Overview

The DYP940F top-entry hemispherical valve is an electrically driven eccentric hemispherical valve that adopts a top mounted structure. Its core feature is that all internal components of the valve (valve core, valve seat, valve stem) can be assembled, inspected, and maintained through the opening above the valve body, without the need to remove the valve from the pipeline. The valve is opened and closed by driving the eccentric hemispherical valve core to rotate 90 degrees through an integrated electric actuator. The "F" in the model usually represents that the valve seat is made of soft sealing material (such as reinforced polytetrafluoroethylene PTFE). The top-down design greatly simplifies online maintenance, making it particularly suitable for harsh working conditions with limited space, high requirements for maintenance convenience, or no interruption of processes. It is a key equipment in the fields of petroleum, chemical, natural gas, and long-distance pipelines that pursues high reliability and low maintenance costs.

DYP940F Top-Entry Hemispherical Valve Product Diagram

Feature

1. Unique online maintenance capability: Thanks to the top mounted structure, when internal seals need to be repaired or replaced, all internal components can be removed from above by simply opening the pressure seal cover or maintenance cover on the top of the valve body, without cutting or disassembling the pipeline. This greatly reduces maintenance downtime, workload, and costs.

2. Eccentric structure and soft seal design: Adopting an eccentric valve stem design ensures that the valve core instantly disengages from the valve seat during opening and closing, achieving frictionless operation and reducing operating torque. When closed, self wedging force is generated with the help of eccentricity, combined with the "F" type soft valve seat, which can achieve bubble level sealing and zero leakage, suitable for clean or tightly sealed media.

3. Electric Drive and Intelligent Control: Equipped with an integrated intelligent electric actuator that can receive control signals such as 4-20mA, enabling remote control, precise proportional adjustment, or switch operation. The actuator usually integrates overload protection, stroke control, and fieldbus interface, making it easy to connect to DCS/PLC systems.

4. Excellent flow and self-cleaning performance: When the valve is fully opened, the hemispherical valve core completely separates from the flow channel, forming a straight flow channel with extremely low flow resistance. During the opening and closing process, the scraping effect of the valve core edge can effectively remove the attachments on the sealing surface and has a certain self-cleaning ability.

5. High reliability and safety: The upper structure adopts a pressure self sealing valve cover, and the higher the pressure, the more reliable the sealing. Valves are usually specially designed for fire safety, anti-static, and other aspects. The main sealing components are modularized for quick replacement, ensuring long-term stable operation of the system.