MASONEILAN SVI2-21121111 Dresser Digital Valve Positioner Svi Masoneilan/dresser 150

( Brand: Masoneilan ), ( Manufacturer Part Number: SVI2-21121111 ), ( Part Type: Digital Valve ), ( Country Of Origin: United States ), ( Suitable Media: Air, Gas ), ( Valve Operation: Air-operated )

Review MASONEILAN Masoneilan/dresser Digital Valve Positioner 150 Psi Svi ii

The **Masoneilan SVI-II 2-21121111 Digital Valve Positioner** from the Dresser brand is a high-performance, intelligent actuator designed to deliver precise and reliable control for critical process applications in industries such as oil and gas, chemical processing, power generation, and water treatment. Part of the advanced **SVI-II series**, this digital valve positioner combines cutting-edge technology with robust engineering to ensure optimal valve operation under demanding conditions. Engineered with a **150-class pressure rating**, it is built to handle high-pressure environments while maintaining exceptional accuracy and responsiveness, making it ideal for applications where tight control of flow, pressure, or temperature is essential.

At its core, the **SVI-II 2-21121111** features a **digital control system** that integrates seamlessly with modern SCADA and DCS platforms, enabling real-time monitoring, diagnostics, and remote adjustments. The positioner utilizes a **high-resolution encoder** for precise feedback, ensuring that the valve achieves and maintains the exact desired position with minimal hysteresis and repeatability errors. Its **fail-safe design** includes redundant sensors and robust electronics to prevent malfunctions, while its **wide torque range** accommodates a variety of valve sizes and operating conditions, from small control valves to large gate or globe valves. The unit is also equipped with **adjustable gain settings**, allowing operators to fine-tune the response to varying load conditions, ensuring smooth and efficient valve actuation even under dynamic process fluctuations.

The **SVI-II series** is renowned for its **durability and longevity**, with components constructed from corrosion-resistant materials such as stainless steel and specialized coatings to withstand harsh environments, including exposure to moisture, chemicals, and extreme temperatures. Its **modular design** allows for easy installation and maintenance, with quick-connect wiring and accessible diagnostic ports that simplify troubleshooting. Additionally, the positioner supports **multiple communication protocols**, including **HART, Profibus, Foundation Fieldbus, and Modbus**, ensuring compatibility with virtually any industrial control system. This flexibility makes it a versatile solution for both new installations and retrofits in existing infrastructure.

Beyond its technical capabilities, the **Masoneilan SVI-II 2-21121111** is designed with **operator convenience in mind**, featuring an intuitive **LCD display** for real-time parameter viewing and configuration. The positioner also includes **self-diagnostic tools** that alert operators to potential issues before they escalate, reducing downtime and improving overall system reliability. Whether deployed in a **refinery, power plant, or water treatment facility**, this digital valve positioner delivers unmatched precision, efficiency, and operational resilience, making it a cornerstone of modern process automation.

### **Pros and Cons of buying a Masoneilan SVI-II 2-21121111 Digital Valve Positioner (150 Series)**

#### **Pros**

1. **High Reliability and Durability**

The SVI-II series is known for robust construction, designed to withstand harsh industrial environments. It is built with high-quality materials that resist corrosion, vibration, and temperature fluctuations, ensuring long-term performance in critical applications such as oil and gas, power generation, and chemical processing.

2. **Advanced Digital Positioning Control**

This valve positioner features precise digital control, allowing for accurate and repeatable valve positioning. It integrates seamlessly with distributed control systems (DCS) and programmable logic controllers (PLCs), enabling real-time monitoring and adjustments. The digital interface reduces manual intervention and improves operational efficiency.

3. **Wide Compatibility**

The SVI-II 2-21121111 is compatible with a broad range of actuators and valves, including Masoneilan s own line of quarter-turn and linear valves. This flexibility makes it a versatile choice for retrofitting existing systems or integrating into new installations.

4. **Enhanced Safety Features**

The positioner includes built-in safety mechanisms such as fail-safe positioning, over-travel protection, and diagnostics that alert operators to potential issues before they escalate. This reduces the risk of equipment failure or process disruptions.

