Valve is a tube. It is used to change the channel section and flow direction of medium, an apparatus for controlling the flow of the transmission medium. Specifically, the valve has the following purposes:
Connect or disconnect the line of media. Such as valve, closing valves, ball valves, plug valves, diaphragm valves, butterfly.
Regulation, control the pipeline flow and pressure of the medium. Such as throttle, regulating valves, Parts Oven Safety Valve, safety valves, etc.
Change the direction of media in the pipeline flowing. A dispensing valve, three cocks, three or four-way valve and the like.
Stop the line of medium back. Such as a variety of different structures valve, bottom valve.
Separation medium. Such as steam traps of various structures, air trap.
Instructions and regulate fluid levels. Such as liquid level indicator, level regulators and the like.
Other special purposes. As the temperature Gas Control Valve, overcurrent protection emergency shut-off valve.
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2015年5月31日星期日
2015年5月27日星期三
Safety valve selection factors should be considered:
(1) selection of the Water Heater Gas Valves structure, depending on the device characteristics of the process conditions and working medium. Under normal circumstances, boilers, pressure vessels, most use a spring-loaded safety valve. For toxic, flammable and explosive media, the selection of a closed valve. Boiler and pressure vessel and safety discharge larger and smaller in thickness and low pressure container the best selection of safety valve.
(2) safety valve operating pressure range of boilers and pressure vessels should be considered the maximum allowable working pressure of selection.
(3) Gas Top Burner Valve displacement must be greater than safety discharge device, to ensure that the boiler or pressure vessel overpressure valve can be discharged in the open part of the media, to avoid the pressure continues to rise inside.
(4) The boiler safety valve, the total emissions must be greater than the boiler maximum continuous evaporation, and the drum and superheater safety valve opens after all, the steam pressure in the drum must not exceed 1.1 times the design pressure.
(2) safety valve operating pressure range of boilers and pressure vessels should be considered the maximum allowable working pressure of selection.
(3) Gas Top Burner Valve displacement must be greater than safety discharge device, to ensure that the boiler or pressure vessel overpressure valve can be discharged in the open part of the media, to avoid the pressure continues to rise inside.
(4) The boiler safety valve, the total emissions must be greater than the boiler maximum continuous evaporation, and the drum and superheater safety valve opens after all, the steam pressure in the drum must not exceed 1.1 times the design pressure.
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