| Media: | Gas, Water, Steam |
|---|---|
| Material: | Ss,Carbon Steel |
| Connection Form: | Double Flange |
| Driving Mode: | Electric, Manual |
| Nominal Pressure: | PN1.0-32.0MPa |
| Channel: | Straight Through Type |
| Samples: |
|---|
| Customization: |
|---|
Suppliers with verified business licenses
The eccentric semi-ball valve is a relatively new type of ball valve. It has some advantages unique to its own structure, such as no friction in the switch, the seal is not easy to wear, and the opening and closing torque is small. This allows the size of the actuator to be used reduced. Equipped with a multi-turn electric actuator, the medium can be adjusted and tightly cut off. It is widely used in petroleum, chemical industry, urban water supply and drainage and other working conditions that require strict cutting.
Eccentric semi-ball valve has cutting function,
1. The eccentric semi-ball valve is composed of main components such as a valve body, an eccentric shaft, a valve cover, a ball crown, a sleeve, and a valve seat. The valve is opened and closed by rotating the eccentric shaft 90° to cut off the medium.
2. The eccentric semi-ball valve ensures that there is no friction between the valve seat and the spherical crown during the opening or closing process of the valve. The eccentric semi-ball valve uses an eccentric crankshaft to deviate from the center line of the spherical crown and the center line of the valve flow channel by an eccentric distance. When the valve is opened, the crankshaft rotates through a small angle, and the ball crown will leave the valve seat, and the ball crown and the valve seat will no longer be in contact; conversely, during the valve closing process, only at the closing moment, the ball crown will be in contact with the valve seat. touch.
3. The eccentric semi-ball valve adopts a top-mounted structure. During the maintenance process, there is no need to disassemble it from the pipeline. You only need to remove the bolts on the valve cover and remove the valve cover, so that the eccentric shaft can be taken out. This ensures that the valve can be online repair.
4. The eccentric semi-ball valve should ensure that the flow channel is completely unobstructed when it is opened, and the water head loss is small during operation. The ball adopts a semicircular channel, which has good flow performance and linear adjustment performance, and impurities will not be deposited in the middle cavity of the valve body.
5. The eccentric semi-ball valve should have sufficient strength. The eccentric crankshaft adopts a fixed ball structure without any vibration at high flow rates. The shell test is performed in accordance with the national standard GB13927-1992.
6. No external leakage is allowed in the eccentric semi-ball valve, and the upper and lower shaft ends should be sealed with at least two O-ring seals.
7. The eccentric semi-ball valve has a cutting function, which can cut off debris (branches, textile bags, etc.) in the medium when closing to ensure the normal opening and closing of the valve.
More pictures in the entry album
1. The fluid resistance is small, and its resistance coefficient is equal to that of a pipe section of the same length.
2. It has simple structure, small size and light weight.
3. The eccentric semi-ball valve has a top-mounted structure. Valves installed on pipelines can be directly inspected and repaired online, which can effectively reduce device shutdowns and reduce costs.
4. The eccentric semi-ball valve is a single valve seat design. It eliminates the problem of abnormal pressure increase of the medium in the valve cavity that affects the safety of use.
5. Low torque design. The specially designed valve stem only needs a small handle to open and close the valve easily.
6. No friction in opening and closing. This function completely solves the problem of traditional [wiki]valve[/wiki] affecting the sealing due to mutual friction between the sealing surfaces.
7. Wedge sealing structure. The valve relies on the mechanical force provided by the valve stem to press the ball wedge onto the valve seat to seal, so that the sealing performance of the valve is not affected by changes in pipeline pressure difference, and the sealing performance is reliably guaranteed under various working conditions.
8. Self-cleaning structure of the eccentric semi-ball valve sealing surface. When the ball tilts away from the valve seat, the fluid in the pipeline passes 360° evenly along the ball sealing surface, which not only eliminates the local erosion of the valve seat by the high-speed fluid, but also washes away the accumulation on the sealing surface, achieving the purpose of self-cleaning. .
The valve chain is rotated to open or block the valve. Ball valves are easy to switch, small in size, can be made into large diameters, have reliable sealing, simple structure, and easy maintenance. The sealing surface and spherical surface are always in a closed state and are not easily eroded by the medium. They are widely used in various industries.
| Item | Part. Name | Material |
| 1 | Bonnet | PE |
| 2 | Extension pipe | st37 |
| 3 | Body | st37 |
| 4 | Flat washer | st37 |
| 5 | Butterfly Spring | 60Si2MnA |
| 6 | Ball seat | SS202 |
| 7 | O-ring | EPDM |
| 8 | Ball washer | PTFE+20%C |
| 9 | Ball | SS304 |
| 10 | Stem washer | PTFE+20%C |
| 11 | Stem sleeve | st37 |
| 12 | Stem | SS410 |
| 13 | Stem ring | PTFE+20%C |
| 14 | Stem O-ring | FPM |
| 15 | Sleeve | st37 |
| 16 | Positioning PIN | ASTM1035 |
| 17 | Handle | st37 |
| 18 | Washer | Q235A |
| 19 | Nut | Q235A |
| 20 | Handle cap | ABS |
| Type | Nominal pressure(MPa) | Testing pressure | Suitable temperature(°C) | Suitable medium | |
| Strength (water) (MPa) | Enclose (Water) (MPa) | ||||
| Q41 /61 H-16C | 1.6 | 2.4 | 1.76 | -40~200ºC | Water,Vapour,Oil |
| Q41 /61 H-25C | 2.5 | 3.75 | 2.5 | ||
Suppliers with verified business licenses
){kind=link}
){kind=link}