SWAGELOK MS-151-DA Pneumatic Actuator B-42XTF2-NH 349696

( Brand: Swagelok ), ( Manufacturer Part Number: MS-151-DA ), ( Part Type: Pneumatic Actuator )

Review SWAGELOK Attached Part Pneumatic Actuator #349696

The **Swagelok MS-151-DA-B-42XTF2-NH Pneumatic Actuator (Part #349696)** is a high-performance, modular valve actuator designed to deliver precise and reliable control in demanding industrial, oil and gas, and process automation applications. Part of Swagelok s robust **MS Series**, this actuator is engineered for seamless integration with a wide range of quarter-turn valves, including ball, butterfly, and plug valves, offering unmatched versatility in fluid handling systems. Its **B-series** designation signifies a compact yet robust construction, optimized for applications where space efficiency is critical without compromising on performance. The **42XTF2** designation highlights its **42-inch (1067mm) stroke length**, making it ideal for large-scale valves that require substantial rotational movement for full opening and closing cycles. The **DA** variant incorporates a **direct-acting pneumatic design**, ensuring rapid response times and consistent actuation force, even under varying load conditions, while the **NH** suffix indicates a **non-hydraulic assist** configuration, which simplifies installation and reduces maintenance complexity.

Built to withstand the harshest environments, this actuator features a **stainless steel (SS316) construction** throughout its critical components, including the cylinder, piston, and mounting flanges, providing superior corrosion resistance in corrosive media, high-salt atmospheres, or wet conditions. The **double-acting pneumatic system** ensures bidirectional control, allowing for precise positioning and smooth operation in both opening and closing directions, while the integrated **limit switches** provide fail-safe feedback, enhancing system reliability and enabling seamless integration with PLCs or SCADA systems. The actuator s **modular design** allows for easy customization, with interchangeable mounting options (such as flange, trunnion, or lug mounts) and adaptable pneumatic fittings (e.g., NPT, ISO, or metric connections) to accommodate diverse valve configurations. Additionally, its **sealed internal components** minimize the risk of contamination, making it suitable for applications in cleanroom environments or where hygiene is paramount.

For enhanced durability, the MS-151-DA-B-42XTF2-NH incorporates **low-friction seals and bearings**, reducing wear and extending operational lifespan, even under frequent cycling or high-pressure conditions. The actuator s **pneumatic control system** operates efficiently within a standard air pressure range of **80 100 psi (5.5 6.9 bar)**, though it can be adapted for alternative pressure inputs if required, ensuring compatibility with existing plant infrastructure. Its **compact yet sturdy build** minimizes footprint requirements while maintaining structural integrity, making it an excellent choice for retrofitting existing systems or deploying in space-constrained facilities. Whether deployed in **oil and gas pipelines, chemical processing plants, water treatment facilities, or industrial automation setups**, this actuator delivers **consistent, repeatable performance** with minimal maintenance, reinforcing Swagelok s reputation for engineering precision and longevity into every component.

### Pros and Cons of buying a Swagelok MS-151-DA-B-42XTF2-NH Pneumatic Actuator (Part #349696)

1. **High Quality and Reliability** Swagelok is a well-established brand known for manufacturing high-quality, durable instrumentation and control components. The MS-151 series is designed for precision and long-term performance, making it suitable for industrial applications where reliability is critical.

2. **Precision and Accuracy** This pneumatic actuator is engineered for precise control of valves, ensuring consistent and repeatable operation. The dual-acting (DA) design allows for bidirectional control, which is essential in applications requiring both opening and closing functions.

3. **Compatibility with Swagelok Systems** As part of the Swagelok family, this actuator integrates seamlessly with other Swagelok components, such as valves, fittings, and tubing systems. This compatibility simplifies installation, maintenance, and troubleshooting within a unified system.

4. **Durability and Corrosion Resistance** The actuator is constructed with materials that resist corrosion and wear, making it suitable for harsh environments, including those exposed to chemicals, moisture, or temperature fluctuations. The stainless steel and other high-grade materials enhance longevity.

5. **Adjustable Stroke and Positioning** The MS-151 series offers adjustable stroke lengths and positioning, allowing for customization to fit specific valve sizes and operational requirements. This flexibility ensures optimal performance in various applications.

6. **Easy Installation and Maintenance** Swagelok components are designed with user-friendly features, such as quick-connect fittings and straightforward assembly procedures. The actuator s modular design also makes maintenance and repairs more accessible.

7. **Energy Efficiency** Pneumatic actuators like this one are generally more energy-efficient than electric alternatives, especially in applications where air compression is already available. They also provide quick response times, reducing downtime.

8. **Wide Range of Applications** This actuator is versatile and can be used in industries such as oil and gas, chemical processing, water treatment, and manufacturing. Its dual-acting capability makes it ideal for applications requiring bidirectional control, such as in control valves for fluid regulation.

