Manually square flapper valve flapper valve, also known as a square, compact design, the work is sensitive, light weight, no obstruction, closed fast, especially in a variety of non-standard viscosity solids, less than Φ 10mm powder and pellets, grain feed transportation and traffic conditioning, assembling without angle constraints, work convenient, ready to recuperate opening. the valve hand wheel and sprocket has dominated work in two ways, as a hand wheel type I, II for the sprocket. unidirectional and bidirectional two designs, LZD is unidirectional, LZS is bi-directional. manually square flapper valve selection parameter model (Model) ABCH Open (Open) OFF (Close) Operating temperature (Work temperature) N-φ nominal pressure (mpa) ( Nominal pressure) 200 type 290 250 200 170 950 750 ≤ 300 ℃ φ13 × 8 0.6 220 type 310 270 220 170 1010 790 φ13 × 8 240 type 330 290 240 170 1070 830 φ15 × 8 260 type 350 310 260 170 1130 870 φ15 × 8280 Type 380 330 280 170 1190 910 φ17 × 8 300 type 400 350 300 170 1250 950 φ17 × 8 320 type 420 370 320 170 1310 990 φ17 × 8 340 type 440 390 340 170 1370 1030 φ17 × 8 400 type 500 450 400 170 1480 1080 φ17 × 8 440 type 540 490 440 200 1600 1160 φ17 × 8 500 type 660 610 500 200 1850 1350 φ17 × 16 600 type 730 680 600 250 2350 1750 φ17 × 16 specific parameters concern http://www.nhxlq . com for details Novo Environmental Protection Equipment Co., Ltd. Mobile: 15369805911 Tel 0317 -8229511 Fax :0317-8315251 qq: 2680390260 Contact: Hu Dong months Website: Please explain http://www.nhxlq.com contact us when you are in " "The investigation information