The water heater has now become a must-have item in the bathroom of the family, and plays a big role in the convenience of life. Before buying a water heater, many friends will entangle the electric water heater and the gas water heater. Which of the following is a comparative analysis from various angles, let's take a look.
From the point of view of ease of use and comfort. The water temperature of the gas water heater is stable and the heating speed is fast, while the electric water heater needs to wait for a while. If the bath is too long, the temperature of the electric water heater will gradually decrease due to the volumetric water discharge, and the friend who takes a long bath time should hurry.
From the perspective of environmental protection and installation and maintenance costs. Gas-fired water heaters consume a lot of energy. As the price of gas is getting higher and higher, the cost of using gas water heaters is relatively high, while electric water heaters can store hot water in valleys. The energy cost is relatively low, especially the price of electricity is relatively low. In rural areas, using electric water heaters will cost a lot.
From a security point of view. The gas water heater needs to be installed in an open space. When it is used, the doors and windows need to be opened. If the indoor air is not ventilated, the gas and water vapor can easily produce colorless and odorless carbon monoxide, which is likely to cause carbon monoxide poisoning. Electric water heaters are prone to electric leakage accidents, especially instant electric water heaters. For storage electric water heaters, it is best to turn off the power while bathing. However, electric water heaters now have anti-leakage systems, and their safety performance is relatively higher than before.
From the amount of hot water production. The gas water heater casing will be marked with 5L, 7L, 8L, 10L and so on. This is not the amount of water that can be installed, but the amount of hot water generated by raising the water temperature by 25 degrees Celsius within 1min. Electric water heaters are divided into three types: instant type, quick heat type and water storage type. The water output of the instant electric water heater is controlled by the power, usually 7500w is equivalent to the water output of the 5L gas water heater, that is, it is hot. The quick-heat electric water heater is an improved version of the storage-type electric water heater, which can reduce the warm-up time to 8 to 15 minutes. If it is a preheating hot double-mode electric water heater in the rapid heat, the water output of the 30L water heater can be Increased to 180L, it is enough for about 6 people to take a bath. The storage type electric water heater usually has a water capacity of 30 to 90 L or more. The storage type electric water heater needs to be separated by half an hour to heat a can of water. If it is used up, it still needs to wait for half an hour.
From the perspective of temperature stability. The gas water heater is a fast heating method that can be adjusted by the device and can be maintained at all times as long as it is used. The temperature control of instant electric water heaters can be divided into mechanical and thermostatic. The mechanical type is equivalent to the temperature control of the gas water heater. When it is adjusted to the proper position, the hot water will keep the temperature unchanged. The constant temperature electric water heater can accurately select the water temperature, which belongs to the intelligent control of the microcomputer. A tank of higher hot water stored in the storage type electric water heater can be adjusted to a suitable temperature by using a mixing valve with cold water during use. When the hot water is used up, the water will become colder and colder. According to the inconvenience of water storage type, the quick-heating electric water heater has improved the heating technology, and uses the preheating or hot double mode. When the hot water is not hot enough, the hot function is automatically activated, which can ensure the constant temperature of the water.
From the price point of view. The price of 8 liter gas water heaters is generally above 800 yuan, plus the installation fee is generally more than 1,000 yuan, and some even close to 2,000 yuan; and the price of electric water heaters is more than 1,000 yuan, plus the installation cost is generally less than 1,500 yuan. It is cheaper than gas water heaters.
From the point of view of the use fee. At present, natural gas is 1. 6 yuan per cubic meter, and electricity is 0.4 yuan per kilowatt hour. Since both are used to heat water, the heat is 1 kWh, the heat of 1 kWh of natural gas is 10 kW, the heat of 1 kWh of electricity is 1 kW, and the cost per kW of natural gas is 0.16 yuan. Electricity is 0. 40 yuan per kilowatt. Therefore, the cost of using an electric water heater is 2.5 times that of a gas water heater.
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There are five general body styles of ball Valves: single body, three-piece body, split body, top entry, and welded. The difference is based on how the pieces of the valve-especially the casing that contains the ball itself-are manufactured and assembled. The valve operation is the same in each case.
In addition, there are different styles related to the bore of the ball mechanism itself.
Ball valves in sizes up to 2 inch generally come in single piece, two or three piece designs. One piece ball valves are almost always reduced bore, are relatively inexpensive and generally are throw-away. Two piece ball valves are generally slightly reduced (or standard) bore, they can be either throw-away or repairable. The 3 piece design allows for the center part of the valve containing the ball, stem & seats to be easily removed from the pipeline. This facilitates efficient cleaning of deposited sediments, replacement of seats and gland packings, polishing out of small scratches on the ball, all this without removing the pipes from the valve body. The design concept of a three piece valve is for it to be repairable.
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