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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 weather. Matthew Griffith, prevention section chief of the Montreal fire department, said that consumers should be looking for products that have safety certifications. The patio heater needs to be properly attached and there shouldn't be materials that could ignite nearby. Pressure Regulator Gas regulators are simple mechanical devices that we use in our cars and homes every day without even giving them a second glance. Their invention, made 135 years ago, has revolutionized the way natural gas and propane are used for cooking, heating and welding with oxy-fuel. The fundamental purpose of regulators is the same, however there are numerous variations. The regulator is based on an element that senses pressure, typically a fabric-reinforced dialythm to control a valve's position and restrict the flow of gas. The diaphragm is linked to the stem of the valve by rods that go through the set spring, over the diaphragm before entering the valve. The pressure of gas coming from the pipeline or from the house is detected by this mechanism, and it adjusts the position of the valve plug to align it to the demand of the house. As gas patio heater outdoor of gas in the house decreases the pressure between the regulator and the house reduces too. This causes the diaphragm to deflate downward, and it pushes the valve plug closer to the orifice, restricting the flow. As the demand for gas grows in the home the valve opens up more, increasing the flow. The valve plug is shut until the demand of the house decreases. This opens the valve to increase the flow. This process is called”sizing” and is the primary function of the regulator. When the valve is opened the pressure builds up in the main chamber, which is connected to the hose's outlet port by venturi tubes. This pressure can be adjusted by adjusting the screw or handle on the outside of the regulator. When the screw is turned counterclockwise it moves up and reduces the pressure; when it is turned clockwise, it reduces the pressure. When selecting a pressure regulator be aware that the maximum and minimal nominal pressures are established by commercial standards and NOT the pressure at the supply line. The regulator must be compatible with the hose you are using. Make sure you choose a hose that is whistle-free. It should have alternating rings with different sizes. This will prevent resonance noises from forming throughout the length. Thermocouple Thermocouples are based upon the principle that two dissimilar metals in contact at either end generate a voltage potential even when they are at different temperatures. They are used to detect temperatures that differ between points of an electrical circuit and convert that data into an electronic signal that can be read by a thermocouple gauge or other instrument. Thermocouples are superior to other sensors, such as thermistors. They can detect extremely high temperatures and function in corrosive environments. A pair of metals that are dissimilar is connected at one end of the sensor to form the measuring (aka hot) junction, while the other is kept at a constant temperature, referred to as the reference (aka cold) junction. Thermocouples are passive devices which means they do not require power to operate. The voltage generated is proportional to the temperature difference between the measuring junction and the reference junction. The thermocouple manufacturers and organizations that offer metrology standards, for example NIST offer reference tables for the function E (T). displaystyle scriptstyle e(T) for each specific thermocouple type. There are three types of thermocouple junctions- an exposed, grounded and weld wire. The type of junction that is exposed protrudes from the protective sheath and offers the fastest response. For measurements in corrosive conditions, a grounded thermocouple should be utilized. A welded wire thermocouple is physically separated from the sheath using mgO powder to stop the penetration of gas or moisture which could cause mistakes. The thermocouple that is welded is also a benefit in being more resistant to vibration. It is recommended to use it in extreme environments that have pressures up to 3000 psi. If a thermocouple is damaged, it is usually caused due to a lack of the polarity. If the sheath isn't properly polarized, the two ends of the thermocouple will be in a state of discordant voltages at the junction of measurement, which can cause an inaccurate reading and even cause damage to the instrument. A faulty thermocouple can also be caused by a poorly calibrated or installed sensor. Thermostat Unlike electric heaters which have to be wired into the wall Gas patio heaters are portable and utilize natural gas or propane cylinders to fuel. Thermostats regulate the flow energy into these cylinders to ensure that they do not overflow but still provide heat as needed. The thermostat senses the temperature of air passing over it. The thermostat also senses when the room has been cooled to a comfortable temperature and shuts off the heating. Digital thermostats are the most popular. It is controlled by a microcontroller which converts a fluctuating electrical resistance into a measurement of temperature. It can perform this more accurately than older mercury switch thermostats, which utilized mercury coils with three wires that would move based on temperature. This enabled it to tilt the mercury switch connected to the electrical circuit of a heater or air conditioning unit, turning it on or off. Another type of thermostat is one that's mechanical. It's an cylinder of small size filled with wax that starts to melt at a temperature, perhaps 180 degrees F (different thermostats are open at different temperatures). When the wax is hot, a rod that is connected to the thermostat opens the valve. As the room cools down, the wax contracts and the rod is pushed into the cylinder, closing the valve. There are thermostats that can be programmed to change at different times of the day. You can reduce energy usage by programming your heating system to be turned off and on while you're at work or sleeping, rather than being running all the time. You can also set your thermostat to turn on earlier so that you will arrive home to a comfortable temperature. Thermostats usually come with a feature known as a heat anticipator, which prevents the heater from turning on too early. This is because certain parts of the house reach the desired temperature before the thermostat has even been set. Pilot Light Many modern heating systems, homes and furnaces have done away completely from pilot lights. However older homes still rely on them to ignite gas in the burner chamber. 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 a thermocouple. This thermocouple generates electricity, and keeps the gas valve open. If the pilot flame ceases to burn the thermocouple cools and stops generating electricity, closing the gas valve. Pilot lights are utilized on a majority of propane and natural gas appliances, such as water heaters. Relighting a pilot light requires that you first turn off the gas valve at the appliance. You will then need to remove any panels or doors that could be blocking access to the pilot light. Follow the instructions on the front of the light to open the pilot light tube. Once you've reopened the pilot, turn the knob of the gas valve back to “on”. Safety is the primary reason for leaving the pilot light on. If it's accidentally extinguished and the gas that's constantly escaping from the pilot light tube can be accumulating in your home until sparks from an cigarette lighter or static electricity ignites it, causing an explosion. The tubes designed for pilots contain a built-in cutoff valve that can keep this from happening. A pilot light that is constantly burning is not only dangerous, but it also wastes energy. A pilot light can burn between $7 to $18 worth of gas each month, according to different studies. This waste of fuel also puts a heavier load on the air conditioning system during summer use. A pilot light may attract spiders that can spin webs, and clog up the pilot tubes. Additionally, a flame that is constant can emit trace amounts of the compound mercaptan, which creates the rotten egg smell found in natural gas. If you're ever worried about these issues, think about purchasing a gas fire with a remote control or replacing your fireplace with a more efficient and modern-day model.