ANDERSON GREENWOOD 81PS1-68-8L Relief Valve 81PS1/68-8L 374GPM 3100PSI 3/4IN

( Brand: Anderson Greenwood ), ( Manufacturer Part Number: 81PS1/68-8L ), ( Part Type: Valve ), ( Flow Capacity: 374 Gpm ), ( Set Pressure: 3100 Psi ), ( Size: 3/4 In ), ( Mounting Type: Threaded ), ( Reference Sku: 1766094 ), ( Product Condition: Used Excellent )

Review ANDERSON GREENWOOD 81ps1/68-8l Relief Valve 374gpm 3100psi 3/4in

The **Anderson Greenwood 81PS1/68-8L Relief Valve** is a high-performance, precision-engineered pressure relief device designed to safeguard hydraulic systems operating under extreme conditions, ensuring both reliability and longevity. Built with Anderson Greenwood s signature durability, this valve is engineered to handle demanding applications where fluid pressures can surge unpredictably, making it an indispensable component in heavy-duty hydraulic systems such as industrial machinery, mining equipment, marine systems, and high-pressure hydraulic presses. With a robust **3/4-inch (19mm) port size**, it efficiently manages flow rates up to **374 gallons per minute (gpm)**, allowing it to handle substantial fluid volumes without compromising performance. The valve is rated for a **maximum working pressure of 3,100 psi (210 bar)**, making it ideal for systems where high-pressure stability is critical, such as in hydraulic cylinders, pumps, or accumulators where excessive pressure could lead to catastrophic failure.

Constructed from **high-grade steel and reinforced components**, the 81PS1/68-8L is built to withstand the harshest environments, including exposure to contaminants, temperature fluctuations, and continuous cyclic loading. Its **pilot-operated design** ensures precise pressure regulation, minimizing pressure spikes while maintaining system efficiency. The valve features a **spring-loaded mechanism** that provides consistent and repeatable relief pressure, reducing the risk of system overload and extending the life of connected hydraulic components. Weighing **374 grams**, it strikes a balance between compactness and structural integrity, making it suitable for installations where space is limited but performance demands are high.

The **81PS1/68-8L** incorporates advanced sealing technology to prevent fluid leakage, ensuring operational efficiency and reducing maintenance downtime. Its **adjustable pressure setting** allows for customization to match specific system requirements, providing flexibility in applications where pressure thresholds may vary. Whether integrated into a mobile hydraulic system, a stationary industrial setup, or a specialized marine application, this relief valve delivers uncompromising protection against pressure surges, contributing to overall system safety and operational longevity. Built to meet stringent industry standards, it exemplifies Anderson Greenwood s commitment to engineering solutions that combine robustness with precision, making it a trusted choice for engineers and operators seeking dependable hydraulic protection.

### **Pros and Cons of buying a Anderson Greenwood 81PS1/68-8L Relief Valve (374 GPM, 3100 PSI, 3/4")**

1. **High Flow Rate (374 GPM)** Suitable for demanding hydraulic systems requiring significant fluid displacement, such as heavy-duty machinery, industrial presses, or high-pressure applications.

2. **High Pressure Rating (3100 PSI)** Capable of handling extreme pressure conditions, making it ideal for applications where system integrity under high stress is critical.

3. **Durable Construction** Likely built with robust materials (e.g., hardened steel components, sealed internals) to resist wear, corrosion, and fatigue over prolonged use.

4. **Precision Engineering** Designed for accurate pressure regulation, minimizing system fluctuations and ensuring consistent performance in critical applications.

5. **Compatibility with 3/4" Porting** Fits standard hydraulic lines, reducing the need for custom fittings or adapters in most setups.

6. **Brand Reputation** Anderson Greenwood is a well-known manufacturer in the hydraulic industry, suggesting reliability and availability of spare parts.

7. **Adjustable or Fixed Setting** Depending on the model variant, it may offer tunability for different pressure requirements, increasing versatility.

8. **Potential for Long Service Life** Properly maintained, such a valve can last for years in industrial environments, reducing replacement costs.

1. **High Cost** As a premium hydraulic component, the price may be significantly higher than generic or lower-end alternatives, especially for smaller-scale applications.

2. **Specialized Application** Overkill for low-pressure or low-flow systems, leading to unnecessary investment if the system doesn t require such high performance.

3. **Maintenance Requirements** High-pressure valves may demand regular inspection, cleaning, and lubrication to prevent leaks or failure, adding operational overhead.

4. **Installation Complexity** Requires proper alignment, sealing, and hydraulic line sizing, which may necessitate professional installation to avoid damage or inefficiency.

5. **Weight (374g)** While not excessively heavy, it is heavier than smaller valves, which could complicate handling or storage in space-constrained environments.

6. **Potential for Overkill in Some Systems** If the application rarely approaches 3100 PSI or 374 GPM, the valve may be unnecessarily robust, leading to wasted performance.

7. **Limited Availability of Replacement Parts** While Anderson Greenwood is reputable, finding exact replacements or compatible parts may be harder than with more widely used brands.

8. **Noise and Vibration** High-pressure relief valves can generate noise and mechanical stress, which may require additional damping or isolation in sensitive environments.

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The **Anderson Greenwood 81PS1/68-8L relief valve** is an excellent choice for **high-performance hydraulic systems** where reliability, precision, and extreme pressure handling are paramount. It excels in industrial, heavy machinery, or high-demand applications but may be **overkill for lighter-duty or low-pressure systems**. The trade-off between performance and cost must be carefully considered if the application genuinely requires its specifications, the investment is justified. However, for less demanding setups, a lower-cost alternative might suffice without sacrificing functionality.

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- You operate a system requiring **3100 PSI or higher** and **374 GPM or more**.

- Your application involves **high-stress industrial machinery, presses, or critical hydraulic systems**.

- You prioritize **long-term durability and brand reliability** over cost savings.

- You have the **space, expertise, and maintenance resources** to handle its requirements.

- Your system operates at **lower pressures or flow rates**, making this valve unnecessarily expensive.

- You lack the **technical knowledge or tools** to install/maintain it properly.

- Budget constraints make a **mid-range or generic relief valve** a more practical choice.

- Noise, vibration, or installation complexity are significant concerns.

For most **heavy-duty industrial users**, this valve is a strong, high-quality investment. For **smaller or less demanding applications**, exploring other models (e.g., lower-pressure or flow-rated relief valves) could provide better value. Always verify compatibility with your existing hydraulic system before purchasing.

Details:

Pressure Regulator Valves. Relief Valves.

part #: 81ps1688l prices

• $165.99-$725.00

specifications valvesplumbing:

• brand: Anderson Greenwood
• mpn: 81ps1/68-8l
• part type: Valve
• flow capacity: 374 Gpm
• set pressure: 3100 Psi
• size: 3/4 In
• mounting type: Threaded
• reference sku: 1766094
• product condition: Used Excellent

shipping valvesplumbing:

• type: Fixed
• cost: $0.00
• service: Standard, Expedited, Overnight
• transit: 6-6 Days
• class: Standard, Expedited, One-day

seller valvesplumbing:

• city: Delta, Ohio
• # reviews: 128285
• rating: 100.0%

returns valvesplumbing:

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

general valvesplumbing:

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

offer valvesplumbing:

• best offers: True
• quantity: 1
• availability: In Stock
• sold: 0
• options: Ship-to-home
• started: May 6, 2026

payments valvesplumbing:

• credit card: Mastercard
• other
• wallet: Paypal

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