5. **Energy Efficiency**

By providing precise control over valve actuation, the SVI-II helps optimize flow rates and pressure, leading to reduced energy consumption in pumping and compression systems. This can result in cost savings over the valve s operational lifespan.

6. **Easy Installation and Maintenance**

The design is user-friendly, with clear labeling and modular components that simplify installation and servicing. The positioner s diagnostics tools allow for quick troubleshooting, minimizing downtime.

7. **Industry Standards Compliance**

The SVI-II meets or exceeds industry standards such as API 609 (for quarter-turn valves) and ANSI/ISA standards for valve positioners. This ensures compatibility with regulatory requirements and best practices in industrial automation.

8. **Scalability**

The 150 series is part of a scalable family of positioners, meaning it can be easily upgraded or paired with other Masoneilan products as operational needs evolve. This future-proofing makes it a cost-effective long-term investment.

---

#### **Cons**

1. **High Initial Cost**

As a premium digital positioner, the SVI-II carries a higher upfront cost compared to analog or basic digital positioners. This may be a barrier for smaller operations or projects with tight budgets.

2. **Complexity in Operation**

The advanced digital features, while beneficial, require trained personnel to operate, program, and maintain the positioner. Training costs and the need for skilled technicians may add to the overall operational expense.

3. **Dependency on Power Supply**

The digital nature of the SVI-II requires a stable power source. In environments with frequent power fluctuations or blackouts, backup power solutions (e.g., batteries or UPS) may be necessary, adding to the system s complexity and cost.

4. **Potential for Software Issues**

Digital systems are susceptible to software glitches, firmware updates, or compatibility issues with other control systems. While Masoneilan provides support, resolving such issues may require technical assistance, leading to temporary downtime.

5. **Limited Availability of Spare Parts**

As a specialized product, spare parts for the SVI-II may not be as readily available as for more common positioners. This could prolong repair times if components fail unexpectedly.

6. **Integration Challenges**

While the SVI-II is designed for compatibility, integrating it with legacy systems or non-Masoneilan equipment may require additional configuration or third-party interfaces. This could introduce delays or require additional expertise.

7. **Maintenance Requirements**

Although the SVI-II is durable, its digital components may require periodic calibration, firmware updates, or software diagnostics. Neglecting these can lead to reduced performance or failure over time.

---

### **Conclusion**

The Masoneilan SVI-II 2-21121111 digital valve positioner is a high-performance, reliable, and feature-rich solution for industries requiring precise control, safety, and efficiency in valve actuation. Its advanced digital capabilities, compatibility, and durability make it an excellent choice for critical applications such as oil and gas, power plants, and chemical processing. However, the higher cost, complexity, and dependency on power and technical expertise may pose challenges for smaller operations or budget-constrained projects.

For businesses prioritizing long-term reliability, operational efficiency, and integration with modern control systems, the SVI-II is a strong recommendation. Conversely, organizations with limited budgets, simpler requirements, or existing analog systems may find that a lower-cost analog positioner or a more basic digital alternative would suffice.

### **Recommendation**

- Your application demands high precision, safety, and integration with digital control systems.

- You operate in an environment where reliability and long-term performance are critical (e.g., oil and gas, power generation, or chemical processing).

- You have the budget and technical resources to support its advanced features and potential maintenance needs.

- You plan to future-proof your system with scalable and upgradeable components.

- Your budget is constrained, and you can achieve similar results with a lower-cost analog or basic digital positioner.

- Your system lacks the infrastructure (e.g., stable power, trained personnel) to support advanced digital controls.

- Your application does not require the high level of precision or diagnostics offered by the SVI-II.

In summary, the SVI-II is a superior choice for industries needing cutting-edge valve control but may not be the most practical option for simpler or cost-sensitive applications.

Details:

When more economical for pricing UPS and FEDEX are used also. Vintage clothing items and new old stock will not be laundered may smell musty, stale, etc. Used working condition. And Condition.