9. **Support and Warranty** Swagelok offers comprehensive technical support, documentation, and warranty coverage. This ensures that users have access to assistance if issues arise, and the product is backed by a reputable manufacturer.

10. **Modular and Upgradable** The design allows for potential upgrades or modifications to meet evolving operational needs, extending the actuator s useful life and adaptability.

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1. **High Initial Cost** Swagelok products are premium-priced due to their quality and reliability. The MS-151-DA-B-42XTF2-NH actuator may have a higher upfront cost compared to generic or lower-end brands, which could be a barrier for budget-conscious buyers.

2. **Specialized Installation Requirements** While Swagelok components are designed for ease of use, proper installation often requires specialized tools, training, or expertise. Incorrect installation could lead to performance issues or safety hazards, potentially increasing labor costs.

3. **Dependence on Pneumatic Systems** Pneumatic actuators rely on a consistent air supply. If the facility lacks an existing pneumatic system or has unreliable air compression, additional infrastructure may be needed, adding complexity and cost.

4. **Limited Customization Options** While the actuator offers adjustable features, some users may find that the range of customization is limited compared to fully bespoke solutions. This could be a drawback for highly specialized applications.

5. **Maintenance Costs Over Time** Although durable, Swagelok actuators may require periodic maintenance, such as lubrication, sealing checks, or part replacements. While high-quality, the cost of replacement parts or professional servicing could accumulate over time.

6. **Potential for Overkill in Small-Scale Applications** For very small-scale or low-pressure applications, the robust design of the MS-151 series might be unnecessary, leading to higher costs without proportional benefits. In such cases, a simpler or smaller actuator could suffice.

7. **Lead Times for Replacement Parts** As with many premium brands, replacement parts or accessories may have longer lead times compared to more widely available generic components. This could cause delays in maintenance or repairs.

8. **Training Requirements** Operators or technicians unfamiliar with Swagelok systems may require training to fully utilize the actuator s features and ensure safe and efficient operation. This adds to the overall implementation cost.

9. **Size and Space Considerations** The MS-151 series is designed for robust performance, which may result in a larger footprint than smaller actuators. In space-constrained environments, this could be a limiting factor.

10. **Potential for Misuse in Non-Industrial Settings** While highly suitable for industrial applications, the actuator s industrial-grade design may not be practical or cost-effective for non-industrial uses, such as hobbyist projects or small-scale DIY setups.

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The Swagelok MS-151-DA-B-42XTF2-NH pneumatic actuator is a high-performance, reliable, and versatile component ideal for industrial applications where precision, durability, and compatibility with Swagelok systems are priorities. Its dual-acting design, adjustable features, and resistance to harsh conditions make it a strong choice for critical control applications in sectors like oil and gas, chemical processing, or manufacturing.

However, the actuator s premium cost, specialized installation requirements, and potential overkill for smaller applications may not justify the investment for all users. Buyers should carefully assess their specific needs, budget, and operational environment to determine whether the benefits outweigh the drawbacks.

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- You are working in an industrial setting where reliability, precision, and long-term performance are critical.

- Your facility already has a pneumatic system or can easily integrate one.

- You prioritize compatibility with other Swagelok components and benefit from their unified ecosystem.

- Your application requires bidirectional control (e.g., for valves in fluid regulation or process control).

- You are willing to invest in a high-quality, durable solution that minimizes downtime and maintenance headaches over the long term.

- Your budget is constrained, and you can find a similarly functional actuator at a lower cost from a reputable mid-range brand.

- Your application is small-scale, low-pressure, or non-industrial, where a simpler or smaller actuator would suffice.

- You lack the expertise or infrastructure to properly install and maintain the actuator, as improper use could compromise performance or safety.

- You require highly customized or non-standard features that the MS-151 series does not support.

For most industrial applications where performance and longevity are key, the Swagelok MS-151-DA-B-42XTF2-NH actuator is a highly recommended choice. However, conduct a thorough cost-benefit analysis and consult with a specialist if your requirements are highly specific or budget-sensitive.

Details:

SWAGELOK MS-151-DA. WITH ATTACHED PART NUMBER: B-42XTF2-NH. MANUFACTURER PART NUMBER: MS-151-DA. PRESSURE MAXIMUM RATING: 200psi.

part #: ms151 prices

• $295.00-$566.23

specifications generapneumati:

• brand: Swagelok
• mpn: Ms-151-da
• part type: Pneumatic Actuator

shipping generapneumati:

• cost: $21.44
• transit: 2-5 Days
• type: Calculated
• class: Standard, Expedited, One-day
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• carrier: FedEx, UPS, USPS

seller generapneumati:

• # reviews: 20956
• city: Clinton Township, Michigan
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• policy: No Returns

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general generapneumati:

• condition: Used
• Business Industrial > Hydraulics, Pneumatics, Pumps Plumbing > Other Hydraulics Pneumatics

offer generapneumati:

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

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