Hammer Union Seals are a type of sealing mechanism used in high-pressure piping systems, typically in oil and gas applications. They are used to create a tight seal between two pipes or between a pipe and a piece of equipment, such as a valve or pump.
Hammer union comprises a threaded end, a nut end and a hammer nut which, when cinched up, compresses a composite seal assembly thereby preventing leakage. The seal assembly comprises a metal insert of a size to pass into the seal groove of conventional hammer unions and a small seal acting between the insert, the thread end and the nut end. The small seal is conveniently an O-ring or a Hammer Union Seal (Lip Seal) and is of a size that is compressed when the seal assembly is inserted into the thread end of the hammer union, thereby preventing the seal assembly from falling out of the threaded end when it is inverted.
Some profiles such as Fig 602, Fig 1502, Fig 2002, Fig206, Fig 1002, etc require a Hammer Union Lip Seal or an 'O'Ring depending on the size of the Hammer Union.
APIMEIVALVE company manufactures Hammer Union Seals (Lip Seals) for Standard Service in Nitrile and Fluoroelastomer for Sour Gas Service. The manufacturing process is closely monitored so as to guarantee the correct hardness and composition. APIMEIVALVE company also manufactures special Hammer Union Seals (Lip Seals) in materials that resist explosive decompression for safety and reliability. We manufacture compatible Hammer Union Seals for Weco Hammer Union Seals and FMC Hammer Union Seals.
Please contact us for more information on our Hammer Union Seals (Lip Seals).
| Name | Hammer union seals |
| Type | Fig 602, Fig 1502, Fig 2002, Fig206, Fig 1002, etc |
| Size | 2" 3" 4" or customized |
| Material | 80/85/90 NBR 80/85/90 FKM 90/95 FKM 80/90 HNBR PU, PTFE NBR/HNBR/FKM+Stainless steel NBR/HNBR/FKM+Brass |
| Usage | Used in the oil & gas industry, steel mills, chemical plants, strip mining, and marine dredging. |
| Working pressure | 10000psi-20000psi |
Hammer union seals are used in hammer union-style pipe connections to establish flow lines and prevent leaks. Hammer Unions are specifically designed to connect slurry tanks without the need to manage flange connections. If the problem is that the slurry tank is not properly aligned, hammer unions can still be utilized to create an absolutely leak-free seal that is tightened. They are designed as heavy-duty, high-pressure flowline connectors for use in the oil and gas industry, steel mills, chemical plants, strip mining and marine dredging.
