QDQ421F liquid ammonia cut-off valve and ball valve difference is bigger, we can distinguish from the function to go up and the different function of ball valve and QDQ421F liquid ammonia cut-off valve, can also went up from ball Industrial Valves and QDQ421F liquid ammonia cut-off Industrial Valves structure. 【 Functional difference between 】 QDQ421F cut-off valve in liquid ammonia, in the absence of any external pressure operating Industrial Valves in a normally closed state, when used in the storage tank system, emergency shut-off valve and pump or cartridge, by hand or ammonia pressure valve to open, use under the pressure of oil or gas valve is fully open, when need to close the valve or when there is an emergency, can drain off oil pressure or ammonia pressure, the valve automatically shut down. Ball valve and QDQ421F liquid ammonia cut-off valve 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 】 【 QDQ421F liquid ammonia cut-off valve ball valve Summary 】 QDQ421F liquid ammonia cut-off valve and 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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