FLOWSERVE 4446TSW Ball Valve 11/2 R2 1-1/2 1000PSI 400DEG

( Brand: Flowserve ), ( Manufacturer Part Number: 4446TSW ), ( Part Type: Valve ), ( Housing Material: Carbon Steel ), ( Valve Operation: Manual ), ( Diameter: 1 1/2 In )

Review FLOWSERVE 11/2 R2 Ball Valve Series 1-1/2 Inch 1000psi Max 400deg

The **Flowserve 4446TSW 11/2" (1.5") R2 Ball Valve**, rated for **1000 psi (68.9 bar)** and capable of withstanding temperatures up to **400 F (204 C)**, is a high-performance, full-port, trunnion-mounted ball valve engineered for demanding industrial applications where reliability, durability, and precise flow control are critical. Designed with Flowserve s signature engineering excellence, this valve features a **cage-guided floating ball** configuration, ensuring smooth, low-torque operation while maintaining exceptional sealing integrity under high-pressure and high-temperature conditions. The **R2 designation** indicates a **resilient-seated version**, incorporating a dual-seal design with a **PTFE (polytetrafluoroethylene) or reinforced elastomeric insert** on the ball and seat, providing superior resistance to abrasion, corrosion, and chemical degradation, making it ideal for handling aggressive fluids such as acids, caustics, and hydrocarbons. The **11/2" (1.5") nominal size** offers a full-bore flow path, minimizing pressure drop and reducing erosion or deposition buildup within the valve body, which is particularly advantageous in pipelines transporting slurries, solids-laden fluids, or high-viscosity media. Constructed from **cast carbon steel (CCS) or stainless steel (SS 304/316) body material**, depending on the application requirements, the valve is built to withstand the harshest environments while maintaining structural integrity over extended service life. The **trunnion-mounted design** provides enhanced stability under high-pressure differentials, reducing the risk of ball rotation or valve body deformation, and the **top-entry design** allows for easy maintenance, inspection, and seat replacement without disassembling the pipeline. Additionally, the valve is equipped with a **double-block-and-bleed (DBB) feature**, enabling safe isolation and purging of trapped fluids, which is essential in applications requiring strict containment or compliance with safety regulations. Whether deployed in **oil and gas production, chemical processing, power generation, or water treatment facilities**, this valve delivers exceptional performance in critical service roles, including shut-off, regulation, and diversion of fluids under extreme conditions. Flowserve s rigorous testing and certification including compliance with **API 6D, API 608, and ANSI B16.34 standards** ensure that the 4446TSW meets or exceeds industry benchmarks for pressure containment, leak tightness, and operational reliability, making it a trusted choice for engineers and operators demanding peak performance in their fluid handling systems.

### **Pros and Cons of buying a Flowserve 4446TSW 1 " Ball Valve (1000 PSI, 400 F, R2 Rating)**

1. **High Pressure and Temperature Ratings** The valve is rated for **1000 PSI (69 bar) and 400 F (204 C)**, making it suitable for demanding industrial applications such as oil & gas, chemical processing, and power generation. This ensures reliability in extreme conditions.

2. **Full Port Design (R2 Rating)** The **R2 (full port) configuration** provides minimal pressure drop, allowing for maximum flow capacity. This is beneficial in systems where fluid velocity and efficiency are critical.

3. **Durable Construction** Flowserve is a reputable manufacturer known for high-quality, long-lasting valves. The **4446 series** is designed for harsh environments, with robust materials and tight sealing capabilities.

4. **Compatibility with Various Fluids** The valve can handle **corrosive, abrasive, and high-viscosity fluids**, making it versatile for different industrial applications, including hydrocarbons, chemicals, and steam.

5. **Standardized and Reliable Design** Being a well-established model, it is widely available, supported by spare parts, and backed by Flowserve s technical expertise, reducing downtime risks.

6. **Manual Operation (Assuming Standard Actuation)** If this is a manual valve (as implied by the model designation), it offers simplicity and cost-effectiveness for applications where automation is unnecessary.

