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Introduction of valve types

2022-01-19 10:59:06
times

Valve is control flow of fluid medium flow, flow direction, pressure, temperature and other mechanical devices, valves are the basic parts of the pipeline system.


Gate valve, globe valve, butterfly valve are suitable for what occasions


1, the three kinds of valves according to the switch is difficult to arrange: globe valve, gate valve, butterfly valve


According to the resistance size: globe valve, butterfly valve, gate valve;


Strictly arranged according to the close: globe valve, butterfly valve, gate valve;


In order of price: globe valve, butterfly valve, gate valve; (except special butterfly valve)


These three kinds of valve belong to the drive valve, according to the above characteristics, it is not difficult to see that the globe valve is mainly used for small-caliber pipeline (branch) or pipeline end opening and closing and flow regulation; Butterfly valve is used for opening and closing of branch pipe and flow regulation; Gate valves are used to open and close dry pipes, not for flow regulation.




(1) the gate


The body length is moderate, the rotary regulating rod, the regulating performance is good, is widely used in the large pipe diameter pipeline;




(2) the globe valve


Long valve body, rotary regulating rod, good regulating performance, suitable for spacious site, small pipe diameter occasions (general DN is less than or equal to 150mm);




(3) the butterfly valve


The valve body is short, the handle type regulating rod, the regulating performance is slightly poor, the price is higher, but the regulating operation is easy, suitable for the occasion of small site, large pipe diameter (general DN>150mm).




2, chiller, heat exchanger import and export, main pipe adjustment, can choose gate valve, globe valve or butterfly valve according to the situation;




3, points, water collector, because the main function is regulation, generally choose globe valve or gate valve;




4, the pump inlet is equipped with a valve, the outlet is equipped with two valves. The outlet end is close to the pump side valve so far back valve, the other two valves can choose gate valve, globe valve or butterfly valve;




5. Globe valve or ball valve can be used for small diameter pipe of entrance and exit of heating and air conditioning terminal equipment;




6, multi-storey, high-rise building each layer of horizontal pipe can be half, equipped with balance valve, to balance the flow of each layer;




7, the lowest water tank and pipes, equipment equipped with the sewage valve, because it is not used for regulation, should choose can close the valve, such as gate valve, globe valve, etc.;




8, steam - condensate pipeline system, such as steam heating system, boiler water system, steam lithium bromide chiller, steam - water heat exchanger system, generally installed in the steam inlet pressure reducing valve; Install safety valve where high pressure may be generated; A trap is provided at the outlet of condensate.


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