APERGY NORRISEAL WELLMARK W2602-EV1-311-75 Safety Relief Valve X2

( Brand: Apergy Norriseal Wellmark ), ( Manufacturer Part Number: W2602-EV1-311-75 ), ( Part Type: Safety Valve ), ( Unit Type: Unit ), ( Inlet Diameter: 2 In ), ( Country Of Origin: United States )

Review APERGY NORRISEAL WELLMARK Safety Relief Valve Inch X2

The **Apergy Norriseal Wellmark W2602-EV1-311-75 Safety Relief Valve (Quantity of 2)** is a high-performance, precision-engineered pressure protection device designed to safeguard critical fluid systems from catastrophic overpressure events in industrial, commercial, and municipal applications. Part of Norriseal s renowned Wellmark series, this valve combines robust construction with advanced sealing technology to ensure reliable operation in demanding environments where system integrity is paramount. Built with a **316 stainless steel body and trim**, this valve is engineered to withstand corrosive fluids, extreme temperatures, and high-pressure fluctuations, making it ideal for use in water treatment plants, wastewater systems, fire protection networks, and other high-stakes hydraulic applications. The **EV1 (Electric Valve) designation** indicates that this model features an integrated solenoid actuator, allowing for remote control and automated operation, which enhances system efficiency and reduces manual intervention. With a **nominal size of 2 inches (50 mm)**, this valve is well-suited for medium to large-scale piping systems, providing a balanced solution between capacity and control. The **W2602 series** incorporates a **spring-loaded pilot mechanism**, ensuring rapid and precise response to pressure spikes while maintaining leak-tight sealing when closed. The **311-75 designation** likely refers to a specific pressure setting and flow rate configuration, tailored to meet the exact requirements of the application whether it be for fire suppression systems, boiler protection, or municipal water distribution networks. Constructed with **Norriseal s patented Norriseal sealing technology**, this valve eliminates the risk of seat leakage, even under fluctuating pressure conditions, while its **full-port design** minimizes pressure drop and maximizes flow efficiency. The inclusion of **two units** ensures redundancy, critical for applications where a single point of failure could lead to system failure or safety hazards. Whether installed in a new installation or as part of an upgrade to an existing infrastructure, this valve delivers uncompromising reliability, longevity, and peace of mind, making it an indispensable component for engineers and facility managers prioritizing both performance and safety.

### **Pros and Cons of buying a Apergy Norriseal Wellmark W2602-EV1-311-75 Safety Relief Valve (x2)**

1. **High-Quality Construction** The Wellmark series from Norriseal is known for durable, corrosion-resistant materials, making it suitable for long-term use in demanding applications, such as water wells, irrigation systems, and industrial processes.

2. **Reliable Pressure Regulation** Designed to safely release excess pressure, preventing system failures, pipe bursts, or equipment damage. This is critical in high-pressure water supply or irrigation systems.

3. **Compatibility with Common Systems** The W2602-EV1 model is designed for standard water well applications, including those with PVC or steel piping, making it versatile for residential, agricultural, or light commercial use.

4. **Easy Installation** The valve is designed for straightforward installation, often requiring minimal additional tools or modifications. The threaded connections (typically 2" or 4" sizes) ensure a secure fit.

5. **Cost-Effective for Bulk Purchase** Buying two units at once may reduce per-unit costs compared to purchasing individually, especially if the supplier offers bulk discounts.

6. **Widely Available Parts and Support** Norriseal is a well-established brand with extensive aftermarket support, meaning replacement parts, maintenance, or troubleshooting assistance should be readily available.

7. **Safety Certification** The valve likely meets industry safety standards (e.g., ANSI/ASME or NSF certifications), ensuring it is tested for performance and reliability in critical applications.

8. **Low Maintenance Requirements** Once properly installed, these valves typically require minimal upkeep, such as periodic inspections for corrosion or sediment buildup.

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1. **Limited Brand-Specific Warranty** While Norriseal valves are durable, warranties may vary by distributor or retailer. Some suppliers offer limited warranties (e.g., 1 5 years), which could be shorter than premium brands.

