What is a top entry ball valve?
A top-entry ball valve is a flow-control valve featuring an integral body design that minimizes leakage points and enables online maintenance. With high-pressure manufacturing capabilities, it is widely used in water supply, petrochemical, power energy, and other industries.
Key Design Features
For DN100 and below:
Double-beveled seat design with spring-loaded self-compensation ensures sealing under low-to-medium pressure.
For DN100 and above:
Fixed ball structure for enhanced stability in high-pressure applications.
Functional Advantages
Double Block & Bleed (DBB):
Allows safe isolation and pressure release between dual seals.
Fire-Safe & Anti-Static:
Meets API 607/6FA fire safety standards and includes anti-static devices for hazardous environments.
Bidirectional Sealing:
Ensures tight shutoff in both flow directions.
Retractable Seat Technology:
Simplifies maintenance by allowing seat retraction without full valve disassembly.
Top-Entry Maintenance:
The removable bonnet permits in-line repair or part replacement without removing the valve from the pipeline.
Bottom-Entry Stem with Back-Seal:
The downward-installed stem features a back-sealing structure to ensure reliable packing seal integrity.
