SWAGELOK 304L-HDF4-300-T Double Ended Sample Cylinder Fnsp 300CC 1/8

( Brand: Swagelok ), ( Manufacturer Part Number: 304L-HDF4-300-T ), ( Part Type: Cylinder ), ( Country Of Origin: United States )

Review SWAGELOK Double Ended Sample Cylinder Fnsp 300cc Inch 1/8

The **Swagelok 304L-HDF4-300-T Double-Ended Sample Cylinder (FNSP, 300 cc, 1/8")** is a precision-engineered, high-performance gas sampling cylinder designed for demanding laboratory and industrial applications where reliability, durability, and leak-free performance are paramount. Constructed from **304L stainless steel**, this cylinder combines corrosion resistance with exceptional mechanical strength, making it ideal for handling aggressive chemicals, high-pressure gases, and corrosive environments without compromising integrity. The **304L grade** ensures superior resistance to oxidation, pitting, and stress corrosion cracking, while maintaining a clean, inert surface that minimizes contamination risks in sensitive analytical processes.

This double-ended sample cylinder features a **FNSP (Full-Nipple Sample Port)** design, which provides a robust, threaded connection for seamless integration with Swagelok s extensive line of fittings, valves, and tubing systems. The **1/8" (6 mm) nominal size** allows for precise flow control and compatibility with standard laboratory instrumentation, making it versatile for applications in gas chromatography (GC), mass spectrometry (MS), environmental monitoring, and process gas analysis. The **300 cc (0.3 liters) capacity** strikes an optimal balance between sample volume and portability, ensuring sufficient gas volume for accurate sampling while remaining compact enough for bench-top or field deployment.

One of the standout features of this cylinder is its **HDF4 (High-Density, Full-Flow) design**, which incorporates a **double-ended configuration** with two identical ports on opposite sides. This design eliminates dead volume and ensures minimal gas hold-up, maximizing sample purity and reducing contamination risks during transfer. The **full-flow capability** allows for rapid, efficient sampling without pressure drop, making it ideal for dynamic applications where speed and accuracy are critical. The cylinder s **threaded connections** (typically 1/8" Swagelok female) are precision-machined to exacting tolerances, ensuring a leak-tight seal when paired with compatible ferrules, nuts, and valves, such as the Swagelok SS-400 series.

The **304L-HDF4-300-T** is built to withstand pressures up to **300 bar (4,350 psi)**, making it suitable for high-pressure gas sampling applications, including those involving compressed gases like hydrogen, helium, nitrogen, or specialty gases used in semiconductor manufacturing, petrochemical analysis, or environmental testing. Its **tempered stainless steel construction** also provides excellent thermal stability, ensuring consistent performance across a wide temperature range, from cryogenic applications to elevated temperatures.

Beyond its technical specifications, this cylinder exemplifies Swagelok s commitment to **modularity and adaptability**. Its compatibility with the Swagelok fitting system allows for easy customization with additional components such as **sample valves, pressure gauges, or gas cylinders**, enabling users to assemble tailored sampling systems for specific workflows. The **double-ended design** further enhances flexibility, as it can be integrated into existing piping systems or used as a standalone unit with minimal setup.

For laboratories and industries where precision and reliability are non-negotiable, the **Swagelok 304L-HDF4-300-T Double-Ended Sample Cylinder** represents a benchmark in gas sampling technology. Its combination of **corrosion-resistant materials, high-pressure capability, and full-flow efficiency** ensures accurate, repeatable results while minimizing maintenance and downtime. Whether used for routine quality control, advanced materials research, or critical process monitoring, this cylinder delivers the performance and durability required to meet the most exacting standards in gas analysis.

### **Pros and Cons of buying a Swagelok 304L-HDF4-300-T Double-Ended Sample Cylinder (FNSP 300cc, 1/8")**

1. **High-Purity Material (304L Stainless Steel)** The 304L grade is corrosion-resistant and suitable for many chemical applications, ensuring longevity and reliability in clean environments.

2. **Double-Ended Design** Allows for flexible connection options, making it versatile for different experimental setups without requiring additional adapters.

3. **High-Pressure Capability (3000 PSI)** The "300" designation indicates it is rated for high-pressure applications, making it suitable for demanding lab or industrial processes.

4. **Small Volume (300cc)** Ideal for precise sampling, small-scale experiments, or applications where minimal gas/liquid volume is required.

5. **Standardized Threading (1/8")** Compatible with a wide range of Swagelok fittings, reducing the need for custom adapters and ensuring easy integration into existing systems.

6. **Durable Construction** Swagelok components are known for their robust build quality, reducing the risk of leaks or failures over time.

7. **Compatibility with HDF4 Fittings** The "HDF4" designation suggests it uses Swagelok s high-performance ferrule design, which provides a secure seal and reliable performance.

