What Are Hammer Union Seals?
Hammer Union Seals are essential static seals used in High-Pressure hammer union-style piping systems, predominantly in the Oil and Gas Industry. These seals play a crucial role in preventing leaks and maintaining system integrity under extreme conditions. Hammer unions, which connect pipes or hoses in High-Pressure environments, require robust Sealing Solutions that can withstand high pressure, extreme temperatures, and corrosive substances, including sour gas operations.
Dimensions of Hammer Union Seals
Hammer Union Seals are typically classified by size, which refers to their Inside Diameter (ID). Additional key measurements include Outside Diameter (OD) and Height.
| Size | ID mm | OD mm | Height mm |
| 2″ | 2.06” | 2.81″ | 0.57″ |
| 3″ | 3.15″ | 4.18″ | 0.54″ |
| 4″ | 4.19″ | 5.18″ | 0.54″ |
Materials Used in Hammer Union Seals
Choosing the right material for Hammer Union Seals is crucial for ensuring durability and performance. Here are the top materials used in manufacturing these seals:
1.Vertex H – HNBR (Hydrogenated Nitrile Butadiene Rubber)
- Excellent chemical resistance
- High-temperature stability
- Ideal for harsh environments
2.Vertex FC – FKM (Fluorocarbon Rubber)
- Exceptional performance in extreme temperatures
- Superior resistance to aggressive fluids
3.Novum P – PTFE (Polytetrafluoroethylene)
- Low friction properties
- Excellent chemical resistance
4.Cerulean N – NBR (Nitrile Butadiene Rubber)
- Cost-effective option
- Suitable for less aggressive applications
Types of Hammer Union Seals
Hammer Union Seals come in different types, each designed for specific applications and performance requirements:
- Brass Reinforced Hammer Union Seal – Provides enhanced durability and resistance to extreme conditions.
- Stainless Steel Reinforced Hammer Union Seal – Offers superior strength and corrosion resistance.
- Rubber Hammer Union Seal – Ideal for flexible applications requiring high compression sealing.
PTFE Hammer Union Seal – Excellent choice for chemical resistance and high-temperature environments.
Material Type
| Rubber | Stainless Steel | Brass | PTFE |
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Applications of Hammer Union Seals
Hammer Union Seals are widely used in High-Pressure applications across various sectors of the Oil and Gas Industry. Some key applications include:
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| 1. Wellhead Equipment – Ensuring a reliable seal in wellhead assemblies. | 2. Onshore & Offshore Drilling – Maintaining pressure integrity in drilling operations. | 3. Blowout Preventers (BOPs) – Critical for controlling well pressure and preventing blowouts. |
Selecting the right hammer union seal is essential for maintaining system efficiency and safety. High-quality seals prevent leaks, reduce downtime, and extend the lifespan of equipment in High-Pressure operations.
From material science to real-world performance, there’s more to know about what makes Hammer Union Seals indispensable in Oil & Gas. Discover how we engineer for durability, understand why material choice matters, and see how these seals perform in offshore and high-pressure environments.
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When a connection has to hold under extreme pressure, ISMAT's Hammer Union Seals are built to keep it sealed.
Contact us for Hammer Union Seals engineered for high-pressure oilfield service — built in-house and matched to your exact application, temperature and pressure rating.