (hopefully learned at a Stromquist & Company training class) have lead you to the conclusion that your gas valve will have to be replaced. Being the great technician that you are, you write down all the information and part numbers of the furnace or heater you are working on and head off to see Bob, Jerry, or Mark at the Stromquist counter to get a new valve.
After driving across town you are less than happy when you are told that the replacement gas valve cannot be determined by the furnace or heater number. Although there are hundreds of gas heater and furnace manufacturers, there are only three major controls companies that make gas valves for these companies: Honeywell, White Rodgers, and Robertshaw. What makes it tricky is that these three companies will make and sell these valves as OEM (original equipment manufacturer) parts for all these different heater companies and will put different part numbers on them. In some cases, the valves even function differently.
Why would a manufacturer want a different part number? For one thing it makes it very difficult for you to get a replacement valve at your local distributor. Think about it, these companies are in business to make money and if you have to come back to them for your replacement parts, they are able to sell more products. The problem with this is that very few of them have local inventory, and since they are manufacturers instead of wholesalers, quick shipping is usually not one of their skill sets. So you have to wait, which is usually not an option when your heat is not working. In a few cases the valve is built differently and you have no choice but to go back to the manufacturer, which usually results in you paying higher prices and dealing with longer lead times.
The good news is that with the right information, your local distributors like Stromquist & Company can provide you with the right gas valve at the right price. To make sure you get the right valve, either take the bad valve out and bring it into your local distributor or use your camera and take pictures of the valve, making sure to get the part numbers in the picture. Make sure to watch Mark’s video, Replacing Gas Valves On Furnances and Hot Water Heaters.
There are hundreds of furnace and heater manufacturers out there, yet there are only three main companies that make the gas valves for all these heaters. The companies that make the gas valves usually put a different part number on the valves for each of these heater companies. This makes finding the right replacement valve tricky.
Although you can go back to the manufacturer to buy replacement parts using the part number of the heater, you usually wind up paying a lot more for the valve and will have a hard time getting the valve shipped quickly.
The best choice is going to a local wholesaler like Stromquist & Company, or another company within CGNA ( Controls Group North America).
When you go to the local wholesaler don’t make the same mistake most people do. Most people take the part number off of the furnace, but we need the number off of the gas valve itself. In this video, Mark from Stromquist & Company will show you where it is.