300X slow closing check valve from the main valve, check valve, needle valve, ball valve, micro-filter and pressure gauge hydraulic control over the system. Use of hydraulic automatic operation, can get the best of the main valve opening or closing speed. Chung prevent water hammer water production, in order to achieve the effect of slow closing muffler. 300X slow closing check valve utilizing hydraulic self-control, no other devices and energy, maintenance is simple, open and close smoothly slow. 300X slow closing check valve is widely used in high-rise buildings, living quarters and other water supply systems and urban water supply project. Nominal pressure (Mpa) Shell test pressure (MPa) Sealing test pressure (MPa) Applicable medium medium temperature (℃) 1.0 1.5 1.1 Water 0-80 1.6 2.4 1.76 2.5 3.75 2.75 300X slow closing check valve main parts and materials Part Name Part Materials Body Bonnet WCB seat valve disc of copper alloy nitrile rubber O-ring seals stem 2Cr13 needle valve spring 50CrVA copper alloy copper alloy ball float valve copper alloy stainless steel micro filter 300X slow closing check valve parts list: 1, needle 2, the main valve 3, 4 valve, pressure gauge 5, one-way valve 300X slow closing check valve connection size DN LA A1 H H1 FD mm D1 mm D2 mm n-Φd mm mm mm mm mm mm PN1. 0 PN1.6 PN2.5 PN1.0 PN1.6 PN2.5 PN1.0 PN1.6 PN2.5 PN1.0 PN1.6 PN2.5 20 180 282 200 172 106 116 105 105 105 75 75 75 58 58 56 4-13.5 4-13.5 4-1425180282 200 172,106,116,115,115 115,858,585,686,865 4-13.5 4-13.5 4-14 32180282200172 106,116,140,140,140 100,100,100,787,876 4-17.5 4-17.5 4-18 40240320210265 210,170,150,150,150 110,110,110,888,884 4-17.5 4-17.5 4-18 50 240,320,210,265,210 170,165,165,165,125 12512510210299 4-17.5 4-17.5 4-18 65 250,330,215,310,215 180,185,185,185,145 145,145,122,122,118 4-17.5 4-17.5 8-18 80 285,350,220,350,245 210,200,200,200,160 160,160,133,133,132 8-17.5 8-17.5 8-18 100 360,410,230,460,305 275,220,220,235,180 180,190,158,158,156 8-17.5 8-17.5 8-22 125 400,420,245,520,365 310,250,250,270,210 210,220,184,184,184 8-17.5 8-17.5 8-26 150 455,430,260,570,415 355,285,285,300,240 240,250,212,212,211 8-228-228-26 200 585,440,280,695,510 460,340,340,360,295 295,310,268,268,274 8-22 12-22 12-26250650450 300,780,560,500,395 405,425,350,355,370 32032033012-22 12-2612-30300 800,460,320,902,658 580,445,460,485,400 410,430,370,370,389 12-2212-26 16-30350860470 340 1,025,696,640,505,520,555 460,470,490,430,430 44816-2216-26 16-33 4,009,604,803,601,080,735 715,565,580,620,515 525,550,482,482,503 16-2616-30 16-364501075 5,303,951,030,610,780,615 640,670,565,585,600 53255054820-26 20-3020-36500 10755804201135 665 830,670,715,730,620 650,660,585,585,609 20-2620-33 20-366001230 6,004,451,270,725,920,780 840,845,725,770,770 68568572020-30 20-3620-39700 16507304951460 865 980,895,910,960,840 840,875,800,800,820 24-30 24-36 24-42 800 1750 830 530 1640 925 1050 1015 1025 1085 950 950 990 905 905 928 24-33 24-39 24-48 300X slow closing check valve installation diagram