SWAGELOK SS-4-1 Nuts Nupro Check Valve 1/4 1PSI

( Brand: Swagelok ), ( Manufacturer Part Number: SS-4-1 ), ( Model: NUPRO ), ( Part Type: Valve Check )

Review SWAGELOK Various Pieces Mostly 1/4 Inch Nuts And Nupro 1psi Check Valve

The **Swagelok SS-4-1 1 " Nupro 1 PSI Check Valve** is a precision-engineered, high-performance fluid control component designed for demanding applications where reliability, durability, and leak-free operation are paramount. Constructed from **316 stainless steel (SS-4-1)**, this check valve combines the robustness of Swagelok s renowned fittings with the advanced sealing technology of the Nupro series, ensuring exceptional performance in corrosive, high-pressure, or high-purity environments. The valve features a **1 " (31.75 mm) nominal size**, making it ideal for medium-flow systems where precise fluid regulation is critical, such as in laboratory instrumentation, pharmaceutical processing, semiconductor manufacturing, or industrial gas delivery. Its **1 PSI (0.07 bar) closing pressure** allows for minimal backflow resistance while maintaining a tight seal, preventing reverse flow without excessive pressure drop, which is essential for maintaining system integrity in sensitive applications.

The design incorporates a **spring-loaded poppet mechanism**, which ensures rapid and consistent activation, reducing the risk of fluid contamination or pressure surges. The **Nupro sealing technology** utilizes a **PTFE (polytetrafluoroethylene) or Viton -coated elastomeric seal**, depending on the model variant, providing excellent chemical resistance to a wide range of solvents, acids, and bases while maintaining low outgassing and permeation properties critical for applications requiring ultra-high purity. The valve s **swaged connection** (via Swagelok s SS-4-1 tubing fittings) ensures a leak-tight, vibration-resistant joint, eliminating the need for threaded or flanged connections that could introduce weak points in the system. Additionally, the **all-metal construction** minimizes the risk of seal degradation over time, making it suitable for long-term use in harsh conditions where plastic or composite materials might fail.

Beyond its functional superiority, the **SS-4-1 1 " Nupro Check Valve** is engineered for ease of installation and maintenance. The **quick-connect design** allows for straightforward integration into existing Swagelok systems, while the **non-lubricated sealing surfaces** reduce the potential for cross-contamination. Its compact yet sturdy form factor ensures it fits seamlessly into tight spaces, whether in a bench-top laboratory setup or within a larger industrial process line. For applications requiring **cleanliness and sterility**, the valve can be easily disassembled and cleaned, and its materials are compatible with **autoclaving and CIP/SIP (Clean-In-Place/Steam-In-Place) processes**, making it a versatile choice for industries with stringent hygiene standards. Whether used to prevent backflow in gas delivery systems, protect sensitive instrumentation from pressure spikes, or ensure unidirectional fluid flow in critical processes, this check valve delivers the precision, reliability, and longevity expected from Swagelok s industry-leading fluid control solutions.

### Pros and Cons of buying a Swagelok SS-4-1 1/4" Nupro 1 PSI Check Valve

1. **High-Quality Material:** The valve is made from stainless steel (SS-4-1), which is corrosion-resistant, durable, and suitable for a wide range of industrial applications, including chemical processing, pharmaceuticals, and food/beverage industries.

2. **Reliable Performance:** Nupro check valves are known for their consistent and reliable operation, preventing backflow and ensuring unidirectional flow in piping systems. The 1 PSI differential pressure rating indicates it can handle minor pressure surges without failing.

3. **Compatibility:** The 1/4" size is versatile for small-scale applications, such as lab setups, pilot plants, or low-flow systems. It integrates seamlessly with Swagelok fittings, ensuring leak-free connections.

4. **Maintenance-Free Design:** The valve has no moving parts that require frequent lubrication or adjustment, reducing long-term maintenance costs.

5. **Cleanability:** Stainless steel construction is easy to clean and sterilize, making it ideal for applications where hygiene is critical, such as in pharmaceutical or food processing.

6. **Brand Reputation:** Swagelok and Nupro are trusted brands in the industrial fluid handling sector, offering warranties and technical support for their products.

7. **Versatility:** The valve can be used in various media, including gases, liquids, and even some corrosive substances, depending on the specific application and operating conditions.

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1. **Limited Pressure Rating:** The 1 PSI differential pressure rating means it is not suitable for high-pressure applications. If the system experiences significant pressure spikes, the valve may not provide adequate protection.

2. **Size Restriction:** The 1/4" size limits its use to low-flow applications. For larger systems or higher flow rates, a larger valve would be required.

3. **Cost:** Swagelok and Nupro products are premium-priced compared to generic or lower-end brands. For budget-conscious buyers, this may be a significant drawback.

4. **Specialized Installation:** Proper installation requires Swagelok-style fittings, which may not be compatible with existing systems that use different connection types. This could require additional adapters or modifications.

5. **Potential for Leakage Under Extreme Conditions:** While the valve is reliable for its rated conditions, extreme temperature fluctuations or prolonged exposure to corrosive media could compromise its sealing over time.

6. **Limited Customization:** The valve is a standard design and may not offer custom features like adjustable pressure settings or specialized materials for niche applications.

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The **Swagelok SS-4-1 1/4" Nupro 1 PSI check valve** is an excellent choice for applications requiring a reliable, corrosion-resistant, and low-maintenance check valve in small-scale or low-pressure systems. Its stainless steel construction ensures durability and cleanability, making it ideal for industries where hygiene and precision are critical. However, its limitations in pressure handling, size, and cost may make it unsuitable for high-pressure or large-scale applications.

- **Buy it if:** You need a dependable check valve for a low-pressure, small-scale system (e.g., lab, pilot plant, or food/pharmaceutical processing) where stainless steel and Swagelok compatibility are essential.

- **Avoid it if:** Your application involves high pressure, large flow rates, or requires a more cost-effective solution. In such cases, consider alternatives like larger-sized check valves, generic brands, or valves with higher pressure ratings.

- **Consider alternatives:** If the 1 PSI rating is insufficient, explore valves with higher differential pressure ratings (e.g., 5 PSI or 10 PSI). For larger systems, opt for 1/2" or 3/4" valves. If budget is a concern, evaluate other reputable brands that offer similar functionality at a lower cost.

Details:

Up for sale is one Various Swagelok Pieces mostly 1/4 Nuts and NUPRO 1PSI Check Valve.

part #: ss41 prices

• $84.15-$254.15

specifications automationjack:

• brand: Swagelok
• mpn: Ss-4-1
• model: Nupro
• part type: Valve Check

seller automationjack:

• # reviews: 1719
• city: Nashville, Tennessee
• rating: 99.6%

payments automationjack:

• other
• credit card: Visa
• wallet: Google-pay

shipping automationjack:

• type: Calculated
• carrier: UPS, USPS
• cost: $0.00
• service: UPS Ground, USPS Ground Advantage, USPS Priority Mail
• class: Standard, Expedited
• transit: 3-7 Days

offer automationjack:

• sold: 0
• availability: In Stock
• started: April 6, 2026
• options: Ship-to-home
• quantity: 1
• best offers: True

general automationjack:

• condition: Used
• Business Industrial > Industrial Automation Motion Controls > Other Automation Equipment

returns automationjack:

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