8. **Commonly Available Replacement Parts** Since Swagelok is a widely used brand, finding spare ferrules, seals, or gaskets is straightforward if maintenance is needed.

9. **Cleaning and Sterilization-Friendly** Stainless steel is easy to clean and sterilize, making it suitable for applications requiring high hygiene standards (e.g., pharmaceutical, food-grade testing).

10. **Long-Term Cost Efficiency** While the upfront cost may be higher than some alternatives, its durability and reliability can reduce long-term maintenance expenses.

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1. **Higher Initial Cost** Compared to generic or non-branded cylinders, Swagelok components are more expensive, which may be a barrier for budget-conscious buyers.

2. **Specialized Tools Required** Swagelok fittings typically require a wrench (often a 1/4" drive) and proper torque settings for installation, which may not be available in all labs.

3. **Limited Color Coding** Unlike some other brands, Swagelok does not always use color-coded ferrules for quick identification of materials (e.g., copper vs. stainless steel), which could lead to confusion during assembly.

4. **Potential for Overkill in Low-Pressure Applications** If the cylinder is only used for low-pressure or non-critical applications, the high-pressure rating may be unnecessary, increasing costs without added benefit.

5. **Learning Curve for Non-Experienced Users** Improper installation (e.g., overtightening, incorrect ferrule placement) can lead to leaks or damage, requiring training or supervision for first-time users.

6. **Weight and Bulk** While not excessively heavy, the stainless steel construction makes it heavier than plastic or aluminum alternatives, which may be a consideration for portable setups.

7. **Compatibility Issues with Non-Swagelok Systems** If the system uses non-Swagelok fittings (e.g., NPT, BSP), additional adapters may be needed, adding complexity and cost.

8. **Environmental Considerations** Stainless steel is not biodegradable, which may be a concern for labs aiming for sustainability or those disposing of components frequently.

9. **Potential for Counterfeit Products** Cheaper knockoffs of Swagelok parts exist, which may fail prematurely or leak. Ensuring authenticity requires purchasing from authorized distributors.

10. **Maintenance Dependency** While durable, Swagelok components require periodic inspection of ferrules, seals, and threads to prevent leaks, adding minor ongoing maintenance effort.

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The **Swagelok 304L-HDF4-300-T double-ended sample cylinder** is a high-quality, versatile, and reliable choice for applications requiring precision, high pressure, and corrosion resistance. Its stainless steel construction, standardized threading, and compatibility with a wide range of fittings make it a strong investment for labs, industrial processes, or research settings where performance and longevity are critical. However, its higher cost, specialized installation requirements, and potential over-specification for low-pressure uses may not justify the purchase for casual or budget-limited users.

- You need a durable, high-pressure cylinder for critical applications (e.g., gas sampling, chemical processing, or high-precision lab work).

- Your system already uses Swagelok fittings, ensuring seamless integration.

- You prioritize long-term reliability and can justify the upfront cost.

- The 300cc volume and 1/8" threading align with your experimental needs.

- Your application involves very low pressures or non-corrosive fluids, where a cheaper, simpler cylinder (e.g., plastic or aluminum) would suffice.

- You lack the tools or expertise to properly install and maintain Swagelok fittings.

- Budget constraints make the higher cost prohibitive, and you can find a similarly rated generic cylinder at a lower price.

- Your system uses non-Swagelok fittings, and adapters would be required, increasing complexity.

For most professional or high-stakes applications, the **Swagelok cylinder is a worthwhile investment**. For casual or low-demand uses, evaluating cheaper alternatives may be more practical. Always verify compatibility with your existing system and ensure proper installation to maximize its performance.

Details:

FNPT, 300 cm3, 1800 pig 124 bar, Internal PTFE Coating, Manufactured by SWAGELOK Manufacturer Part Number: 304L-HDF4-300-T, Swagelok pliant Sample Cylinder Configuration: Double Ended Port Size: 1/4 NPT Ports Body Material: 304L Stainless Steel Testing: DOT-3E Volume: 300cm DOT-Compliant Cylinder, in.

part #: 304lhdf4300 prices

• $110.00-$159.00

specifications valvesplumbing:

• brand: Swagelok
• mpn: 304l-hdf4-300-t
• part type: Cylinder
• country of origin: United States

offer valvesplumbing:

• started: April 25, 2026
• options: Ship-to-home
• sold: 0
• quantity: 4
• availability: In Stock
• best offers: True

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• policy: No Returns

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• # reviews: 220
• rating: 100.0%
• city: Houston, Texas

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• service: USPS Ground Advantage
• cost: $14.00
• transit: 5-11 Days
• carrier: USPS
• type: Calculated
• class: Standard

general valvesplumbing:

• condition: Used
• Hydraulics, Pneumatics, Pumps Plumbing > Valves Manifolds > Air Control Valves

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