GTG, GDG light hole and the ball valve difference is bigger, we can distinguish from the function to go up and ball valve and GTG, GDG light hole of different function, can also went up from ball valve and GTG, GDG pervious to light hole structure. 【 Functional difference between 】 GTG, GDG light hole in the roof, daylighting and ventilated for tank installation and cleaning. The daylighting of the oil tank is located in the roof, generally for the round hole with a diameter of 500 mm, usually have to bolt hole cover ring tightly closed. In the oil tank cleaning overhaul, to lighting, ventilation and exhaust. Ball valve and GTG, GDG light hole difference is bigger, ball valve, 球阀) Opening and closing is a sphere, driven by the valve stem, and for ball valve axis rotate 90 & deg; Open or closed. Can also be used on regulation and control of fluid, mainly used for cutting in line, distribution, and change the flow direction of medium, good sealing, convenient operation, opening and closing fast, simple structure, small volume, small resistance, light weight, etc. 【 Physical difference between 】 【 GTG, GDG light hole ball Industrial Valves Summary 】 GTG, GDG light hole and the ball valve and using the difference function, are quite different in application, in the selection of a certain need to pay special attention to diameter, pressure, material and use of media, whether at design time, or in the purchase, must be in strict accordance with the relevant technical requirements.
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