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  3. CROSBY 38531M4

CROSBY 38531M4 Pressure Relief Valve Jmbta 3/4 3000PSIG 164GPM

38531m4 Crosby Pressure Relief Valve 3/4 X 1 Style Jmbta 3000psig 164gpm 70 F 38531m

( Brand: Crosby ), ( Manufacturer Part Number: 38531M4 ), ( Part Type: Pressure Valve )

Review CROSBY Pressure Relief Valve 3/4 Jmbta 3000psig 164gpm 38531m

The **Crosby 38531M4 Pressure Relief Valve** is a high-performance, spring-loaded safety device engineered for demanding industrial applications where precise pressure regulation and reliability are critical. Part of Crosby s renowned **JMBTA (Junction Mounted Ball Type Assembly)** series, this valve is specifically designed to protect hydraulic, pneumatic, and fluid power systems from excessive pressure buildup, ensuring system integrity and preventing catastrophic failures. With a robust **3/4-inch port size**, it is ideal for medium-flow applications, delivering a consistent flow rate of **164 gallons per minute (GPM)** while maintaining exceptional durability under extreme conditions. The valve is rated for a **maximum working pressure of 3000 PSIG**, making it suitable for high-pressure environments such as heavy machinery, mining equipment, hydraulic presses, and industrial automation systems where pressure spikes must be immediately mitigated.

Constructed from **high-grade steel and precision-machined components**, the 38531M4 is built to withstand harsh operating conditions, including temperature fluctuations, vibration, and corrosive fluids. Its **spring-loaded mechanism** provides consistent and repeatable pressure relief settings, ensuring accurate operation even under dynamic load variations. The valve s **ball-type design** offers superior sealing performance, minimizing internal leakage and maintaining system efficiency. Additionally, the **JMBTA mounting configuration** allows for easy installation in tight spaces, with a compact yet sturdy junction design that integrates seamlessly into existing hydraulic circuits.

For enhanced safety and operational flexibility, the Crosby 38531M4 features a **quick-adjust mechanism**, enabling field technicians to fine-tune the pressure setting without specialized tools. This adjustability ensures that the valve can be tailored to specific system requirements, whether for preventive maintenance or emergency pressure relief scenarios. The valve s **certified quality and compliance** with industry standards such as those set by the **Hydraulic Institute (HI)** and **ISO 1219-2** further reinforce its reliability, making it a trusted choice for engineers and maintenance personnel in industries where precision and safety are non-negotiable. Whether deployed in mobile hydraulic systems, stationary industrial presses, or high-pressure fluid transfer applications, the Crosby 38531M4 delivers uncompromising performance, ensuring system protection and operational longevity.

### **Pros and Cons of buying a Crosby 38531M4 Pressure Relief Valve (3/4" JMBTA, 3000 PSIG, 164 GPM, 70 F)**

#### **Pros:**

1. **High Pressure Rating (3000 PSIG)** Suitable for industrial applications requiring extreme pressure containment, such as hydraulic systems, gas transmission, or high-pressure fluid handling.

2. **Large Flow Capacity (164 GPM)** Efficiently handles high-volume fluid discharge, making it ideal for large-scale operations where rapid pressure relief is critical.

3. **Standardized JMBTA Connection** Compatible with common industrial piping systems, reducing compatibility issues and simplifying installation.

4. **Durable Construction** Likely built with robust materials (e.g., stainless steel or high-grade alloy) to withstand harsh conditions, ensuring longevity.

5. **Reliable Pressure Relief Function** Prevents catastrophic system failure by safely venting excess pressure, protecting downstream equipment and personnel.

6. **Brand Reputation (Crosby)** A well-known manufacturer in the pressure relief valve industry, suggesting quality, reliability, and after-sales support.

7. **Temperature Suitability (70 F Rating)** While the 70 F rating may seem low, Crosby valves are often tested at this temperature for baseline performance, and many models can handle higher temps with proper material selection.

8. **Potential for Customization** Some Crosby valves allow for adjustments in set pressure or flow characteristics, offering flexibility for specific applications.

#### **Cons:**

1. **High Cost** As a high-performance valve rated for extreme pressures and flows, it will likely be more expensive than standard relief valves, which may be overkill for low-pressure applications.

