The characteristics of the top-mounted eccentric hemispherical valve lie in its eccentric body, eccentric ball, and seat. As the valve stem rotates, it automatically aligns with the common path, ensuring a tighter closure and superior sealing performance. The ball completely disengages from the seat, eliminating wear issues associated with seal rings and addressing common seat and spherical seal problems found in traditional ball valves. Non-metallic elastic materials are embedded in the metal seat, protecting the metal surface. This product is particularly suitable for media such as steel, aluminum, fibers, small solid particles, pulp, fly ash, and petroleum gases.
● Top Entry Design: This configuration allows direct access to internal components for maintenance, inspection, or replacement while the system is running, eliminating the need to remove valves from the system.
● Gear Operation: Just rotate 90 degrees to achieve fast and accurate control response, making it an ideal choice for field adjustment.
● Eccentric Hemisphere: This feature allows the actuator or transmission to be easily installed without the need for additional brackets.
| 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 |
| Nominal pressure | PN1.6~6.4MPa |
| Nominal diameter | 20~400mm |
| Appliable Temperature | Hard Seal:-40~300ºC |
| Soft Seal | -40~180ºC |
| Applicable medium | Water,gas,oil quality and so on |
| Driving Means | Manual ,Electric, Worm wheels |
| Body materials | WCB, CF8, CF8M, CF3M |
| Stem | 2Cr13, 304, 316 |
| Rotary angle | 90° |
| Valve Seat | PTFE, 0Crl, 7Ni4Cu4Nb |
| Core Material | CF8, CF8M, CF3M |
Q: What is the main advantage of a top-entry valve design?
A: The top-entry design allows for maintenance or part replacement without removing the valve from the pipeline—ideal for critical systems where downtime must be minimized.
Q: Is it compliant with any specific industry standards?
A: Yes, it follows API 6D/6A and ASME B16.10 design standards, including features like firesafe design, O-ring sealing, and DBB capability.
Our gear-driven, forged steel structure, and top-mounted ball valve design fully meet maintenance requirements. The top-mounted structure and modular design facilitate maintenance, reducing downtime during inspections or repairs. This valve features double block relief (DBB), self-aligning seats, and fire integrity, ensuring reliable control and safe operation with each rotation. It is an ideal choice for teams that prioritize pipeline performance and practicality.
