The ZJHPF pneumatic diaphragm fluorine-lined bellows sealed control valve is a precision process control unit integrating a high-performance pneumatic actuator, an overall fluorine-lined body, and bellows sealing technology. This valve is specifically designed for handling highly corrosive, toxic, volatile, and permeable media. All internal wetted surfaces and components are lined with fluoroplastics (e.g., FEP/F46 or PFA), effectively isolating the metal substrate from erosion. The stem seal utilizes a double-barrier structure combining a bellows seal with auxiliary packing, ensuring absolute zero leakage at the stem movement point. The ZJHPF is widely utilized in petrochemical, fine chemical, chlor-alkali, and pharmaceutical industries where environmental safety and corrosion resistance are paramount.

Product Image of ZJHPF Pneumatic Fluorine-lined Bellows Sealed Control Valve

Feature

1.Superior comprehensive corrosion resistance:All internal surfaces, including the body cavity, plug, seat, and stem wetted parts, are integrally molded with fluoroplastics. This material offers exceptional chemical inertness against almost all strong acids, alkalis, and oxidants.
2.Zero-leakage double sealing structure:High-performance bellows serve as the primary stem seal, creating an airtight barrier to eliminate media permeation. Secondary packing seal acts as a safety fallback, ensuring intrinsic safety under extreme conditions.
3.Precision pneumatic actuator:Equipped with a compact multi-spring pneumatic diaphragm actuator, providing low height, light weight, and high output thrust. Paired with an intelligent positioner, it achieves high adjustment precision and rapid response.
4.Optimized low-flow resistance path:The smooth internal flow path with a large effective area significantly reduces pressure drop. The single-seat design combined with precision-ground surfaces ensures bubble-tight shut-off performance.
5.Excellent negative pressure and temperature resistance:Advanced molding ensures the lining is tightly bonded to the metal wall, preventing lining peeling or collapse under vacuum or pressure fluctuations, adapting to various thermal cycles.
6.Intrinsically safe attributes:Driven by compressed air without electrical signals in hazardous zones, offering natural safety. Available in air-to-open or air-to-close modes to ensure system safety during air supply failure.
7.Lightweight and space-saving solution:The compact design reduces overall volume by approximately 30% compared to traditional lined valves, significantly lightening the pipeline load and facilitating flexible layout in modular skids.
8.Convenient modular maintenance:The actuator-to-body connection is scientifically designed. Key wearing parts like the lined plug, bellows assembly, and seals are modular for easy online replacement without removing the valve from the line.