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                Stop valve for dark bar ammonia
                
				Dateline:2014-11-30    Hits:
				
				
                Product performance specification for Products Perfomance specification
                A, use and performance specification
                Pressure rating at room temperature test pressure (Mpa)
                Housing sealing seal test
                Nominal pressure (Mpa) 1.6 2.4 1.76 1.76
                2.5 3.75 2.75 2.75
                4 6 4.4 4.4
                Application of the temperature of -40~+80 DEG C
                Applicable medium ammonia, liquid ammonia, natural gas, liquefied petroleum gas,etc.
                This valve is used in the city of liquefied petroleum gas storage station, is also used inoil refineries, petrochemical plants, liquefied gas system in petrochemical plant, as theopening and closing device control medium cut
                Two, the operating principle and structure
                1, the hand wheel clockwise turn, the valve rod to move downwards, the valve flap down so that the sealing surface of sealing, the channel cut off. The downturn is open, the valve rod sealing effect referred to the highest point.
                2, the valve sealing a increased. In the valve open state, and filling the role with two seals, and has certain protective function to the filler
                3, the valve using nylon products as a sealing cover, packing soft forming filler, the seal for the soft material, good sealing performance.
                Three, the material of main parts:
                Part name materials
                The valve body valve cover WCB LCB CF8
                Stem Cr13 F304
                The valve clack of nylon 1010 F4 babbit alloy (B)
                The valve stem nut Cr13 F304
                Stuffing PTFE + NBR
                Shim XB450
                Handwheel nodular cast iron
                Four, the main dimensions and connection dimensions:
                DN L D D1 D2 B F Z-D H D0
                15130956545162 with 4- 14207120
                201501057555162 with 4- 14217120
                251601158565162 with 4- 14219120
                3219013510075182 with 4- 18280160
                4020014511085183 with 4- 18330200
                50230160125100203 with 4- 18350240
                65290180145120223 with 8- 18400280
                80310195160135223 with 8- 18430320
                100350135190160243 with 8- 23465360
                125400270220188283 with 8- 25558400
                150480300250218303 with 8- 25611400
                200600360310278343 with 12- 25710450

                				 
				
			
                
		
                

                



                


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