SWAGELOK B-1RS4 Needle Valve 3000 100F 031946001

( Brand: Swagelok ), ( Manufacturer Part Number: B-1RS4 ), ( Part Type: Valve ), ( Body Material: Brass ), ( Country Of Origin: United States )

Review SWAGELOK Brass Needle Valve 3000 Psig At B1rs4

The **Swagelok B-1RS4 Needle Valve (Part Number 031946001)** is a precision-engineered, high-performance flow control device designed for demanding applications in industrial, laboratory, and process engineering environments. Part of Swagelok s renowned B-series needle valve line, this model combines robust construction with fine-tunable flow regulation, making it ideal for systems requiring precise metering of gases, liquids, or corrosive media. The valve features a **3000 series stainless steel body (316L)**, ensuring exceptional resistance to corrosion, oxidation, and high-temperature exposure, while its **100 series (1/8" NPT) male threaded connections** provide a standardized interface for seamless integration into existing piping systems. The **RS4 designation** indicates a **right-hand, screw-in design with a 4-way port configuration**, allowing for versatile installation in both straight-through and T-port applications, depending on the orientation of the valve body.

At the heart of the B-1RS4 is its **precision-ground needle and seat assembly**, which delivers smooth, leak-tight operation with minimal pressure drop, even at low flow rates. The valve s **handwheel-driven stem mechanism** ensures tactile feedback for accurate flow adjustment, while the **metal-to-metal sealing interface** between the needle and seat eliminates the risk of leakage or contamination from elastomeric components. This design is particularly advantageous in applications involving clean gases, such as semiconductor manufacturing, pharmaceutical processing, or analytical instrumentation, where purity and reliability are critical. The valve s **full porting** allows for maximum flow capacity when fully open, reducing turbulence and extending the lifespan of the system components.

Constructed from **316L stainless steel**, the B-1RS4 is engineered to withstand pressures up to **6,000 psi (414 bar)** and temperatures ranging from **-320 F to 400 F (-196 C to 204 C)**, making it suitable for extreme environments, including cryogenic applications, high-pressure testing, and aggressive chemical handling. The valve s **smooth, polished interior surfaces** minimize particulate buildup and ensure consistent performance over prolonged use, while its **right-hand thread orientation** simplifies installation and maintenance in confined spaces. Additionally, the **Swagelok-compatible design** allows for easy integration with other components in the company s extensive line of fittings, tubing, and instrumentation, facilitating a cohesive and leak-free system.

Beyond its technical specifications, the B-1RS4 exemplifies Swagelok s commitment to **durability, precision, and reliability**, making it a trusted choice for engineers and technicians in industries where flow control must be both precise and dependable. Whether used in **research laboratories, industrial gas delivery systems, or high-pressure testing rigs**, this needle valve delivers consistent performance with minimal maintenance, ensuring optimal operation for years to come. Its combination of **corrosion resistance, high-pressure capability, and fine-tunable flow control** makes it an indispensable tool for applications where accuracy and durability are non-negotiable.

### **Pros and Cons of buying a Swagelok B-1RS4 Needle Valve (Part #031946001, 3000 PSI, 100 F)**

1. **High-Pressure Rating (3000 PSI)** Suitable for demanding industrial, laboratory, or high-pressure gas applications, including compressed air, nitrogen, or specialty gases.

2. **Corrosion-Resistant Construction** Made from **316 stainless steel**, which resists corrosion from chemicals, moisture, and oxidation, extending the valve s lifespan in harsh environments.

3. **Precision Control** Needle valves provide fine adjustment of flow rates, making them ideal for applications requiring exact gas or liquid regulation (e.g., chromatography, calibration, or pilot systems).

4. **Standardized Swagelok Compatibility** Fits seamlessly into existing Swagelok systems, ensuring compatibility with tubing, fittings, and other components in the same series.

5. **Durable Seating Mechanism** The **Teflon -coated seat** reduces wear and friction, improving longevity and preventing leakage over time.

6. **Versatile Temperature Rating (100 F)** While the 100 F rating may seem limiting, this valve is typically used in moderate-temperature applications. For higher temps, Swagelok offers reinforced variants (e.g., B-1RS4 with higher temp ratings).

7. **Easy Maintenance** The design allows for straightforward disassembly and cleaning, reducing downtime for servicing.

