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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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