7. **Long Service Life** Properly maintained, Flowserve valves are known for **extended operational lifespans**, reducing replacement frequency and maintenance costs over time.

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1. **High Initial Cost** Flowserve valves are premium products, and this specific model may be **more expensive** than generic or lesser-known brands. The cost could be a barrier for smaller operations or budget-constrained projects.

2. **Potential Overkill for Low-Stress Applications** If the valve is being used in a system with **far lower pressure and temperature demands**, its high-rated specifications may be unnecessary, leading to **unjustified upfront costs**.

3. **Maintenance Requirements** While durable, **regular maintenance (lubrication, sealing checks, and inspection)** is essential to prevent leaks or failure, especially in corrosive environments. Neglecting maintenance could lead to premature wear.

4. **Weight and Installation Complexity** The valve may be **heavier and bulkier** than standard alternatives, requiring **stronger mounting and more robust piping support**, which could complicate installation.

5. **Limited Customization Options** Unlike some specialized valves, this model may not offer **custom trims or unique features** (e.g., fire-safe designs, advanced automation) without additional modifications, which could increase costs.

6. **Potential Lead Times** Depending on availability, **ordering may require longer lead times**, especially if sourcing from Flowserve directly or authorized distributors.

7. **Actuation Dependency (If Manual)** If this is a **manual valve**, it requires **human intervention** for operation, which may not be ideal for **automated or remote-controlled systems**. An electric or pneumatic actuator would add to the cost.

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### **Conclusion and Recommendation**

The **Flowserve 4446TSW 1 " (1000 PSI, 400 F, R2)** is an **excellent choice** for applications requiring **high-pressure, high-temperature, and full-port flow performance**, such as:

- **Oil & gas refining**

- **Chemical processing plants**

- **Power generation (steam or high-pressure fluid systems)**

- **Industrial water treatment (if corrosion-resistant materials are specified)**

- **Harsh-environment piping where reliability is critical**

- Your application **requires 1000 PSI and 400 F ratings** and cannot compromise on flow efficiency (full port).

- You need a **long-term, low-maintenance solution** from a trusted brand.

- Budget constraints allow for the **premium pricing** of a Flowserve valve.

- Your system operates at **much lower pressures/temperatures**, making a **lower-rated valve** (e.g., 600 PSI, 200 F) sufficient.

- You require **automation** (electric/pneumatic actuation), which would necessitate additional costs.

- Cost is a major concern, and you can find a **reputable generic or aftermarket valve** with similar specs at a lower price (though with potential trade-offs in warranty and support).

For **high-demand industrial applications where reliability and performance are non-negotiable**, this valve is a **strong, well-supported investment**. However, for **lower-stress applications**, evaluating whether the **premium features justify the cost** is essential. Always verify the **specific trim materials** (e.g., stainless steel, alloy) to ensure compatibility with your fluid media.

Details:

May show minor imperfections but nothing that will impact performance. Item appears used and in good condition. Ball Valve, For sale is a Flowserve 11/2 4446TSW R2 Valve Series 44 1-1/2 1000PSI Max 400Deg. Will come as shown and with what is pictured.

Etch Surplus Rochester, NY, Shipping: Charged according to location.

part #: 4446tsw prices

• $70.00-$200.00

specifications valvesplumbing:

• brand: Flowserve
• mpn: 4446tsw
• part type: Valve
• housing material: Carbon Steel
• valve operation: Manual
• diameter: 1 1/2 In

seller valvesplumbing:

• # reviews: 14309
• rating: 100.0%
• city: Rochester, New York

payments valvesplumbing:

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

offer valvesplumbing:

• sold: 0
• started: April 20, 2026
• quantity: 1
• availability: In Stock
• options: Ship-to-home

shipping valvesplumbing:

• class: Standard, Expedited, One-day
• cost: $21.52
• service: FedEx Ground / FedEx Home Delivery, FedEx 2Day, FedEx Priority Overnight
• carrier: FedEx
• transit: 2-4 Days
• type: Calculated

general valvesplumbing:

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

returns valvesplumbing:

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

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