Designed and manufactured in accordance with API American Petroleum Institute standards.
Basic structure form (butterfly plate axis and valve body/seat centerline coincidence)
a.DB71F46 fully lined type
The valve body is fully lined/the butterfly plate is fully lined/the butterfly plate and the butterfly plate shaft are integrated;
b.DB71F4 fully lined type
The valve body is fully lined/ butterfly plate is fully lined/ butterfly plate and disk shaft are combined and assembled;
c.DB71F/P half-lined type valve body fully lined / butterfly plate for stainless steel (not lined) butterfly plate and butterfly plate shaft assembly.
Design and Manufacturing | GB/T12238/API609(median line) |
Structure length | GB/T12221/API609(A |
Flange Size | HG/T20592/ASMEB 16.5 (NPS≤24 |
pressure test | GB/T13927/API598 |
symbolize | GB/T12220/MSS SP-25 |
fill | JB/T7928/API609 |
Nominal Pressure (lbs) ANSI150Lb
Nominal Diameter (inch) NPS 2~24
handlebar rotation | DB71F/P DB71PFA D871F4 Da71F46 | Half-lined Fully lined Fully lined Fully lined | worm-gear rotation | DB371F/P DB371PFA DB371F4 Da371F46 | half-lining Lined Fully lined Fully lined |
get angry | DB671F/P DB671PFA Dg671F4 Dg671F46 | Half-lined Fully lined Fully lined Fully lined | Electricity | De971F/P DB971PFA De971F De971F46 | Half-lined Fully lined Fully lined Fully lined |
serial number | Part Name | gray cast iron | carbon steel | stainless steels | Ultra-low carbon stainless steel | ||
Z | C | P | R | PL | RL | ||
1 | Upper and lower valve body | A126 C.135A | A216 WCB | A351 CF8 | A351 CF8M | A351 CF3 | A351 CF3M |
2 | butterfly plate | A216 WCB | A105 | A351 CF8 | A351 CF8M | A351 CF3 | A351 CF3M |
3 | Butterfly plate shaft | A182 F6 | A182 F6 | A182 F304 | A182 F316 | A182 F304L | A182 F316L |
4 | Lining/seat | PTEE(F4)PCTFE(F3)FEP(F46)PFA(Soluble polytetrafluoroethylene)PO(polyolefin) | |||||
5 | O-ring | FPM(fluoroelastomer) | FPM(Fluoroelastomer) | ||||
6 | pad | SiR(silicone rubber) | SiR(silicone rubber) | ||||
7 | Adjustable Positioning Seat | A182 F304 | A182 F304 | A182 F304 | A182 F304 | A182 F304L | A182 F316L |
8 | bolt (male component of nut and bolt) | A193 B7 | A193 B7 | A193 B8M | A193 B8M | A193 B8M | A193 B8M |
9 | nut (female component of nut and bolt) | A1942H | A1942H | A1948 | A1948 | A1948 | A1948 |
10 | video game controller | ZL101(Casting Aluminum Alloy) | |||||
Nominal diameter | standard value | reference point | |||||||||
DN (mm) | NPS (inch) | L | D | D1 | D2 | f | b | Z-Φd | Do | H | W(kg |
Class 150Lb | |||||||||||
50 | 2 | 43 | - | 120.7 | 92.1 | 3.5 | - | 4-Φ19 | 200 | 150 | 5 |
65 | 21/2 | 46 | - | 139.7 | 104.8 | 3.5 | - | 4-Φ19 | 250 | 160 | 7 |
80 | 3 | 46 | - | 152.4 | 127 | 3.5 | - | 4-Φ19 | 2580 | 170 | 10 |
100 | 4 | 52 | - | 190.5 | 157.2 | 3.5 | - | 8-Φ19 | 300 | 185 | 14 |
125 | 5 | 56 | - | 215.9 | 185.7 | 3.5 | - | 8-Φ22 | 300 | 210 | 22 |
150 | 6 | 56 | - | 241.3 | 215.9 | 4 | - | 8-Φ22 | 200* | 230 | 32 |
200 | 8 | 60 | - | 298.5 | 269.9 | 4 | - | 8-Φ22 | 240* | 285 | 66 |
250 | 10 | 68 | - | 362 | 323.8 | 4 | - | 12-Φ25 | 240* | 325 | 80 |
300 | 12 | 78 | - | 431.8 | 381 | 4.5 | - | 12-Φ25 | 280* | 360 | 94 |
350 | 14 | 78 | - | 476.3 | 412.8 | 4.5 | - | 12-Φ28.6 | 280* | 430 | 125 |
400 | 16 | 102 | - | 539.8 | 469.9 | 5 | - | 16-Φ28.6 | 320* | 475 | 150 |
450 | 18 | 114 | - | 577.9 | 533 | 5 | - | 16-Φ31.8 | 320* | 525 | 172 |
500 | 20 | 127 | - | 635 | 584 | 6 | - | 20-Φ31.8 | 360* | 565 | 225 |
600 | 24 | 154 | - | 749.3 | 692 | 6 | - | 20-Φ34.9 | 360* | 630 | 290 |
The flange size in the table is according to ASME B16.5 when NPS≤24, and according to ASME B16.47 when NPS>24.
Flange size D, D1, D2, Z-φd, f, d, the value is the standard flange size connected with the butterfly valve, the size code in the sketch is only part of it.