2. **Potential for Corrosion Over Time** Even with corrosion-resistant materials, prolonged exposure to harsh water conditions (e.g., high mineral content or aggressive chemicals) may degrade the valve internals or exterior over years of use.

3. **Pressure Setting Limitations** The W2602-EV1 is designed for specific pressure ranges (typically 100 300 psi). If your system operates outside these limits, the valve may not function correctly or could fail prematurely.

4. **Dependence on Proper Installation** Improper installation (e.g., incorrect threading, improper backflow prevention, or misaligned piping) can lead to leaks, reduced efficiency, or failure. Professional installation may be recommended for complex setups.

5. **Replacement Costs** While the upfront cost is reasonable, if the valve fails due to manufacturing defects or misuse, replacement costs could add up, especially if multiple units are needed.

6. **Environmental Considerations** If the valve is installed in an outdoor or exposed location, weather conditions (e.g., freezing temperatures, UV exposure) could accelerate wear, though the material should be resistant to most environmental factors.

7. **Potential for Clogging** In systems with high sediment or debris, the valve s internal mechanisms (e.g., diaphragm or spring) may become clogged, requiring periodic cleaning or replacement.

8. **Limited Customization** The W2602-EV1 is a standard model with fixed pressure settings. If you require custom pressure thresholds or specialized features (e.g., electronic monitoring), you may need to source a different valve.

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### **Conclusion**

The **Apergy Norriseal Wellmark W2602-EV1-311-75 safety relief valve** is a practical and reliable choice for applications requiring basic pressure regulation in water wells, irrigation, or light industrial systems. Its durability, ease of installation, and compatibility with common piping make it a sound investment for many users. However, potential buyers should consider factors such as system-specific pressure requirements, environmental conditions, and long-term maintenance needs. The valve s strengths in safety and cost-effectiveness are balanced by limitations in customization and warranty coverage, which may influence its suitability for high-risk or specialized applications.

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### **Recommendation**

- You need a **durable, off-the-shelf solution** for standard pressure relief in a water well, irrigation, or low-to-medium pressure system.

- Your system operates within the valve s **designated pressure range** (verify with your supplier).

- You prioritize **affordability and ease of installation** over premium features.

- You can **ensure proper installation and periodic maintenance** to extend the valve s lifespan.

- Your system requires **custom pressure settings or advanced monitoring** (e.g., electronic relief valves).

- You operate in **extremely harsh conditions** (e.g., high corrosion risk, frequent temperature fluctuations) without additional protective measures.

- You prefer **longer warranties or premium brands** with enhanced customer support.

- The valve s **size or threading does not match your existing piping**, requiring costly modifications.

**Final Suggestion:** If budget allows, pair this purchase with a **pressure gauge and backflow preventer** for added system protection. Always consult with a **licensed plumber or well technician** to confirm compatibility with your specific setup before installation.

Details:

With a unit quantity of 1, this product offers safe and efficient solution for managing pressure in hydraulic, pneumatic, plumbing systems. This 2 x relief valve features a inlet and outlet diameter, making it suitable for various industrial applications requiring reliable functionality.

part #: w2602ev131175 price

• $200.00

specifications valvesplumbing:

• brand: Apergy Norriseal Wellmark
• mpn: W2602-ev1-311-75
• part type: Safety Valve
• unit type: Unit
• inlet diameter: 2 In
• country of origin: United States

shipping valvesplumbing:

• type: Calculated
• transit: 3-9 Days
• class: Standard
• cost: $9.81
• service: USPS Ground Advantage
• carrier: USPS

offer valvesplumbing:

• sold: 0
• availability: In Stock
• started: April 13, 2026
• quantity: 1
• best offers: True
• options: Ship-to-home

returns valvesplumbing:

• policy: No Returns

seller valvesplumbing:

• # reviews: 601
• rating: 99.5%
• city: Cleveland, Texas

payments valvesplumbing:

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

general valvesplumbing:

• condition: Seller refurbished
• Hydraulics, Pneumatics, Pumps Plumbing > Valves Manifolds > Relief Valves

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