What Is a Floating Flange?
Q41F flange floating ball valve, ball ball without fixed shaft, is called floating ball valve. There are two valve seat seals in the valve body of the floating ball valve. A ball is clamped between them. The ball has a through hole. The diameter of the through hole is equal to the inner diameter of the pipe. The inside diameter is called a reduced diameter ball valve.
Q41F flange floating ball valve
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Q41F flange floating ball valve, ball ball without fixed shaft, is called floating ball valve. There are two valve seat seals in the valve body of the floating ball valve. A ball is clamped between them. The ball has a through hole. The diameter of the through hole is equal to the inner diameter of the pipe. The inside diameter is called a reduced diameter ball valve.
- Chinese name
- Q41F flange floating ball valve
- Nature
- Ball valve without fixed shaft
- Design and manufacturing standards
- GB12235-89
- Structure length standard
- GB12221-89
Flange floating ball valve application specifications:
1.Design and manufacture GB12235-89
2.Structure length according to GB12221-89
3.Flange size according to JB / T79-94
4.Valve inspection and test according to APID.598
Structural characteristics and functions
1. A variety of valve seat structures with advanced sealing performance: ordinary valve seats and elastic valve seats can be designed according to different uses and requirements of users to ensure reliable sealing performance of the valve; long service life and reduced valve operating torque.
2. The operating position of the handle is the same as the opening and closing position of the valve: the correct installation position of the handle is that the handle is parallel to the channel, and the opening degree of the valve can be judged according to the position of the handle to prevent misoperation.
3. Locking device for fully open and fully closed position of the valve: To prevent misoperation of the open and close valves, lock holes are provided in the fully open and fully closed position. The valve position can be locked to prevent other people's misoperation, and valve position misoperation caused by vibration and other reasons to ensure the safety of the equipment.
4. Anti-flying structure of valve stem: The lower part of the valve stem is designed with a shoulder. When assembling, the valve stem is loaded from the inside of the valve body to prevent the valve stem from flying out due to high pressure in the valve. At the same time, it can also seal the valve stem and valve body after an accidental fire.
5. Anti-static function: When using in flammable media such as gasoline, natural gas, propane and other flammable media with low ignition point, consideration should be given to preventing static electricity in order to avoid the risk of damage between the ball and the PTFE valve seat Friction generates static electricity and explodes.
6. Fire protection structure: When an accidental fire occurs, the valve seat, packing,
Q41F Flange Floating Ball Valve Part Name and Material
Serial number NO | Part Name | Texture |
GB | ASTM |
1 | Valve body | WCB | A2116-WCB |
2 | Sealing ring | PTFE, RPP | PTFE, RPP |
3 | Sphere | 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 | filler | 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 | Valve stem | 1Cr33 | A276-410 |
14 | Screw | 35 | A193-B7 |
15 | Thrust washer | PTFE | PTFE |
Q41F flange floating ball valve test pressure
Pressure Level | Test pressure (MPa) |
Nominal pressure (PN) | Class | Shell test | Seal test |
1.0 | - | 1.5 | 1.1 |
1.6 | - | 2.5 | 1.76 |
2.5 | - | 3.8 | 2.75 |
4.0 | - | 6.0 | 4.4 |
6.4 | - | 9.6 | 7.04 |
- | 150 | 3.0 | 2.2 |
- | 300 | 7.6 | 5.6 |
- | 600 | 15.0 | 11.0 |
- | 10K | 2.4 | 1.5 |
- | 20K | 5.8 | 4.0 |
