The boiler pressure gauge how to choose?

Boiler is a kind of energy conversion equipment, the energy input to the boiler is the chemical energy of the fuel, power, boiler output has certain heat of steam, hot water or organic heat carrier. Refers to the literal meaning of the pot on the fire to heat the water container, furnace refers to the place of fuel combustion, boiler including boiler and furnace of two parts. Hot water or steam boiler of can directly provide the required heat energy for industrial production and people's life, also can be converted into mechanical energy by steam power device, or by a generator converts mechanical energy to electrical energy. Provide hot water boiler is called hot water boiler, mainly for the life, also have a small amount of application in industrial production. Generate steam boiler called steam boiler, often referred to as 'for boiler, used for power generation, shipbuilding, locomotive and industrial and mining enterprises. Industrial boilers are usually equipped with a safety valve, pressure gauge, water level gauge, thermometer, etc. , to ensure its safe operation. Selects the pressure gauge shall comply with the following: 1) For the rated steam pressure < 2. 5 mpa boiler, precision pressure gauge should not be less than 2. Level 5; For the rated steam pressure is greater than or equal to 2. 5 mpa boiler, the accuracy of the pressure gauge should not be less than 1. Level 5. 2) Pressure gauge should be selected according to pressure of work. Pressure gauge dial scale limit value shall be the working pressure of 1. 5 to 3. 0 times, had better choose 2 times. 3) Pressure gauge dial size should guarantee the stoker personnel can clearly see that pressure index, the dial should not be less than 100 mm in diameter.