Technical Specifications Instrument air supply pressure ranges from 1.4 bar to 7 bar. High‑flow pneumatic output capacity. Operating temperature ‑40 ℃ to +85 ℃, storage temperature ‑40 ℃ to +85 ℃. Weight approximately 0.29 kilogram.
Functional Features Amplifies pneumatic control signal flow rate. Provides large‑flow air output for large‑volume actuators. Accelerates valve opening and closing motion. Built‑in filter element blocks impurities in instrument air. Maintains stable proportional pressure output characteristic.
Application Scenarios Matching spare‑part for ABB intelligent valve positioners. Deployed in petrochemical, chemical and power industry process loops equipped with large‑bore pneumatic control valves.
Performance Parameters Superior gas flow amplification performance. Fast pneumatic response reduces valve stroke execution time. Stable output pressure under varying load conditions.
Material Composition High‑strength die‑cast aluminum alloy main body. Precision pneumatic valve components, wear‑resistant rubber sealing assemblies, integrated filter element.
Structural Characteristics Compact block‑type modular structure. Equipped with pneumatic input port, air supply port and high‑flow output port. Reserved mechanical fixing holes for internal installation.
Working Principle Low‑flow pneumatic control signal enters VBX01TA. Internal amplifier structure regulates instrument air passage. High‑flow proportional pneumatic pressure is generated and transmitted to pneumatic actuator to push fast valve stem movement.
Installation Requirements Cut off instrument air supply before replacement. Mount VBX01TA at designated position inside positioner and tighten fixing screws. Inspect sealing condition of all pneumatic interfaces. Restore instrument air supply. Complete automatic positioner calibration after assembly.
Usage Notes Instrument air supply shall remain clean, dry and oil‑free. Avoid mechanical impact on precision internal pneumatic parts. Perform auto‑calibration after every component replacement. Check sealing surface status during regular maintenance.
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