The characteristics of top mounted eccentric hemispherical valves are eccentric body, eccentric ball, and valve seat. When the valve stem rotates, it automatically aligns with the common path, ensuring tighter closure and excellent sealing performance. The ball completely disengages from the valve seat, eliminating wear issues related to the sealing ring and solving common valve seat and spherical sealing problems in traditional ball valves. Non metallic elastic materials are embedded in the metal seat to protect the metal surface. This product is particularly suitable for media such as steel, aluminum, fiber, small solid particles, pulp, fly ash, and petroleum gas.
● Top-Entry Design: This configuration allows direct access to internal components for maintenance, inspection, or replacement during system operation, eliminating the need to remove valves from the system.
● Gear Operation: Rotate it 90 degrees to achieve fast and accurate control response, making it an ideal choice for on-site adjustments.
● Eccentric Hemisphere: This feature facilitates 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 drive, forged steel structure, and top mounted ball valve design fully meet maintenance requirements. The top mounted structure and modular design facilitate maintenance and reduce downtime during inspections or repairs. This valve has dual block and release (DBB), self tilting seat, and fire integrity, ensuring reliable control and safe operation with each rotation. For teams that prioritize pipeline performance and practicality, this is an ideal choice.
