Product Introduction
Needle Valve
In high-demand fields such as petrochemicals, precision instruments, scientific research experiments, and gas analysis, the fine and stable regulation and reliable shutoff of fluid flow are crucial to ensuring process accuracy, equipment safety, and data accuracy. The high-performance AN series needle valves provided by Hubei Wan'an Environmental Protection & Petrochemical Equipment Co., Ltd. are precision control solutions designed specifically for such harsh demands. As core regulating components in sampling systems, instrument pipelines, and laboratory equipment, they have become the industry benchmark for achieving precise flow control and reliable shutoff with their excellent fine-tuning performance, compact and sturdy structure, and ultra-high sealing grade.
Core Functions & Superior Performance
This series of needle valves adopts a classic matching structure of conical needle-shaped valve core and valve seat, driving the valve stem through multi-turn fine-thread threads to achieve precise and linear adjustment of the valve port opening. Its long-stroke design ensures extremely high resolution and stability of flow control during the process from fully open to fully closed. The valve stem seal adopts multiple packing (such as PTFE, graphite) or O-rings, combined with precision mechanical processing, which provides a smooth operating feel while achieving ultra-low leakage at the valve stem. The product offers two flow forms: straight-through and angle type, meeting different pipeline layout needs.
Key Customer Value
- Precise Regulation & Stable Control: The fine thread transmission and conical valve core design enable the valve to achieve extremely precise flow fine-tuning, making it particularly suitable for occasions requiring stable and small flow control, such as chromatograph sampling, pressure instrument isolation, and sampling loop purging.
- Ultra-High Pressure Sealing & Reliable Shutoff: The line-seal cooperation between the valve core and valve seat forms a tight metal-to-metal or metal-to-polymer seal when closed, providing excellent shutoff sealing performance. The product has a wide operating pressure range, with standard models up to 3000 psig (20.7 MPa), and high-pressure models even up to 5000-10000 psig (34.5-69 MPa), meeting the harsh requirements of systems from atmospheric pressure to ultra-high pressure.
- Compact & Sturdy, Adapt to Harsh Environments: Adopting 316 stainless steel as the main material, the structure is compact and sturdy. The protective handle design can effectively prevent dirt from entering the functional part of the valve stem. The operating temperature range is wide, from -53°C to 121°C (standard O-ring) and even up to -17°C to 450°C (special design), which can adapt to various environments from low-temperature experiments to high-temperature processes.
- Flexible Connection & Wide Adaptability: A variety of end connection options are provided, including female NPT, male NPT, imperial/metric ferrule fittings, and mixed connection methods. The path size ranges from 0.093 to 0.218 inches (2.4 to 5.6 millimeters), and the flow coefficient (Cv) is 0.12 to 0.53, which can be easily integrated into pipelines and equipment of various sizes.
- Durable & Easy Maintenance: The all-metal structure is corrosion-resistant and wear-resistant, with a long service life. The design focuses on reliability and can maintain stable performance under long-term frequent adjustment.
Typical Application Scenarios
- Closed Sampling Systems: As the inlet and outlet control valve of sampling cylinders and the regulating valve of purging loops, it realizes safe and precise medium control.
- Instrument & Control Systems: Used for isolation, exhaust, and fine pressure regulation of instruments such as pressure gauges, transmitters, and analyzers.
- Laboratory & Analytical Equipment: Provide precise fluid or gas flow control for gas/liquid chromatography, reaction kettles, and test benches.
- Process Pipelines: Used for small-flow process fluid pipelines that require fine adjustment, or as discharge valves and sampling valves for high-pressure systems.
Our Commitment
Hubei Wan'an Environmental Protection & Petrochemical Equipment Co., Ltd. is a professional manufacturer of industrial valves and sampling equipment, with a complete quality system and production testing capabilities. We ensure that each needle valve has passed strict inspection and has reliable performance.
We provide:
- Professional Selection Support: Recommend the best model according to your medium, pressure, temperature, and adjustment accuracy requirements.
- Customized Services: Manufacture according to your specified materials, pressure ratings, connection methods, and special requirements.
- Complete Technical Delivery: Provide detailed product manuals, performance parameters, and installation guides.
- Reliable Global Supply: Products are packaged in standard export packaging to ensure safe delivery to all parts of the world.
Control every change of fluid with precision between millimeters. Choose Wan'an high-performance needle valves to provide precise control and safety guarantee for your key processes with excellent regulating performance and reliable sealing.
Welcome to contact us for detailed product catalogs and technical parameters!
