YGa43H high sensitivity large flow of steam valve from the main valve and pilot valve composed of two parts. Main valve consists of a valve seat, the main valve plate, piston, springs and other parts. Pilot valve consists of a valve seat, valve, diaphragm, spring, adjusting spring and other parts. This product is based on the common valve significant improvements, increased piston area, changing the throttle structure. Change the seal in the form, increasing the flow area, etc., thereby improving the sensitivity, flow, and other aspects of life has greatly improved the performance. YGa43H high sensitivity large flow of steam valve is mainly used for steam pipes, suitable for high traffic flow changes, variation in inlet pressure steam lines. The main technical parameters Nominal pressure (Mpa) 1.6 2.5 4.0 6.4 10.0 16.0 Shell test pressure (Mpa) * 2.4 3.75 6.0 9.6 15.0 24 Sealing test pressure (Mpa) 1.6 2.5 4.0 6.4 10.0 16.0 maximum inlet pressure (Mpa) 1.6 2.5 4.0 6.4 10.0 16.0 outlet pressure range (Mpa) 0.04-1.0 0.05-1.6 0.08-2.5 0.2-3.5 0.5-3.5 0.5-4.5 Pressure Characteristics deviation (Mpa) △ P2P GB12246-1989 flow characteristic deviation (Mpa) P2G GB12246-1989 minimum differential pressure (Mpa) 0.07 0.1 0.15 0.4 0.5 0.8 leakage GB12245-1989 *: shell test does not include the diaphragm, cover the main part materials Part Name Material Body parts bonnet bottom WCB 2Cr13 valve seat piston aluminum cylinder liner Bronze iron alloy cast iron piston ring diaphragm 1Cr18 Ni9 / p-phenylene pilot seat pilot rod guide 2Cr13 main valve spring 50CrVA Fazhu spring 50CrVA adjusting spring 60Si2Mn flow coefficient Cv DN 50 65 80 100 125 150 200 250 300 350 400 500 Cv 1 2.5 4 6.5 9 16 25 36 64 100 140 250 main dimensions nominal diameter DN Dimensions LH Hl 1.6 / 2.5MPa 4.0MPa 15 160 180 265 85 20 160 180 265 85 25 180 200 280 95 32 200 220 280 95 4,022,024,029,010,550,250 270 30013065280300 315 145 80310330330170 100,350,380,405,200 125,400,450,450,225 150,450,500,485,265 200,500,550,570,290 250,650,640,325,300 800,740,360,350,850 810 395 400 9,009,504,305,009,501,080 500 km diameter DN Dimensions LH Hl 6.4MPa 10.0 / 16.0MPa 15 180 180 280 100 20 180 200 280 100 25 200 220 300 115 32 220 230 300 115 40 240 240 315 130 50 270 300 34013565300340 355 150 80330360370175 100,380,450,205,125 450,510,235,150,500 555,275,200,550,640 300,250,650,720,335 300,800,830,375,350 8,508,804,104,009,001,020 4,455,009,501,080,515