3" Weco Hammer Union Seal (Stainless Steel & Viton) | High-Temp & Sour Service Seal Ring

The 3" Weco Hammer Union Seal featuring a precision-machined Stainless Steel insert and premium Viton® (FKM) elastomer is an elite, heavy-duty sealing solution engineered for the most severe, high-volume flowline applications. Designed to fit seamlessly into standard 3-inch Weco-style hammer unions, including the industry-standard Figure 1502, this specialized composite seal ring is the ultimate defense against fluid bypass and catastrophic failure in large-bore environments where standard rubber seals rapidly degrade.

This seal achieves its unmatched performance through a robust, dual-material composite design. The core sealing element is molded from high-grade Viton® (Fluorocarbon / FKM), a premium elastomer globally recognized for its exceptional resistance to extreme temperatures, harsh chemicals, sour gas (H2S), and corrosive petrochemical fluids. To complement the Viton, a precision-machined Stainless Steel Anti-Extrusion Ring is embedded into the seal profile. Under extreme pressure spikes and the high fluid velocities common in 3-inch flowlines, this metal backup ring acts as a rigid support structure. It entirely prevents the elastomer lip from extruding into the union's clearance gap, ensuring a tight, blowout-proof connection during critical operations.

Ideal for aggressive sour service and high-temperature fracturing or well-testing, this 3" Stainless Steel / Viton hammer union seal ensures unparalleled reliability, safety, and longevity for your critical large-bore flow control infrastructure.

Features & Benefits

• Stainless Steel Anti-Extrusion Ring: The integrated metal backing reinforces the seal structure, entirely preventing elastomer extrusion and blowout under extreme operational pressures and high flow rates.

• Premium Viton® (FKM) Elastomer: Provides unmatched resistance to high temperatures, sour gas (H2S), acidic stimulation fluids, and volatile synthetic drilling muds.

• Sour Service Ready: Specifically engineered to withstand the degrading effects of hydrogen sulfide and corrosive environments, maintaining integrity where standard elastomers become brittle and fail.

• Pressure-Energized Geometry: Utilizes line pressure to actively expand the Viton sealing lips against the union's mating surfaces, establishing a dynamic seal that strengthens as pressure increases.

• Exact Fitment: Precision manufactured to ensure a drop-in, zero-clearance fit for standard 3" Weco-style hammer unions (specifically Fig 1502 profiles).

Specifications & Technical Details

Applications

This 3" Stainless Steel / Viton Weco Seal is explicitly designed for large-bore, severe-service flowline environments. It is critical for high-capacity sour gas (H2S) wells, high-temperature fluid handling manifolds, acidizing flowlines, high-pressure choke and kill lines, severe-duty fracturing operations utilizing aggressive chemicals, and any critical large-diameter infrastructure requiring maximum chemical and extrusion resistance.

Quality Assurance

Every composite hammer union seal undergoes rigorous quality control testing. The Viton elastomer is tested for correct chemical composition and durometer accuracy, while the stainless steel inserts are dimensionally inspected for exact tolerances. The final bonded assembly is evaluated to guarantee flawless cohesion between the metal ring and the elastomer, ensuring maximum reliability in high-stress field conditions.

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