The top-mounted eccentric hemispherical valve utilizes an eccentric valve body, an eccentric ball, and a seat. As the stem rotates, it aligns automatically with the common path, ensuring a tighter closure and superior sealing performance. The ball is fully detached from the seat, which eliminates wear issues associated with seal rings and resolves the problems of seat and spherical surface seals found in traditional ball valves. Non-metallic elastic material is embedded in the metal seat, protecting the metal surface of the seat. 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 setup allows for direct access to internal components for maintenance, inspection, or replacement while the system is running, thereby eliminating the need to remove valves from the system.
● Gear Operation: A mere 90-degree rotation is necessary to achieve fast and accurate control response, making it the ideal choice for field adjustments.
● Eccentric Hemisphere: This feature enables flexible installation of actuators or transmissions 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 construction and top-mounted ball valve design fully accommodate maintenance needs. The top-mounted structure and modular design facilitate maintenance, thereby reducing downtime during inspection or repair. This valve features double block and bleed (DBB), self-tilting seats, and fire integrity, ensuring reliable control and safety with each rotation. It is an ideal choice for teams that prioritize pipeline performance and practicality.
