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Gas Patio Heater Regulator If you're planning to warm inside the cold winter air with a propane patio heater, it's crucial to be aware of how to make use of this device. Matthew Griffith, chief of the prevention department at Montreal's Fire Department, suggests that customers look for products that have safety certifications. It's also important to ensure that no combustible materials are nearby and that the patio heater is properly connected. Pressure Regulator Gas regulators are simple mechanical appliances we use in our homes and cars every day without giving them a second glance. Their invention, 135 years ago, has changed the way natural gas and propane are used for heating, cooking and welding with oxy-fuel. The fundamental function of regulators is the same, however there are many variations. The regulator utilizes an element that senses pressure, typically a dialythm made of fabric, to control a valve plug's position and restrict the flow of gas. The diaphragm is linked to the stem of the valve by rods that run down through the set spring, through the diaphragm and into the valve. The gas pressure from the pipeline or the house is detected by this mechanism and it adjusts position of the valve plug to align it with the demand from the house. As the use of gas in the house decreases the pressure between the regulator and the house decreases as well. The diaphragm begins to shrink downwards, and it pushes the valve plug closer to the orifice, restricting the flow. As the demand in the house grows the valve expands, increasing the flow of gas. When the valve plug is closed it is held in position by the spring force until the demand of the house drops, which opens the valve to increase flow. This process, referred to as”sizing,” is the basic operation of the regulator. As the valve opens the pressure builds up in the main chamber, which is connected to the outlet port of the hose via venturi tubes. This pressure is controlled by adjusting a screw or handle located on the exterior of the regulator. When the screw is rotated counterclockwise, it raises the pressure. When it is rotated clockwise, it reduces the pressure. When choosing a regulator for pressure be aware that the nominal maximum and minimum pressure is determined by commercial standards, not the pressure of the gas in the supply line. The regulator should also be compatible with the hose you are using. Choose a hose which is labeled as whistle-free, that has various sizes of rings to prevent resonant sound from accumulating along the length of the hose. Thermocouple Thermocouples operate on the principle that two dissimilar metals in contact at either end generate a voltage potential even if they are at very different temperatures. They are used to measure the temperature differences between two points in a system, and transform this information into an electrical signal that can be read by thermocouple meter or another instrument. gas patio heater regulator have several advantages over more common sensors, such as thermistors including the ability to measure extremely high temperatures and operate in harsh environments. The measuring (or hot) junction is formed by connecting two dissimilar metals at one end, and at the other, the reference (or cold) junction, is kept at the same temperature. Thermocouples produce small voltages, but they are passive devices that don't need power to function. The voltage generated is proportional to the temperature difference between the measuring junction and the reference junction. Thermocouple manufacturers and metrology standards organizations like NIST provide tables of reference for the function E (T) displaystyle scriptstyle e(T) for each specific thermocouple type. There are three kinds of thermocouple connections: exposed grounded and welding. The exposed junction style extends out of the protective sheath, and provides the fastest response time. A thermocouple grounded is recommended for use in environments with corrosive elements. A thermocouple welded-wire is physically separated from the sheath with mgO powder. This stops moisture or gas from penetrating and causing error. A thermocouple welded to a wire comes with the added benefit of being more resistant to vibration. It is recommended to use it in abrasive environments that require pressures up to 3000 psi. A thermocouple that is damaged is usually caused by an insufficient polarity. If the sheath is not properly polarized, the two ends of the thermocouple have unequal voltages at the junction of measurement which could result in an inaccurate reading and possibly cause damage to the instrument. A sensor that is not properly calibrated or installed can also cause a faulty thermocouple. Thermostat Gas patio heaters unlike electric heaters which are wired to the wall they are portable and run on natural gas or propane. The thermostats regulate the flow energy to these cylinders so they don't spill over, but can still provide heat when required. The thermostat accomplishes this by measuring the temperature of air that is passing through it. The thermostat also detects when the room has been cooled to a comfortable temperature, and switches the heating off. Digital thermostats are among the most commonly used. It uses a microcontroller to convert a changing electrical resistivity into a temperature reading. It can perform this more accurately than older mercury switch thermostats that employed an mercury coil with three wires that would change according to temperature. This enabled it to tilt a mercury switch connected to the electrical circuit of an air conditioning or heater unit, and turn it on or off. A mechanical thermostat is a different type. The thermostat opens when the wax in a small cylinder starts to melt, which is around 180 degrees F. (Different thermostats have different opening temperatures). A rod that is connected to the valve then presses into the wax and opens the valve when it's hot. As the room cools, the wax expands and the rod gets pulled back into the cylinder, closing the valve. You can also program thermostats to change the temperature at various times throughout the daytime. You can save energy by setting your heating to switch off and on when you are at work, or sleeping, rather than being always on. You can also set your thermostat to turn on sooner to ensure that you arrive home to a comfortable temperature. Thermostats often come with a feature known as a heat anticipator, which stops the heater from coming on too early. This is due to the fact that different areas of the house typically reach the set temperature before the thermostat does. Pilot Light Although many modern homes and heating systems have done away with pilot lights, older homes and furnaces still use these devices to light the gas in the chamber for burning. It's essential to know how to safely to relight the pilot light in case it ever fails. A pilot light produces small flames that are heated by the thermocouple. The thermocouple generates electricity and keeps the gas valve open. When the pilot flame stops, the thermocouple cools down and ceases to produce electricity, thus closing the valve. Pilot lights are utilized in a wide range of propane- and natural gas-powered appliances, including water heaters, fireplaces, barbecues, grills, furnaces and hot tubs. To relight a pilot light, you must first shut off the gas in the appliance. You must then take off any doors or panels that may be blocking the access to the pilot light. Find the pilot light tube, and follow the instructions on the back of the appliance for opening it. After you've lit the pilot light, return the knob on the gas valve to the “on” position. Safety is the main reason for leaving a pilot light on. If you accidentally shut off the pilot light, the gas that is constantly escaping from the tube can build up in your home until an electric spark or static charge ignites the gas and causes an explosive explosion. The tubes designed for pilots include an inbuilt cutoff valve to keep this from happening. A constantly burning pilot light is not just dangerous but also wastes energy. Different studies have proven that a pilot light can consume between $7 and $18 of gas per month. This waste of fuel also puts more strain on the air cooling system in summer. Another issue with pilot lights is that it can attract spiders, who can spin webs that clog the pilot tubes. Also, a constant flame can release trace amounts of the compound mercaptan, which causes the rotten egg odor that is found in natural gas. If you're ever worried about these issues, you should consider purchasing a gas fireplace with a remote control or replacing a fireplace with a more efficient, modern-day model.