Cast Steel Material Flanged Swing Check Valve Size 3 Inch
Cast Steel Material, Size 3 Inch, Flanged End Swing Check Valve
Principle of action
The valve is composed of valve body, valve cover, valve disc, rocker and other parts. The valve disc can automatically prevent fluid backflow. The valve disc of the valve is opened under the action of fluid pressure, and the fluid flows from the inlet side to the outlet side. When the inlet pressure is lower than the outlet pressure, the valve disc automatically closes under the action of fluid pressure difference, its own gravity and other factors to prevent the medium from flowing back.
connecting measurement
| size | L | D | D1 | D2 | b-f | Z-Фd | H |
| 2＂ | 203 | 150 | 120.7 | 92．1 | 17.5-2 | 4-Ф19 | 150 |
| 2.5＂ | 216 | 180 | 139.7 | 105 | 20.7-2 | 4-Ф19 | 168 |
| 3＂ | 241 | 190 | 152.4 | 127 | 22.3-2 | 4-Ф19 | 179 |
| 4＂ | 292 | 230 | 190.5 | 157 | 22.3-2 | 8-Ф19 | 233 |
| 5＂ | 330 | 255 | 215.9 | 185.7 | 23-2 | 8-Ф22.2 | 253 |
| 6＂ | 356 | 280 | 241.3 | 216 | 23.9-2 | 8-Ф22.2 | 297 |
| 8＂ | 495 | 345 | 298.5 | 270 | 28-2 | 8-Ф22.2 | 334 |
| 10＂ | 622 | 405 | 362 | 323.8 | 28.6-2 | 12-Ф25.4 | 395 |
| 12＂ | 698 | 485 | 431.8 | 381 | 30.2-2 | 12-Ф25.4 | 451 |
Material of main parts
| part name | part material |
| body,bonnet,Bracket,rocker | ASTM A216 WCB |
| Cylindrical pin | ASTM A276 410 |
| Disc | ASTM A105/ASTM A216 WCB |
Possible faults and elimination methods
| Possible faults | Cause of failure | Elimination method |
| Leakage of flange sealing surface |
1. Bolts are not tightened. 2. The gasket is broken or failed. |
1. Tighten the bolts evenly and symmetrically. 2. Replace the gasket. |
| Leakage of sealing surface |
1. Dirt and other matters are mixed between the sealing surfaces. 2. The sealing surface is damaged. |
1 clean the sealing surface. 2. Trim the sealing surface or replace the parts. |
Adopted standard
Design and manufacture: API 594-2017 flange, lug, butt welding and butt welding check valves
·Structure length: API 594-2017 flange, lug, butt welding and butt welding check valves
·Connecting end: ASME b16.5-2017 valve structure length
·Inspection and test: API 598-2016 inspection and test of valves
·Pressure temperature rating: ASME B16.34 flanged threaded and welded valves
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