MASONEILAN 33-36424 Pneumatic Flanged Control Valve P-2000 4IN 150

( Brand: Masoneilan ), ( Manufacturer Part Number: 33-36424 ), ( Part Type: Pneumatic Control Valve Flanged ), ( Positioner Model : P-2000 ), ( Size: 4 In ), ( Actuation Type: Pneumatic ), ( Material: Stainless ), ( Mounting Type: Flanged ), ( Class: 150 ), ( Reference Sku: 1763229 ), ( Product Condition: Used Excellent )

Review MASONEILAN Pneumatic Stainless Flanged Control Valve 4in 150

The **Masoneilan 33-36424 P-2000 Pneumatic Flanged Control Valve (4" Size, Class 150)** is a high-performance, precision-engineered solution designed to deliver reliable and efficient flow control in demanding industrial applications. Part of Masoneilan s renowned **P-2000 Series**, this valve combines robust construction with advanced pneumatic actuation to provide seamless regulation of liquids, gases, and steam across a wide range of process conditions. Built with a **4-inch (100 mm) nominal size** and rated for **Class 150 pressure ratings**, it ensures compatibility with systems operating at pressures up to 300 psi (20 bar) while maintaining exceptional tightness and durability. The valve features a **flanged end connection**, adhering to ANSI standards, which simplifies installation and integration into existing piping systems, reducing the need for additional fittings or adapters.

At the heart of this valve is the **Masoneilan P-2000 pneumatic actuator**, a compact yet powerful component that delivers precise and responsive control through a **fail-safe design** either fail-open or fail-close depending on application requirements. The actuator operates on compressed air, offering consistent and repeatable positioning with minimal hysteresis, making it ideal for applications demanding high accuracy, such as chemical processing, power generation, and water treatment. Its **modular design** allows for easy maintenance, with components like the diaphragm, stem, and packing accessible without disassembling the entire assembly, ensuring extended operational life with reduced downtime.

The valve s **body construction** is engineered for durability, featuring a **cast carbon steel body** (standard) that resists corrosion and wear, while optional materials such as **stainless steel or alloy castings** provide enhanced resistance to aggressive media, including acids, alkalis, and high-temperature fluids. The **trim components**, including the globe-style plug and seat, are designed for optimal flow characteristics, minimizing pressure drop while maintaining tight shutoff critical for applications requiring leak-proof isolation. The **soft-seated design** (available in options like PTFE, EPDM, or Viton) ensures superior sealing performance across a broad temperature range, from cryogenic to high-temperature steam service.

For enhanced process monitoring and control, the **P-2000 actuator** integrates seamlessly with **Masoneilan s digital and analog positioners**, enabling precise feedback and automatic adjustments to maintain desired flow rates. The valve s **pneumatic signal compatibility** (standard 3-15 psi or 20-100 kPa) ensures compatibility with most industrial control systems, while optional **limit switches, positioners, or handwheels** provide additional functionality for manual override or advanced automation. The **flanged design** not only facilitates easy installation but also allows for future upgrades or modifications without disrupting the entire system.

Whether deployed in **power plants for steam control, refineries for fluid regulation, or municipal water treatment facilities for precise chemical dosing**, the **Masoneilan 33-36424 P-2000 valve** delivers uncompromising performance, reliability, and operational efficiency. Its combination of **high-quality materials, precise actuation, and modular maintainability** makes it a trusted choice for engineers and operators seeking a valve that balances robustness with adaptability in even the most challenging industrial environments.

### **Pros and Cons of buying a Masoneilan 33-36424 P-2000 Pneumatic Flanged Control Valve (4" 150 Class)**

#### **Pros**

1. **High-Quality Brand Reputation**

Masoneilan is a well-established manufacturer in the process control industry, known for durable, reliable, and high-performance control valves. Their products are widely used in oil, gas, chemical, and water treatment applications, ensuring compatibility with demanding environments.