Items are tested when possible and multiple pictures taken so you can see the item powers on, actual condition, items included. I am always happy to try and resolve issues with buyers. Please message before requesting a return.

part #: svi221121111 prices

• $499.99-$1098.00

specifications valvesplumbing:

• brand: Masoneilan
• mpn: Svi2-21121111
• part type: Digital Valve
• country of origin: United States
• suitable media: Air, Gas
• valve operation: Air-operated

returns valvesplumbing:

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

general valvesplumbing:

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

payments valvesplumbing:

• wallet: Paypal
• credit card: Visa
• other

seller valvesplumbing:

• city: Lewisburg, Tennessee
• # reviews: 7645
• rating: 99.9%

offer valvesplumbing:

• availability: In Stock
• quantity: 1
• sold: 0
• started: May 3, 2026
• best offers: True
• options: Ship-to-home

shipping valvesplumbing:

• service: USPS Ground Advantage
• class: Standard
• transit: 4-8 Days
• type: Fixed
• carrier: USPS
• cost: $0.00

Masoneilan SVI2-21121111 Is Similar To:

• 021107-020 Masoneilan Dresser New Valve Diaphragm (47% similar) New Masoneilan dresser diaphragm 13IN valve replacement part D604299 brand:Masoneilan condition: without factory packaging model: shipping. 95 lbs shipping DIMENSIONS:13...(March 20th, 2018)
• 055100021999 Masoneilan 4700 Positioner Mounting (41.2% similar) ...(January 7th, 2018)
• Svi2-21123111 Masoneilan Dresser Svi-ii Digital (56.9% similar) ...(February 9th, 2018)
• 33 36414 Masoneilan Paramax Varipak Pneumatic Actuated Psi To Close Ball Valve (33.3% similar) Supply 30 psi minimum CV seat 4PH maximum 15PSI b 1 air to close valve condition is used. Shipped with USPS first class package. ANSI body 316 l plug Stella. Masoneilan repack pneumatic actuated 30 psi 1 inch ball valve...(July 27th, 2019)
• Masoneilan 1002asy36y00sdln36 Badger Meter Svi-2 Ato Research Control Valve 27a (35.8% similar) Attached to this valve is a Masoneilan SVI-2 31123111 positioner. Equipment recycle has used its best efforts to inspect the item for sale and create furnish photographs that fairly adequately depict type, condition image of goods at time. For sale by equipment recycle is a badger meter Masoneilan ...(September 13th, 2024)
• Masoneilan 27-28132ms Control Valve Assembly T208292 (45.9% similar) Masoneilan 27-28132MS control valve assembly T208292 warranty information: this is a used item, in good condition and includes 30 day warranty...(September 16th, 2024)
• Dresser Masoneilan 35-35212 Camflex Ii 2 Inch Pneumatic Control Valve Ss Body 214b (27.9% similar) Equipment recycle has used its best efforts to inspect the item for sale and create furnish photographs that fairly adequately depict type, condition image of goods at time. They are all manufacturer: dresser Masoneilan, model #: 35-35212, location: 214B, list date: 10/23/24, rating: 3, listing ...(October 23rd, 2024)
• Industrial Mro Knox090069545-35-35212 Masoneilan Dresser 35-35212 7-15psi 1 Inch Unmp (38.1% similar) Valve, 7-15PSI: ump condition codes:: NSF new surplus factory sealed oem Nampa manufacturer package snap no UPI unused previously installed remain remanufactured like used or repaired about our product: industrial blue line special is an industrial surplus dealer. If another carrier such as DHL or ...(October 27th, 2024)
• Masoneilan Fvp110 Foundation Fieldbus Valve Positioner 20-60psi 1 Y Warranty (54.1% similar) Masoneilan foundation field bus valve positioner FVP110 20-60PSI 1 y warranty: S1.02. These types include 30 day, 90 1 year and...(January 16th, 2025)
• Masoneilan 33-37322 Butterfly Valve T154820 (44.4% similar) Open to making bulk deals. Glad you stopped by. Rush orders ship same day. We proudly sell hard-to-find parts, components, and machines to makers manufacturers. Extra information. Masoneilan 33-37322 butterfly valve T154820 brand:: Masoneilan, condition: this is a used item, in good condition and ...(February 1st, 2025)
• Masoneilan 33-36315 Sv12-21113111 Ball Valve 6 Inch 316ss Pneumatic (50.7% similar) Processing times can vary, particularly during peak periods. Includes svi-ii digital valve positioner, CL150 flange. Everything included is shown in the photos...(June 18th, 2025)