2" Fig 1502 Relief Valve Assembly | 15,000 PSI High-Pressure Safety Valve

The 2" Figure 1502 Relief Valve Assembly is a mission-critical safety device engineered to protect high-pressure pumping equipment, flowline manifolds, and field personnel from catastrophic overpressure events. Designed to seamlessly integrate into standard 2-inch 15M iron spreads, this heavy-duty assembly acts as a fail-safe mechanical fuse. Rated for up to 15,000 PSI Cold Working Pressure (15M CWP), the valve is calibrated to automatically "pop" open and instantly vent fluid or gas if system pressure exceeds a pre-determined, safe limit, preventing structural rupture of pipelines and wellhead equipment.

The core of this assembly is its Adjustable Spring-Loaded Mechanism (or nitrogen-charged system, depending on configuration). This allows operators to precisely set the pop-off release pressure according to the specific safety margins of their current operation, whether it be hydraulic fracturing, acidizing, or cementing. When a pressure spike—such as a screen-out or a blocked downstream valve—hits the relief valve, the internal mechanism overcomes the spring tension, rapidly discharging the excess energy and fluid away from the main line through a designated discharge port. Once the pressure normalizes, the valve automatically reseats, allowing operations to resume safely.

Constructed from premium forged alloy steel to withstand abrasive fluids and immense kinetic energy, the assembly features standard Figure 1502 hammer union connections (typically Male x Female or engineered for specific manifold tees) for fast, vibration-resistant installation. Having a reliable, precisely calibrated relief valve assembly in your high-rate pumping circuit is not just best practice—it is an absolute safety mandate.

Features & Benefits

• 15,000 PSI Working Pressure (15M): Engineered to safely contain and operate within extreme high-pressure upstream environments up to 15,000 PSI CWP.

• Instant Overpressure Relief: Automatically opens to discharge fluid when system pressure exceeds the set point, preventing dangerous iron washouts and blowouts.

• Adjustable Set Pressure: The field-adjustable mechanism allows technicians to fine-tune the pop-off threshold to match the specific pressure limits of the well program.

• Automatic Reseating: Once the critical pressure spike is vented, the internal spring forces the valve closed again, quickly restoring the system's pressure boundary.

• Rugged Forged Construction: Machined from high-strength alloy steel to absorb the severe shock, vibration, and fluid erosion associated with high-velocity emergency venting.

• Fig 1502 Hammer Unions: Ensures rapid, highly secure, and leak-free makeup into existing 2-inch high-pressure treating iron networks.

Specifications & Technical Details

Applications

This 2" Fig 1502 Relief Valve Assembly is a mandatory safety component for any high-pressure pumping operation. It is typically installed directly on high-pressure frac pump discharge fluid ends, integrated into the primary treating iron manifold before the wellhead, utilized in choke-and-kill safety loops, and deployed during acidizing or cementing jobs where sudden pressure blockages pose a severe risk to equipment and human life.

Quality Assurance

Because it is a life-saving safety device, each relief valve assembly undergoes the industry's most rigorous quality assurance testing. This includes high-pressure hydrostatic body shell testing, multiple dynamic "pop-off" tests to verify the accuracy and repeatability of the release mechanism, magnetic particle inspection (MPI) on all pressure-containing welds and forgings, and complete material traceability (MTRs) to ensure strict API and OSHA safety compliance.

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