Key Features & Advantages

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1. Precision Geometry: Our lip-style design ensures an energizing seal under low pressure while maintaining structural stability under high-pressure spikes.

2. Anti-Extrusion Design: Available with integrated brass or stainless steel backup rings to prevent seal migration and extrusion in high-pressure "Fig 1502" or "Fig 2002" unions.

3. Chemical Compatibility: Resistant to heavy brines, CO2, H2S, and various fracking fluids.

4. Interchangeability: Manufactured to strict tolerance standards, ensuring a perfect fit with standard hammer union male and female subs from various global manufacturers.

5. Durable Sealing Surface: Optimized hardness (Durometer 80-95 Shore A) to balance flexibility and pressure resistance.

    

Application Environments

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Our Hammer Union Seals are the preferred choice for:

• Hydraulic Fracturing (Fracking): Handling high-velocity proppant and chemicals.

• Well Testing: Reliable performance during pressure variations.

• Acidizing & Cementing: Resisting corrosive media and abrasive slurries.

• Manifold Systems: Ensuring leak-free connections in high-pressure distribution lines.

   

Size Chart & Compatibility

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We supply replacement seals for all standard pipe sizes:

• 1", 1-1/2", 2", 3", 4"

• Standard Service: Fig 100, 200, 206, 211, 400, 602, 1002.

• Sour Gas / High Pressure: Fig 1502, 2002, 2202.

   

FAQ: Critical Selection Guide & Troubleshooting

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1. How do I choose between NBR and HNBR for my hammer union?

While NBR is suitable for standard water and oil service, HNBR is highly recommended if your application involves higher temperatures (above 100°C) or exposure to H2S (Sour Gas). HNBR offers significantly better tensile strength and tear resistance, making it more durable for frequent makeup and breakout of unions.

2. Why do my seals fail prematurely through "extrusion"?

Extrusion usually occurs when the pressure exceeds the material’s limit or when the gap between the union subs is too wide. For high-pressure applications (10,000 PSI+), we recommend seals with a Stainless Steel or Brass Anti-Extrusion Ring. This metal reinforcement keeps the rubber in place under extreme stress.

3. Are your seals compatible with H2S (Sour Gas) service?

Yes. For Sour Gas environments, we provide specific FKM or HNBR compounds that meet NACE MR0175 standards. These materials are formulated to resist chemical degradation caused by hydrogen sulfide.

4. What is the shelf life of these rubber seals?

In proper storage conditions (cool, dry, away from direct sunlight and ozone), NBR seals typically have a shelf life of 5–7 years, while FKM can last over 10 years. We recommend rotating stock and checking for brittleness before installation.

5. Can I use your seals in cold weather environments?

Standard NBR may become brittle in extreme cold. For Arctic or sub-zero operations, we offer Low-Temperature NBR/HNBR variants that maintain elasticity down to -45°C or lower.

6. Do you support custom sizing or OEM branding?

Absolutely. As a direct manufacturer, we can produce seals based on your specific drawings or samples. We also offer private labeling and custom packaging for distributors.

Why Partner With Us?

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• Factory Direct Pricing: No middlemen, ensuring competitive rates for bulk orders.

• Quality Assurance: Every batch undergoes rigorous hardness, tensile, and pressure testing.

• Rapid Delivery: Large inventory of standard sizes (2" & 3" Fig 1502) ready for immediate shipment.

• Technical Support: Our engineers can help you select the exact elastomer for your specific well-site conditions.

   

Company and factory

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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.