Y43H piston valve Product Description: Overview: Y43H piston valve for steam piping. By adjusting the relief valve, the inlet pressure dropped to make a desired outlet pressure, when the inlet pressure or flow fluctuation, pressure reducing valve depend on the energy of the medium itself can automatically maintain the outlet pressure fluctuations within a small range. Main parts and materials: Part Name Material Body, bonnet gray cast iron, steel, stainless steel valve pay, pay seat, the main valve diaphragm valve, the main valve seat, piston valve spring stainless pay, the main valve spring Ming-vanadium steel regulator Spring silico-manganese steel alloy cast iron piston ring main dimensions: (flange size PN1.6, PN2.5MPa by JB / T79-94 standards, PN4.0, PN6.4MPa by JB / T79-94 standard) Nominal pressure PN ( MPa) nominal diameter DN (MM) Dimensions (MM) LH H1 1.6 20 160 89 312 25 180 101 315 32 200 107 320 40 220 113 325 50 250 120 335 65 260 125 340 80 310 140 360 100 350 150 390 125 400 190 415,150,450,205,440 200,500,220,475,250 600,270,545,300,800 335,575,350,850,390 650,400,900,430,705 2.5 2,520,010,131,532,200,107 320 4,022,011,332,550,250,120 335 6,526,012,534,080,310,140 360 100 350 150,390,125,400,190 425,150,450,210,445 200,500,245,485,250 600,270,545,300,800 335,575,350,850,390 650,400,900,430,710 4.0 2,520,010,131,532,220,107 320 4,024,011,332,550,270,120 335 6,528,014,036,580,330,150 385 100 380,150,385,125,450 190,425,150,500,210 445,200,560,245,485 6.3 (6.4) 2,520,011,037,032,220,125 380 4,024,013,039,550,270,135 4,056,530,014,541,080,330 170 445 100 380,175,455,125,450 245,504,150,500,280 555,200,560,310,581