Closed Cylinder Sampler

In the petrochemical, natural gas processing, and fine chemical industries, the safe and leak-free sampling of high-pressure, toxic, harmful, flammable, explosive, or liquefied gas media is a core link to ensure process safety, product quality, and compliant transportation. The HCY Series Closed Cylinder Sampler developed by Hubei Wan'an Environmental Protection & Petrochemical Equipment Co., Ltd. is the ultimate solution specifically designed for such high-risk working conditions. Adopting high-strength seamless steel cylinders and fully closed-loop technology, it realizes direct sealed sampling of gases, liquefied gases, and volatile liquids under process pressure, completely solving the problems of leakage, pollution, and transportation in traditional sampling methods. It is a reliable choice for sampling, storage, and transportation of modern high-risk media.

Core Functions & Superior Performance

This product strictly complies with authoritative domestic and international standards such as SH/T0233 "Liquefied Petroleum Gas Sampling Method", ASTM D1265, ISO 4257, and TSG R0004 "Safety Technical Supervision Regulations for Fixed Pressure Vessels". Its core lies in constructing a closed circulation system with equal pressure to the process pipeline: the sample is directly filled into a specially made one-time spin-formed stainless steel sampling cylinder under process pressure, and the cylinder can be sealed immediately after sampling to form an independent closed sample container. During the entire operation process, the medium is completely in a closed system with no discharge of residual liquid or gas, fundamentally eliminating the risks of personnel poisoning, environmental pollution, and fire and explosion. The collected samples maintain the original pressure and composition with strong representativeness, providing a reliable guarantee for accurate laboratory analysis.

Key Customer Value

Intrinsic Safety & Absolute Sealing: The fully closed sampling loop and self-closing design of the cylinder ensure zero contact of operators with toxic and harmful media. The sampling cylinder is equipped with an explosion-proof pressure relief device to provide overpressure protection. The system meets the strictest environmental protection and safety specifications, completely avoiding unorganized emission of VOCs.
High-Pressure Adaptation & Sample Fidelity: The sampling cylinder adopts one-time spin-formed 316L stainless steel technology, with no welding defects and uniform wall thickness. The maximum working pressure can reach 20MPa (200 bar), and the working temperature range is wide (-60℃ to +80℃), which can directly seal samples under process pressure, perfectly maintaining the phase state and composition of gas or liquefied gas samples, and ensuring that the analysis data truly reflects the process state.
Convenient Transportation & Long-Term Storage: The sampled cylinder itself is a sturdy pressure vessel sample tank, which can be directly used for safe transportation and long-term storage, avoiding the risks of pollution, loss, or phase change caused by sample transfer. A variety of specifications (50ml to 2000ml) and accessories (reserved volume tube, pressure gauge, quick connector) are provided to meet different sampling volume and subsequent processing needs.
Flexible Adaptation to Harsh Working Conditions: The product series can cover a wide range of working conditions from negative pressure to high pressure and low temperature to high temperature. According to the medium characteristics, nitrogen purging system, pneumatic circulation pump (for negative pressure or low differential pressure), heat tracing or cooling system can be flexibly selected to cope with liquefied petroleum gas (LPG), liquefied natural gas (LNG), hydrogen sulfide (H₂S), various hydrocarbons, and special gases.
Durable Reliability & Easy Maintenance: The inner wall of the cylinder can be pickled and passivated, electrolytically polished, or sprayed with PTFE lining, providing excellent corrosion resistance and anti-adsorption properties, and facilitating cleaning. Valves and connectors adopt high-quality sealing, and key components can be replaced on-site, with low maintenance cost and long service life.

Typical Application Scenarios

Petrochemical Industry: Process sampling and factory inspection of high-pressure gases or liquefied gases such as liquefied petroleum gas (LPG), propylene, butadiene, and cracked gas.
Natural Gas Processing: Composition analysis and calorific value detection sampling of liquefied natural gas (LNG) and pipeline natural gas.
Special Gases: Safe sampling and monitoring of highly toxic and corrosive gases such as hydrogen sulfide (H₂S), chlorine, and ammonia.
Fine Chemicals & Pharmaceuticals: Sampling and quality control of high-purity, high-value reaction gases or solvents.
Any high-pressure gaseous or liquid medium sampling point that requires safe transportation of samples from the site to the laboratory or a third-party testing agency.

Our Commitment

Hubei Wan'an Environmental Protection & Petrochemical Equipment Co., Ltd. is an expert in the field of closed sampling and pressure vessel manufacturing, holding the Class A2 Pressure Vessel Manufacturing License and ASME "U" Stamp authorization. With a complete quality assurance system (ISO9001/14001/45001) and advanced production and testing equipment, we ensure that each sampler and cylinder is safe, reliable, and of excellent performance.

We provide:

Professional Engineering Selection: Recommend the best configuration plan according to your medium characteristics, pressure, temperature, and sampling requirements.
Customized Production: Manufacture according to your specified cylinder specifications, materials (S30408/S31603), inner wall treatment process, and functional modules.
Complete Compliant Delivery: Provide detailed product manuals, material reports, pressure test certificates, and operation guides.
Reliable Global Supply: Products are packaged in sturdy packaging that meets international transportation standards to ensure safe delivery to any project site around the world, and professional technical support is provided.

Safely encapsulate high-pressure and high-risk media in your palm. Choose Wan'an Closed Cylinder Sampler to provide solid guarantee for your process control, quality assurance, and compliant transportation with military-grade sealing safety and professional sampling accuracy.

Welcome to contact us for detailed technical parameters and project-specific quotations!

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