Manual flapper valve is widely used in building materials, metallurgy, chemical, electrical and other industries, as the hopper discharge means all kinds of dust removal equipment and a variety of mills, dryers, silos and other equipment to the discharge device to prevent wild into the wind. Manual way flapper valve [square mouth] The main technical parameters: Category (Sort) ABC A1 × A1 B1 × B1 C1 × C1 H H1 ℃ L N-φ pressure (Pressure) unidirectional (Mono-Directional) φ300 φ260 φ200 306 × 306 250 × 250 200 × 200 180 100 ≤150 720 8-φ13 0.1 φ320 φ280 φ220 326 × 326 270 × 270 220 × 220 180 100 760 8-φ15 φ340 φ300 φ240 346 × 346 290 × 290 240 × 240 180 100 800 8-φ15 φ360 φ320 φ260 366 × 366 310 × 310 260 × 260 200 120 840 8-φ18 φ380 φ340 φ280 386 × 386 330 × 330 280 × 280 200 120 880 8-φ18 φ400 φ360 φ300 406 × 406 350 × 350 300 × 300 200 120 920 8-φ18 φ420 φ380 φ320 426 × 426 370 × 370 320 × 320 200 120 960 8-φ18 φ440 φ400 φ340 446 × 446 390 × 390 340 × 340 200 120 1000 8-φ18 φ500 φ460 φ400 516 × 516 450 × 450 400 × 400 220 140 1120 8-φ18 φ540 φ500 φ440 556 × 556 490 × 490 440 × 440 220 140 1200 8-φ18 φ610 φ560 φ480 596 × 596 550 × 550 480 × 480 220 140 1295 16-φ18 φ660 φ610 φ500 660 × 660 610 × 610 500 × 500 220 140 1350 16-φ18 bidirectional (Bi-Directional) φ706 φ660 φ600 706 × 706 660 × 660 600 × 600 240 160 1600 16-φ18 φ820 φ770 φ700 820 × 20 770 × 770 700 × 700 240 160 1800 20-φ18 φ920 φ870 φ800 920 × 920 870 × 870 800 × 800 270 180 2000 20-φ18 φ1030 φ975 φ900 1030 × 1030 975 × 975 900 × 900 270 180 2300 24-φ23 φ1130 φ1074 φ1000 1130 × 1130 1074 × 1074 1000 × 1000 270 180 2550 24-φ23 Description (Notes) Ⅰ- handwheel Ⅱ- chain tread ground less than 1.7 m handwheel, more than 1.7 meters with a sprocket ⅠHand Wheel ⅡChain Wheel the hand wheel is used for less than 1.7m to the ground, and the chain wheel for above 1.7m