4" Weco Hammer Union Seal (Buna-N) | Standard Service Elastomer Seal Ring

The 4" Weco Hammer Union Seal manufactured from premium Buna-N (Nitrile) is an essential replacement component engineered to ensure a secure, leak-free connection in extra-large-bore, high-volume flowline assemblies. Designed to fit precisely into standard 4-inch Weco-style hammer unions—including standard Figure 602, 1002, and 1502 profiles—this heavy-duty elastomer seal ring acts as the primary pressure barrier between the male and female subs, preventing fluid bypass and safeguarding the integrity of your large-scale flow control systems.

Constructed from high-grade Buna-N (Nitrile / NBR), this seal represents the reliable industry standard for general-purpose oilfield applications handling massive fluid volumes. Buna-N offers exceptional resistance to petroleum-based oils, synthetic lubricants, water, and abrasive drilling muds. The seal features a highly effective lip design that is pressure-energized; as internal line pressure increases, the lips of the seal are actively forced outward against the metal mating surfaces of the union. This creates a dynamic, blowout-proof barrier that tightens and secures the connection even under the severe vibration and massive flow rates common in 4-inch lines.

Ideal for standard service environments, this 4" hammer union seal provides excellent extrusion resistance and durability, ensuring your heavy-duty flowline equipment operates safely and efficiently during high-capacity fluid transfer, mud circulation, and cementing operations.

Features & Benefits

• Pressure-Energized Lip Design: Utilizes massive internal flowline pressure to actively press the seal against the union's metal surfaces, creating a dynamic barrier that strengthens as flow and pressure increase.

• Premium Buna-N Material: Formulated from high-quality Nitrile rubber, providing superior, cost-effective resistance to oil, gas, water, and abrasive drilling fluids.

• Extra-Large Bore Reliability: Engineered specifically for standard oilfield operations utilizing 4-inch infrastructure, offering an excellent balance of tensile strength and abrasion resistance.

• Precision Fit: Manufactured to exact tolerances to ensure seamless, drop-in compatibility with standard 4" Weco-style hammer unions (including Fig 602, 1002, and 1502 profiles).

• Cost-Effective Maintenance: Allows for rapid, in-field replacement of worn seals, maximizing uptime for large-scale flowline assemblies without the need for full structural replacement.

Specifications & Technical Details

Applications

The 4" Buna-N Weco Seal is a staple consumable for extra-large-bore flowline maintenance. It is widely used in standard-service applications involving high-capacity mud circulating lines, heavy-duty cementing manifolds, large-scale water transfer systems, pump suction/discharge lines, and general high-volume well-servicing equipment requiring reliable, rapid make-up connections.

Quality Assurance

Each batch of our 4-inch Buna-N union seals undergoes strict quality control checks to verify dimensional accuracy, material durometer (hardness), and structural integrity. This ensures every seal delivers consistent, reliable performance in demanding, high-volume oilfield conditions and resists premature wear under massive flow rates.

Request a Quote

📞 +1 405 666 5011

📧 seo@blazess.com