4" Weco Hammer Union Seal (Brass Insert & Buna-N) - Import | Cost-Effective Anti-Extrusion Seal

The 4" Weco Hammer Union Seal (Import) featuring a precision-machined Brass insert and Buna-N (Nitrile) elastomer is a highly economical, heavy-duty sealing solution engineered for extra-large-bore, high-volume flowline applications. Designed to fit seamlessly into standard 4-inch Weco-style hammer unions—including standard Figure 602, 1002, and 1502 profiles—this composite seal ring provides critical protection against fluid bypass and catastrophic seal blowout while offering a budget-friendly option for operations requiring frequent maintenance turnarounds on massive fluid transfer lines.

Sourced from our trusted international manufacturing partners, this "Import" line is carefully selected to deliver exceptional commercial value without compromising essential field safety on 4-inch flowlines. The core sealing element is molded from high-grade Buna-N (Nitrile / NBR), providing excellent, dependable resistance to petroleum-based fluids, water, and abrasive drilling muds. Crucially, it features an integrated, rigid Brass Anti-Extrusion Ring. In extra-large-bore lines where the internal surface area magnifies pressure forces, this non-sparking metallic backup ring structurally reinforces the elastomer lip, completely preventing it from extruding into the clearance gap of the union during extreme pressure spikes.

Ideal for cost-conscious operators seeking to balance operational budgets with high-pressure reliability, this 4" Brass/Buna Import Weco seal is the perfect choice for standard service flowline connections that handle immense fluid volumes and require dependable extrusion resistance.

Features & Benefits

• Cost-Effective Value: An economical "Import" alternative that reduces maintenance overhead for large-scale, high-volume flowline operations without sacrificing seal integrity.

• Brass Anti-Extrusion Ring: Integrated metal backing entirely prevents elastomer extrusion and blowout under the severe pressure surges and high fluid velocities typical of 4-inch lines.

• Buna-N Elastomer: Formulated from Nitrile rubber for dependable resistance to oil, gas, water, and abrasive fracturing or drilling fluids.

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

• Exact Fitment: Precision manufactured to ensure a perfect, drop-in fit for standard 4" Weco-style hammer unions, allowing for rapid in-field replacements.

Specifications & Technical Details

Applications

This 4" Brass/Buna Import Weco Seal is recommended for standard service flowline environments where cost-efficiency, massive flow volumes, and high-frequency replacement are key priorities. Typical applications include high-capacity mud circulating lines, heavy-duty cementing manifolds, large-scale water transfer systems, pump suction/discharge lines, and general well-servicing equipment requiring robust blowout protection.

Quality Assurance

While part of our highly competitive import line, these extra-large-bore seals are still subjected to strict batch-testing protocols. We verify the Buna-N durometer (hardness) and dimensionally inspect the brass anti-extrusion rings to ensure they meet the rigorous tolerance standards necessary to protect your field personnel and large-scale flowline infrastructure.

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