The Universal Valve drives or controls the main valve by discharging the medium from the pilot valve. The pilot valve itself is a standard spring loaded direct Globe Valve. Globe Valve are automatic valves and are mainly used in boilers, pressure vessels and pipelines to control pressure not to exceed specified values and play an important protective role in personal safety and equipment operation. According to the opening height of the Globe Valve, it can be divided into micro start Globe Valve and full start Globe Valve.
The main parameter of the Globe Valve is the displacement, which depends on the diameter of the valve seat and the opening height of the valve disc. Due to different opening heights, they are divided into slight opening type and full opening type. Micro start means that the opening height of the Universal Valve is 1/40~l/20 of the valve seat diameter. Fully open type means that the opening height of the Universal Valve is 1/4 of the valve seat diameter. Select the Globe Valve. The nominal pressure of the Globe Valve is determined by the working pressure. The temperature range of the Globe Valve is determined by the working temperature. The pressure range of the spring or lever is determined by calculating the pressure value of the Globe Valve. The material and structure type of the Globe Valve are then determined according to the medium used. , and then calculate the throat diameter of the Globe Valve based on the discharge volume of the Globe Valve. The following are general rules for selecting a Globe Valve.
(l) Micro-opening Globe Valve with wrenches are generally used in hot water boilers.
(2) Steam boilers or steam pipelines generally use fully open Globe Valve without a wrench.
(3) For liquids such as water that cannot be compressed, closed micro-opening Globe Valve or safety discharge valves are generally used.
(4) High-pressure water supply generally uses closed fully-open Globe Valve, such as high-pressure water supply heaters, heat exchangers, etc.
(5) Gas and other compressible media generally use closed, fully open Globe Valve, such as gas storage tanks, gas pipes, etc.
(6) E horizontal steam boilers generally use dead weight Globe Valve.
(7) Large-diameter, large-displacement, and high-pressure systems generally use Universal Valve, such as temperature and pressure reduction devices, power station boilers, etc.
(8) Train tankers, automobile tankers, storage tanks, etc., which generally use built-in Globe Valve to transport liquefied gas.
(9) A hydraulic Globe Valve is generally used on the top of the oil tank, which should be used in conjunction with the breathing valve.
(10) Globe Valve are generally used for underground drainage or natural gas pipelines.
