4" Weco Hammer Union Seal (Viton / Green) | High-Temp & Sour Service Elastomer

The 4" Weco Hammer Union Seal manufactured from premium Green Viton® (FKM) is a specialized, heavy-duty sealing solution engineered for severe-service, extra-large-bore oilfield environments that demand extreme temperature and chemical resistance. Designed for a precise, drop-in fit into standard 4-inch Weco-style hammer unions—including standard Figure 602, 1002, and 1502 profiles—this high-performance seal acts as an impenetrable pressure barrier against volatile, high-volume, and corrosive fluids.

A critical feature of this extra-large-bore seal is its industry-standard Green color-coding. In fast-paced, high-stress field operations involving massive 4-inch flowlines, visually distinguishing between elastomer materials is paramount for site safety. The bright green color allows operators and inventory managers to instantly identify the seal as severe-service Viton (FKM), entirely preventing accidental swapping with standard black Buna-N seals in aggressive environments where inferior materials would rapidly degrade and lead to catastrophic leaks.

Molded from heavy-duty Viton® (Fluorocarbon / FKM), this seal provides unparalleled resistance to elevated temperatures, synthetic drilling muds, sour gas (H2S), and aggressive completion chemicals. Combined with a highly efficient pressure-energized lip design that actively expands against the union’s mating surfaces as line pressure increases, this green Viton seal guarantees a blowout-proof connection under the most demanding, large-scale well-servicing conditions.

Features & Benefits

• Green Color-Coding: High-visibility green elastomer ensures rapid, error-free visual identification in the field and warehouse, confirming the use of severe-service materials for critical high-volume flowlines.

• Premium Viton® (FKM) Elastomer: Delivers maximum resistance to high temperatures, volatile petrochemicals, and acidic stimulation fluids encountered in heavy-duty operations.

• Sour Service Ready: Formulated to withstand the degrading, embrittling effects of hydrogen sulfide (H2S), making it an essential component for large-bore sour gas environments.

• Pressure-Energized Geometry: Utilizes massive internal flowline pressure to actively push the sealing lips outward against the metal union faces, strengthening the dynamic seal as high-volume flow increases.

• Extra-Large Bore Fitment: Manufactured to strict dimensional tolerances to ensure a seamless fit for standard 4" Weco-style hammer unions (including Fig 602, 1002, and 1502 profiles).

Specifications & Technical Details

Applications

The 4" Green Viton Weco Seal is explicitly designated for severe-service, large-scale flowline systems. It is an essential component for high-capacity sour gas (H2S) well servicing, heavy-duty high-temperature pump discharge lines, aggressive acidizing manifolds, severe-duty fracturing operations utilizing caustic chemicals, and any critical large-diameter infrastructure where standard elastomers are prone to chemical attack or thermal degradation.

Quality Assurance

Each batch of our 4-inch Green Viton union seals undergoes rigorous quality control to verify dimensional accuracy, correct durometer (hardness), and proper FKM chemical composition. The colorants used are tested for stability to ensure they do not compromise the elastomer's structural integrity, guaranteeing maximum reliability and field safety during high-stress operations.

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