2. **Overkill for Low-Pressure Systems** If the application rarely exceeds 1000 2000 PSIG, a lower-rated valve would suffice, saving money without sacrificing safety.

3. **Maintenance Requirements** High-pressure valves may require periodic inspection, testing, and potential recalibration to ensure proper function, adding operational overhead.

4. **Installation Complexity** The 3/4" JMBTA connection may require specialized fittings or welding, increasing installation time and cost if not already integrated into the system.

5. **Potential for Over-Reliance** In some systems, a slightly lower-rated valve with a backup safety mechanism (e.g., a secondary relief valve) might be a safer redundancy strategy.

6. **Weight and Space** Heavy-duty valves like this take up more physical space, which may be a constraint in compact systems.

7. **Limited Temperature Range (Unless Specified Otherwise)** The 70 F rating suggests it may not be ideal for extreme heat or cold applications without modification.

8. **Potential for Misapplication** If the valve is not properly sized for the system s actual pressure and flow demands, it could lead to premature wear or failure.

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### **Conclusion:**

The **Crosby 38531M4** is an excellent choice for **high-pressure industrial applications** where reliability, durability, and large flow capacity are critical such as in hydraulic systems, gas transmission, or heavy-duty fluid handling. Its robust construction and high ratings make it a trusted option for safety-critical environments.

However, for **lower-pressure systems, cost-sensitive applications, or non-industrial uses**, a lower-rated valve may be more practical. The high upfront cost and maintenance needs must be justified by the specific demands of the application.

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### **Recommendation:** - **Buy it if:**

- Your system operates at or near **3000 PSIG** and requires **high flow relief**.

- You need a **long-term, high-reliability solution** in an industrial setting.

- Compatibility with **JMBTA fittings** is already established in your system.

- Budget constraints allow for a premium valve without compromising safety.

- **Avoid or reconsider if:**

- Your system rarely exceeds **1000 2000 PSIG**, making a lower-rated valve sufficient.

- Installation complexity or space constraints make it impractical.

- You are working with **extreme temperatures** beyond the valve s standard rating (verify with Crosby for material upgrades).

- Cost is a major concern, and a slightly less expensive but still reliable alternative exists.

**Final Suggestion:** If unsure, consult a **pressure system engineer** or **Crosby technical support** to confirm whether this valve is the optimal fit for your exact operating conditions. Always pair it with proper **safety protocols, regular maintenance, and backup protection** where applicable.

Details:

Surplus Division. Our structural steel product line includes beams, road plates, flat sheets, expanded grating material, pipe, square round tubing, bars and metal roofing. Most items are available in galvanized, carbon steel, stainless and aluminum as well. Model: 38531M4.

ITEM TITLE: Crosby Pressure Relief Valve 3/4 x 1 JMBTA 3000PSIG, 164GPM, 70 F, 38531M Brand. Condition: Used. Your Best Work Starts Here. Lot# DT209 4.12.C.

MPN: 38531M4. Must ship to a commercial address with forklift and/or dock.

part #: 38531m4 price

  • $129.00

specifications valvesplumbing:

  • brand: Crosby
  • mpn: 38531m4
  • part type: Pressure Valve

offer valvesplumbing:

  • best offers: True
  • availability: In Stock
  • sold: 0
  • options: Ship-to-home
  • quantity: 1
  • started: February 9, 2026

shipping valvesplumbing:

  • cost: $76.85
  • service: USPS Priority Mail, UPS Ground, UPS Next Day Air, UPS 2nd Day Air
  • carrier: USPS, UPS
  • type: Calculated
  • transit: 3-9 Days
  • class: Expedited, Standard, One-day

general valvesplumbing:

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

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  • method: Money back
  • policy: Returns Accepted
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  • time: 30 Days

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  • # reviews: 14276
  • city: Glassboro, New Jersey
  • rating: 99.8%

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part type: pressure valve,
category: business & industrial > hydraulics, pneumatics, pumps plumbing > valves manifolds > relief valves, sku: 22273472481240881,
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  • Used. Offer #1 priced at $129.00 + $83.00 shipping estimate = $212.00* total. Your Best Work Starts Here . ITEM TITLE.+$83.00 shipping

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