Nitrile (NBR) Hammer Union Seals with Brass Back-up Rings
One: Product Overview and Functional Design
The Nitrile (NBR) Hammer Union Seal with a Brass Back-up Ring is a critical sealing component designed for high pressure fluid handling in the oil and gas industry. These seals are specifically engineered to provide a robust, leak-free connection in hammer union assemblies. The primary sealing element is made from high quality Nitrile rubber, which offers excellent resistance to petroleum-based fluids. To enhance performance under high pressure, a brass back-up ring is integrated into the seal design. This brass ring serves as an anti-extrusion device, preventing the elastomer from being forced into the clearance gaps of the union connection, thereby significantly extending the service life of the seal and ensuring operational safety during high intensity pumping operations.
Two: Material Characteristics and Advantages
The combination of Nitrile (NBR) and Brass is a industry standard for many oilfield applications due to its cost effectiveness and reliable physical properties.
Nitrile Rubber (NBR) Properties: Nitrile is the most widely used elastomer in the oil industry. It provides excellent resistance to hydraulic fluids, seal oils, and water. It is known for its high tensile strength and superior resistance to compression set.
Brass Back-up Ring Properties: Brass is selected for the reinforcement ring because it is a non-sparking material, which is vital for safety in volatile oilfield environments. It is hard enough to prevent the extrusion of the rubber seal under high pressure but soft enough not to damage the precision machined surfaces of the hammer union subs.
Three: Product Specifications Table
| Product name |
Hammer union seal/Hammer union lip seal ring |
| Primary Material |
Nitrile (NBR / Buna-N) |
| Reinforcement Material |
Brass (Non-sparking) |
| Available Sizes |
1 inch, 2 inch, 3 inch, 4 inch |
| Standard Figures |
Compatible with Fig 602, Fig 1002, Fig 1502 |
| Hardness |
80 Shore A to 90 Shore A |
Four: Operating Performance Parameters Table
| Maximum Working Pressure |
Up to 15,000 PSI (Depending on Figure Type) |
| Low Temperature Limit |
-30 degrees Fahrenheit (-34 degrees Celsius) |
| High Temperature Limit |
+250 degrees Fahrenheit (+121 degrees Celsius) |
| Service Environment |
Standard Oil and Gas Service |
| Media Suitability |
Crude oil, water, drilling mud, and petroleum-based fluids |
Five: Industry Application Range
These hammer union seals are utilized across various sectors of the energy industry where secure high pressure piping is required.
1. Drilling and Mud Services
In drilling operations, these seals are used in mud pump manifolds and suction lines. The NBR material handles the abrasive nature of drilling fluids while the brass ring maintains the seal against the constant vibration and pressure of the pumps.
2. Well Cementing and Acidizing
During cementing, the seals ensure that high pressure slurries are contained within the flowlines. The Nitrile material remains stable when exposed to common cementing additives and water-based fluids.
3. Hydraulic Fracturing (Fracking)
For water-based fracking operations, these seals provide a reliable connection for the manifold trailers and discharge lines. The brass ring is essential here to prevent seal failure during the high pressure cycles characteristic of stimulation work.
4. Water and Fluid Transfer
They are also widely used in general water transfer lines and low to medium pressure oil lines where a durable and easy to replace sealing solution is needed.
Six: Why Choose Our Nitrile Hammer Union Seals
As a dedicated manufacturer, we focus on the precision of our molding process to ensure every Nitrile (NBR) Hammer Union Seal meets exact dimensional tolerances. Our brass rings are perfectly seated to ensure consistent anti-extrusion protection. By choosing our seals, operators benefit from reduced maintenance downtime and a lower total cost of ownership. These seals provide a dependable barrier against leaks, protecting both your equipment and the environment from fluid discharge. We ensure that our materials are sourced to meet international quality standards, providing peace of mind for high pressure applications worldwide.
Seven: Company and factory introduction
Established in 2013 within the Shanghai Free Trade Zone, Qinuo is a high-tech enterprise specializing in rubber seal manufacturing for the Oil & Gas sector. We integrate R&D, production, and sales under our core philosophy: "Quality for Survival, Innovation for Development." This commitment has earned us recognition across global markets, where we currently promote our Royal Way and SHQN brands in the energy industry.
Qinuo provides professional design and production services for rubber parts, plastic components, and machined parts. Our solutions serve diverse sectors including oil & gas, automotive, home appliances, and industrial equipment. Guided by our principles of "High Quality, High Professionalism, High Efficiency," our dedicated team ensures excellence at every stage.
We operate two wholly-owned factories in Nantong City—strategically located just one hour from Shanghai Pudong Airport and Shanghai Port. Equipped with over 30 rubber vulcanization presses and supporting machinery, we produce more than 20 types of rubber seals and related products. Our monthly production capacity exceeds 20 tons (approximately 40,000 lbs), and we continue to expand rapidly.
Operating under a comprehensive ISO9001-based quality management system, we export to over 100 countries including the USA, Canada, UK, Germany, Finland, and Australia. We're confident in our ability to meet your requirements and look forward to a productive partnership.
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