gb standard floating ball valve
technical parameter
item model number: q41f
nominal diameter: dn15~500mm
nominal pressure: pn1.6~10.0mpa
working temperature: -196~150℃
main material: wcb, a216-wcb，cf8,304
product description
floating ball valve is an important valve type, which is widely used in petrochemical, long-distance pipeline and other fields. the closing part of the floating ball valve is a ball (or part of the ball) with a hole, and the ball rotates with the valve stem to realize the opening or closing of the valve.
among various valves, the ball valve has the smallest flow resistance. when the full-diameter ball valve is opened, the diameter of the ball channel, the valve body channel and the connecting pipe are equal to one diameter, and the medium can flow almost without loss.
the floating ball valve can be fully closed and fully opened by rotating 90°, opening and closing quickly. compared with the gate valve and globe valve of the same specification, the ball valve is small in size and light in weight, which is convenient for pipeline installation.
main part material
| no. | part name | material | |
| gb | astm | ||
| 1 | body | wcb,cf8,304 | a2116-wcb |
| 2 | sealing ring | ptfe | ptfe |
| 3 | ball | 1c18ni9ti | ss304 |
| 4 | nut | 35 | a194-2h |
| 5 | stud | 35crmoa | a193-b7 |
| 6 | stone body | wcb | a216-wcb |
| 7 | gasket | flexible graphite stainless steel | b12.10-304f/.g |
| 8 | packing | ptfe | ptfe |
| 9 | packing gland | wcb | a2116-wcb |
| 10 | positioning pieces | 25 | a105 |
| 11 | retaining ring | 65mn | aisi 1066 |
| 12 | handle | k33 | a47-667/gr.32510 |
| 13 | stem | 1cr33 | a276-410 |
| 14 | screw | 35 | a193-b7 |
| 15 | thrust washer | ptfe | ptfe |
specifications
| design basis | gb series | american standard series | |
| design standards | gb/t12237 | ap16d | ansi b16.34 |
| flange connection structure length | gb/t12221 | ap16d | ansi b16.10 |
| structural length (welded) | gb/t15188.1 | ap16d | ansi b16.10 |
| connecting flange | gb/t9113 jb/t79 hg20592 | ansi b16.5、b16.47 | |
| butt welding end | gb/t12224 | ansi b16.25 | |
| test and inspection | gb/t9092 | ap16d | ap1598 |
main external connection dimensions
| dn | 15 | 20 | 25 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 |
| d1 | 13 | 19 | 25 | 38 | 64 | 64 | 76 | 102 | 127 | 152 | 203 |
| l | 108 | 117 | 127 | 165 | 191 | 191 | 203 | 229 | 356 | 394 | 457 |
| h | 59 | 63 | 75 | 95 | 142 | 142 | 152 | 178 | 252 | 272 | 342 |
| w | 130 | 130 | 160 | 230 | 400 | 400 | 400 | 650 | 1050 | 1050 | 1410 |
| wt（kg） | 2.5 | 3 | 5 | 7 | 15 | 19 | 19 | 33 | 58 | 93 | 160 |