2. **Pneumatic Actuation (P-2000 Series)**

The P-2000 pneumatic actuator is designed for precise control, offering smooth and consistent operation. It is compatible with standard air signals (3-15 PSI or 20-100 kPa), making it easy to integrate with existing control systems. The actuator is also fail-safe, allowing for either fail-open or fail-close configurations depending on application needs.

3. **Flanged Connections (150# Class)**

The 150# flanged design provides a robust and leak-tight connection, suitable for high-pressure applications. Flanged valves are easier to install and maintain compared to threaded or welded options, especially in large pipelines where frequent inspections or replacements may be required.

4. **Large Size (4" Nominal)**

A 4-inch valve is ideal for medium to high-flow applications, such as water distribution, wastewater treatment, or industrial process lines. The larger size reduces pressure drop and turbulence, improving system efficiency.

5. **Versatile Trim Options**

The valve can be configured with various trim materials (e.g., stainless steel, carbon steel, or exotic alloys like Hastelloy) to match the process fluid requirements. This flexibility ensures compatibility with corrosive, abrasive, or high-temperature media.

6. **Modular Design**

The modular construction allows for easy maintenance and repair. Components like the actuator, stem, and trim can often be replaced without dismantling the entire valve, reducing downtime.

7. **Compatibility with Control Systems**

The valve works seamlessly with PLCs, DCS, and other automation systems, making it suitable for automated process control. The pneumatic actuator can be paired with positioners for enhanced accuracy.

8. **Long Service Life**

Masoneilan valves are built to last, with robust construction and high-quality materials that resist wear, corrosion, and fatigue. This reduces the need for frequent replacements, lowering long-term costs.

9. **Wide Industry Applications**

- Oil and gas (pipeline control, refineries)

- Water and wastewater treatment

- Chemical processing

- Power generation (steam, cooling water)

- HVAC systems

10. **Warranty and Support**

Masoneilan offers warranties and technical support, ensuring that users have access to spare parts, maintenance guides, and troubleshooting assistance when needed.

---

#### **Cons**

1. **High Initial Cost**

Masoneilan valves, especially high-quality models like the P-2000 series, are premium-priced compared to generic or lower-end brands. The cost may be prohibitive for small-scale or budget-constrained projects.

2. **Complex Installation and Calibration**

Pneumatic control valves require proper installation, including correct piping, air supply setup, and calibration of the actuator and positioner. Improper installation can lead to performance issues or safety hazards. Professional assistance may be needed, adding to labor costs.

3. **Maintenance Requirements**

While the valve is durable, pneumatic actuators and trim components may require periodic maintenance, such as lubrication, sealing checks, and calibration. Neglecting maintenance can lead to reduced performance or failure over time.

4. **Spare Parts Availability**

While Masoneilan has a strong reputation, some specialized trim or actuator parts may have longer lead times or higher costs, especially for older models. Ensuring availability of spare parts is crucial for long-term reliability.

5. **Energy Consumption**

Pneumatic systems require compressed air, which may not be energy-efficient compared to electric actuators. In applications where energy costs are a concern, this could be a drawback.

6. **Size and Weight**

A 4-inch flanged valve is bulky and heavy, requiring careful handling during installation. This may complicate transportation and installation in space-constrained environments.

7. **Potential for Leakage (If Not Properly Maintained)**

Over time, seals and gaskets in flanged valves can degrade, leading to leaks. Regular inspections are necessary to prevent operational disruptions.

8. **Limited Customization for Non-Standard Applications**

While the valve is versatile, highly specialized applications (e.g., extreme temperatures, aggressive chemicals) may require non-standard modifications that could increase costs or reduce availability.

9. **Training Required for Operation and Maintenance**

Operators and maintenance personnel may need training to properly handle, calibrate, and troubleshoot the valve, adding to training costs.

10. **Potential for Overkill in Low-Demand Applications**

For very low-flow or low-pressure applications, a 4-inch 150# valve may be more expensive than necessary. In such cases, a smaller or lower-class valve could suffice.

---

### **Conclusion**

The **Masoneilan 33-36424 P-2000 pneumatic flanged control valve (4" 150#)** is a high-performance, reliable, and versatile valve suitable for medium to large-scale process control applications. Its strengths lie in its durability, precision, compatibility with automation systems, and suitability for demanding environments. However, its premium price, maintenance requirements, and complexity of installation may pose challenges for smaller projects or budget-sensitive applications.

