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Gas Patio Heater Regulator It's crucial to know how to use a propane patio heater if are looking to keep warm in the cold winter. Matthew Griffith, chief of the prevention section of Montreal's Fire Department says that shoppers should look for products that have safety certifications. The patio heater must be properly attached and there shouldn't be any combustible material nearby. Pressure Regulator Gas regulators are a simple mechanical devices that we drive through every day in our cars and at home without giving them a second thought. Their invention created 135 years ago, changed the way natural gas and propane is used for cooking, heating and welding using oxyfuel. The basic purpose of regulators is the same, but there are numerous variations. The regulator is based on an element that senses pressure, usually a fabric-reinforced dialythm to regulate a valve plug's position and restrict the flow of gas. The diaphragm connects to the stem of the valve with a rod which runs through the set spring and diaphragm before entering the valve. This mechanism senses the gas pressure inside the house or pipeline and adjusts the position of the valve plug to meet the demand. As the consumption of gas in the home decreases, so does the pressure between the regulator and the house. The diaphragm is deflated downward and the valve plug is moved closer to the orifice in order to stop flow. As the demand in the home increases, the valve opens further, increasing the flow of gas. The valve plug stays closed until the demand for the house decreases. This opens the valve to increase the flow. This process is referred to as size and is the primary function of the regulator. As the valve opens, pressure builds up in the main chamber which is connected to the hose's outlet port via venturi tubes. The pressure can be regulated by adjusting the screw or handle on the outside regulator. When the screw is turned counterclockwise it moves up and reduces the pressure; when it is turned clockwise, it lowers the pressure. When choosing a pressure regulator be aware that the minimum and maximum nominal pressures are determined by commercial standards and NOT the pressure at the supply line. The regulator must be compatible with the hose you are using. Find a hose that is marked as whistle-free with alternating rings of different sizes to prevent resonant sound from building up across the length of the hose. Thermocouple Thermocouples operate on the premise that different types of metals in contact with each other at their ends can produce the voltage even if they are at very varying temperatures. They are used to detect the temperature differences between two points in a system, and convert this data into an electrical signal that can be read by thermocouple meters or any other instrument. Thermocouples are superior to other sensors, for instance thermostors. They can detect extremely high temperatures and function in corrosive environments. The measuring (or hot) junction is created by connecting two dissimilar metals at one end, and at the other, the reference (or cold) junction, is kept at the same temperature. Thermocouples are passive devices, which means they do not require power to operate. The voltage generated is proportional the temperature difference between the measuring junction and the reference junction. Thermocouple manufacturers and metrology standard organizations such as NIST provide reference tables of the function E (T) Displaystyle scriptstyle e(T) for each specific thermocouple type. There are three main types of thermocouple junctions: an exposed, grounded and weld wire. The exposed style of junction protrudes out of the protective sheath and offers the fastest response time. For measurements in corrosive conditions, a grounded thermocouple should be employed. A thermocouple welded-wire is physically isolated from its sheath with mgO powder. This stops moisture or gas from penetrating and causing errors. The welded wire thermocouple also has the added benefit of being more vibration resistant. It is recommended to use in harsh environments and with pressures of up to 3000 psi. When a thermocouple is damaged, it's typically caused by a lack of the polarity. If the sheath is not been properly polarized, both ends of the thermocouple may have different voltages at their measurement junction. This can lead to an incorrect reading or damage the instrument. A malfunctioning thermocouple could be caused by an improperly calibrated or installed sensor. Thermostat Contrary to electric heaters, which need to be wired into the wall Gas patio heaters are portable and use natural gas or propane cylinders as fuel. Thermostats control the flow of energy to these cylinders so that they don't overflow, however they can still provide warmth when needed. The thermostat is able to detect the temperature of air passing over it. The thermostat also determines when the room is at a temperature that is comfortable and turns off the heating. The most popular type of thermostat is a digital one. It uses a microcontroller that converts a change in electrical resistance into a reading of temperature. It is able to do this more accurately than previous mercury switch thermostats that used mercury coils with three wires inside that would change according to temperature. This enabled the thermostat to tilt a mercury switch that was connected to an electrical circuit to the air conditioner or heater by turning it off and on. Another type of thermostat is a mechanical one. The thermostat is opened when the wax contained in the small cylinder begins to melt, which is approximately 180 degrees F. (Different thermostats have different opening temperatures). A rod that is connected to the valve is then pressed into this wax and opens the valve when it's hot. As the room cools, the wax expands, and the rod is pulled back into the cylinder, closing the valve. There are thermostats that can be programmed to change at different times of the day. You can save energy by programming your heating to turn on and off while you're at work or asleep, instead of being on all the time. You can also set the thermostat to come on earlier, so that your home is an ideal temperature when you return from school or work. Thermostats often come with a feature known as a heat anticipator, which stops the heater from turning on too early. This is because certain parts of the house reach the desired temperature prior to the thermostat is set. Pilot Light While many modern heating and homes have done away with pilot lights older furnaces and homes still use these devices to ignite gas in the chamber for burning. If the pilot light ever shut off, it's crucial to know how to re-light it safely. A pilot light produces tiny flames that heat the thermocouple. This produces electricity and keeps the gas valve open. When the pilot flame goes off, the thermocouple cools down and ceases to produce electricity, closing the valve. Pilot lights are utilized on the majority of natural gas and propane appliances, such as water heaters. To light patio heater gas regulator , it is necessary that you first shut off the gas valve in the appliance. The next step is to take out any doors or panels that could be blocking access to the pilot light. Locate the pilot light tube and carefully follow the procedure printed on the back of the appliance for opening it. After you've relit the pilot then turn the knob of the gas valve back to “on”. Safety is the main reason to keep the pilot light on. If you accidentally shut off the pilot light, gas that is constantly escaping from the tube can build up in your home until a spark or static electricity sparks the gas, causing an explosive explosion. The tubes designed for pilots include a built-in cutoff valve that can stop this from happening. A constant burning pilot light is not only dangerous, but it also wastes energy. A pilot light burns between $7 and $18 worth of gas every month, based on various studies. This wasted fuel creates a greater burden on the air conditioner during the summer. A pilot light can also attract spiders which can spin webs and clog the pilot tubes. Additionally, a flame that is constant can release trace amounts of the mercaptan compound that produces the rotten egg smell that is present in natural gas. If you're worried about these problems, consider getting a remote control gas fireplace or replacing your old fireplace with a more modern efficient model.