8. **Reliable Brand Reputation** Swagelok is a trusted name in industrial fluid handling, known for quality, precision, and long-term performance.

9. **Available Spare Parts** Since Swagelok is widely used, replacement seals, O-rings, and gaskets are readily available.

10. **Threaded Connections (NPT or Metric)** The **1/4" NPT** (or other sizes) ensures compatibility with standard piping systems.

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1. **Limited Temperature Rating (100 F)** Not suitable for high-temperature applications (e.g., steam, molten metals, or extreme heat). For higher temps, consider a **B-1RS4 with a higher temperature rating** (e.g., -40 F to 400 F models).

2. **Potential for Leakage Over Time** Like all needle valves, Teflon seats can wear out with prolonged use, especially if the valve is frequently opened/closed or exposed to abrasive particles.

3. **Higher Upfront Cost** Compared to generic or non-branded needle valves, Swagelok parts are premium-priced, which may be a drawback for budget-conscious buyers.

4. **Not Ideal for High-Flow Applications** Needle valves are designed for **fine control**, not high-volume flow. For large flow rates, a globe or ball valve may be more efficient.

5. **Requires Proper Installation** Misalignment or overtightening can damage the seat or threads, leading to leaks or failure. Proper torque and sealing techniques are essential.

6. **Limited Size Options** The **1/4" NPT** size may be too small for some industrial applications requiring larger flow paths.

7. **Maintenance Dependency** Regular inspection and lubrication (if required) are necessary to prevent sticking or corrosion, adding to long-term operational costs.

8. **Potential for Contamination Risk** If not properly cleaned before installation, debris can enter the system, affecting performance.

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The **Swagelok B-1RS4 (031946001, 3000 PSI, 100 F)** is a **high-quality, precision-engineered valve** ideal for **industrial, laboratory, or specialized gas applications** where **corrosion resistance, fine flow control, and reliability** are critical. Its **stainless steel construction, Teflon seat, and Swagelok compatibility** make it a strong choice for professionals who prioritize durability and performance.

However, its **limited temperature rating, higher cost, and suitability only for moderate flow applications** may not make it the best fit for **high-temperature, high-volume, or cost-sensitive** setups. If these limitations are acceptable for your use case, this valve is an excellent investment. Otherwise, alternatives like **ball valves (for high flow), reinforced high-temperature models, or budget-friendly brands** may be more appropriate.

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- You need a **reliable, corrosion-resistant valve** for **moderate-pressure (3000 PSI) and moderate-temperature (100 F) applications**.

- Your system **requires fine flow control** (e.g., gas chromatography, calibration, pilot systems).

- You are already using **Swagelok components** and need seamless integration.

- You can justify the **premium cost** for long-term durability and precision.

- You require **higher temperature ratings** (look for -40 F to 400 F models).

- Your application demands **high flow rates** (switch to a globe or ball valve).

- Budget constraints make Swagelok too expensive (explore **high-quality generic brands** with similar specs).

- You need **larger sizes** (e.g., 1/2" or 3/4" valves).

For most **industrial, lab, or gas-handling applications**, this valve is a **solid choice** just ensure it meets your specific pressure, temperature, and flow requirements.

Details:

The Swagelok B-1RS4 Brass Needle Valve is a high-pressure valve designed for use in hydraulic, pneumatic, and plumbing systems. Please refer to the photos. Made from brass, it offers excellent corrosion resistance and is suitable for a wide range of environments. With a maximum pressure rating of 3000 PSIG at 100F, this valve is reliable and durable for demanding industrial applications.

part #: b1rs4 prices

• $26.32-$59.01

specifications valvesplumbing:

• brand: Swagelok
• mpn: B-1rs4
• part type: Valve
• body material: Brass
• country of origin: United States

offer valvesplumbing:

• options: Ship-to-home
• best offers: True
• availability: In Stock
• sold: 0
• started: April 5, 2026
• quantity: 1

shipping valvesplumbing:

• cost: $0.00
• service: Standard
• transit: 4-10 Days
• type: Fixed
• class: Standard

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seller valvesplumbing:

• rating: 99.5%
• # reviews: 9176
• city: Garfield, New Jersey

returns valvesplumbing:

• paid by: Seller
• policy: Returns Accepted
• time: 30 Days
• method: Money back

general valvesplumbing:

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

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