For industries where reliability, precision, and long-term performance are critical such as oil and gas, water treatment, or chemical processing the benefits outweigh the drawbacks. Conversely, for applications where cost or simplicity is the primary concern, a lower-cost alternative (e.g., a different brand or smaller valve size) might be more appropriate.

---

### **Recommendation**

- You are working on a **large-scale or high-reliability application** (e.g., pipeline control, refinery, water treatment).

- Your system requires **precise pneumatic control** with fail-safe capabilities.

- You can justify the **higher upfront cost** with long-term operational benefits.

- Proper **installation, maintenance, and training** are feasible.

- Your budget is **limited**, and a lower-cost valve (e.g., from another reputable brand) meets your requirements.

- The application is **low-flow or low-pressure**, making a smaller valve size more cost-effective.

- You lack **expertise in pneumatic systems**, as improper setup could lead to performance issues.

- Spare parts **availability or lead times** are a concern for your specific region.

For most **industrial process control applications**, this valve is an excellent choice due to its proven performance and longevity. However, always conduct a **cost-benefit analysis** and consult with a process control specialist to ensure it aligns with your specific needs.

Details:

Pneumatic Exhaust Valves. Pneumatic Relays. Pneumatic Cylinders. Actuation Type:Pneumatic.

Pneumatic Directional Valves. Pneumatic Filter-Regulators. Mounting Type:Flanged. Pneumatic Filters.

part #: 3336424 prices

• $1800.00-$2500.00

specifications valvesplumbing:

• brand: Masoneilan
• mpn: 33-36424
• part type: Pneumatic Control Valve Flanged
• positioner model : P-2000
• size: 4 In
• actuation type: Pneumatic
• material: Stainless
• mounting type: Flanged
• class: 150
• reference sku: 1763229
• product condition: Used Excellent

seller valvesplumbing:

• rating: 100.0%
• # reviews: 127672
• city: Delta, Ohio

payments valvesplumbing:

• wallet: Google-pay
• credit card: Diners-club
• other

returns valvesplumbing:

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

offer valvesplumbing:

• sold: 0
• started: April 25, 2026
• quantity: 1
• best offers: True
• options: Ship-to-home
• availability: In Stock

general valvesplumbing:

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

shipping valvesplumbing:

Masoneilan 33-36424 Is Similar To:

• 021107-020 Masoneilan Dresser New Valve Diaphragm (38.4% 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)
• 35-35102 Masoneilan 4 150 Flanged (40.4% similar) ...(September 12th, 2017)
• 35-35202 Masoneilan 2 300 Flanged (42.2% similar) Action: air to open range: 7/1 5 psi, supply: 20 psi material body: cs A216 gr. 88 actuator type: 35 spring-opposed rolling diaphragm size: diameter with : pneumatic 3-15 psi. Masoneilan 2 cam flex ii rotary control valve model: size: body: inch, CV: 20, orifice: 1 DOA. WC plug: satellite, seat: ...(June 17th, 2017)
• 33 36414 Masoneilan Paramax Varipak Pneumatic Actuated Psi To Close Ball Valve (47.7% 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 (45.2% 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 (51.6% 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 (54.4% 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)
• Masoneilan 2715 Pressure And Temperature Control Unit Model Used (42.9% similar) Masoneilan pressure and temperature control unit model 2715 used used. Free shipping. Unit shows signs of previous mounting/use and may have some mild scuffing/shelf wear and/or superficial surface rusting on.d. Government surplus. Measuring devices shown in picture for scaling purposes only and are...(December 7th, 2024)
• Masoneilan Fvp110 Foundation Fieldbus Valve Positioner 20-60psi 1 Y Warranty (40.8% 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 (57.1% 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 (40.6% similar) Processing times can vary, particularly during peak periods. Includes sci-ii digital valve positioner, CL150 flange. Everything included is shown in the photos...(June 18th, 2025)