The main connection size Model Size (mm) inch DN LD D1 D2 b z-Φd H D0 Z41W-300Lb 1/2 "15 140 95 66.5 35 15 4-Φ15 155 120 3/4" 20 152 117 82.5 43 16 4- Φ19 160 120 1 "25 165 124 89 51 18 4-Φ19 200 140 11/4" 32 178 133 98.5 64 19 4-Φ19 250 160 11/2 "40 190 156 114.5 73 21 4-Φ22 290 180 2" 50 216 165 127 92 22 8-Φ19 330 220 21/2 "65 241 190 149 105 25 8-Φ22 385 250 3" 80 283 210 168.5 127 29 8-Φ22 410 280 4 "100 305 254 200 157 32 8-Φ22 480 300 5 "125 381 279 235 186 35 8-Φ22 630 350 6" 150 403 318 270 216 37 12-Φ22 690 350 8 "200 419 381 330 270 41 12-Φ25 830 450 10" 250 457 445 387.5 324 48 16-Φ29 1003 500 12 "300 502 521 451 381 51 16-Φ32 1137 600 14" 350 762 584 514.5 413 54 20-Φ32 1489 750 16 "400 838 648 571.5 470 57 20-Φ35 1581 800 18" 450 914 711 628.5 533 60 24 -Φ35 2017 850 20 "500 991 775 686 584 64 24-Φ35 2228 900 24" 600 1143 914 813 692 70 24-Φ41 2650 950 Z41W-600Lb 1/2 "15 165 95 66.5 35 15 4-Φ15 155 120 3 / 4 "20 190 118 82.5 43 16 4-Φ19 160 120 1" 25 216 124 89 51 18 4-Φ19 200 140 11/4 "32 229 133 98.5 64 21 4-Φ19 250 160 11/2" 40 241 156 114.5 73 23 4-Φ22 290 180 2 "50 292 165 127 92 26 8-Φ19 350 250 21/2" 65 330 190 149 105 29 8-Φ22 430 250 3 "80 356 210 168 127 32 8-Φ22 470 300 4" 100 432 273 216 157 38 8-Φ25 570 350 5 "125 508 330 266.5 186 45 8-Φ29 700 400 6" 150 559 356 292 216 48 12-Φ29 750 500 8 "200 660 419 349 270 56 12-Φ32 830 600 10 "250 787 508 432 324 64 16-Φ35 1210 650 12" 300 838 559 489 381 67 20-Φ35 1350 700 14 "350 889 603 527 413 70 20-Φ38 1600 750 16" 400 991 686 603 470 77 20-Φ41 1800 800 18 "450 1092 743 654 533 83 20-Φ44 2110 900 20" 500 1194 813 724 584 89 24-Φ44 2350 950 24 "600 1397 940 838 692 102 24-Φ52 2900 1000 2, [US] standard flange valve types - Riverstone valve according to the sealing surface configuration can be divided into wedge gate-type valve and parallel gate-type valve, wedge gate-type valve can be divided into: single-gate type, double plate and flexible gate type; parallel gate-type valve can divided into single-gate type and double plate. Divided by the threaded stem position can be divided into two clear shot valve gate and dark bar. When the valve is closed, the sealing surface can only rely on media pressure to seal, which rely on the sealing surface of the medium pressure to ram pressure to the other side of the seat to ensure the sealing surface, which is self-sealing. Most of the valve is sealed by force, that is, when the valve is closed, to rely on external pressure to force the gate valve to ensure the tightness of the sealing surface. Gate valve with the valve stem linear movement, called the lift rod valve (also called clear shot valve). Often movements are trapezoidal threaded rod through the top of the valve guides and valve nut on the rotary motion into linear motion, which is the operating torque thrust into action. Open the valve, when the gate valve lift height equal to the diameter of the 1: 1 times, the fluid channel is completely smooth, but at run time, this position is not monitored. Actual use, is the apex of the stem as a sign that the fixed position, as its fully open position. Temperature appears to consider locking phenomenon, usually open to the vertex position, and then rewind 1 / 2-1 circle, as the position of the valve fully open. Therefore, the fully open position of the valve, according to gate position (ie, travel> to determine. Stainless steel valve, forged steel valve, flange valve, flanged ball valve, gate valve, some two-piece ball valve, the stem nut is located at the gate on the handwheel drive stem rotation, leaving the gate upgrade, this valve is called the rotating rod valve or valve called the dark bar 3] [ANSI flange valve installation - Former Riverstone 1. Install the valve should be checked valve cavity and sealing surfaces and other parts, does not allow dirt or sand attached; 2. The joints bolts evenly tightened requirements; 3. Check the packing requirements of pressed parts, both to ensure the packing seal, but also to ensure the gate open and flexible; 4. User Before installing the valve, the valve must be calibrated model, connection size and attention to the medium flow, to ensure consistency with the requirements of the valve; 5. user when installing the valve, the valve must set aside the necessary drive space; 6. Drive wiring circuit diagram device shall be; 7. valve must be regularly maintained, not free collision and squeeze to affect a seal, ① American standard steel flange valve product name and model ② American Standard steel flange valve diameter. ③ American Standard steel flange valve with an attachment so that we can correct for your selection.