Bal Seal® Spring-energized Large Diameter Seals

Bal Seal® spring-energized large diameter seals offer big performance advantages in critical equipment. Designed to handle slow-speed rotary and reciprocating applications, these one-piece seals provide OEM designers and end users with excellent resistance to wear, extrusion and chemicals – all of which translates into more uptime and profitability.
These low-friction seals are energized with a Bal Seal Canted Coil Spring®, which promotes even wear and prolongs service life. They are available in select profiles and a variety of materials, including:
  • SP-5 – Polymer-filled PTFE
  • GC-5 – Graphite/glass-filled PTFE
  • GF-5 – Glass-fiber-reinforced PTFE with lubricant
  • G-5 – Graphite-filled PTFE
Filled PTFE seals are available in sizes up to 120 in. ID. Thermoplastics, which can be incorporated into backup designs, are available in sizes up to 94 in. ID. See table 1. below for material operating ranges and sizes.
   Material    SP5    G5    GC5    GF5
   Min Temp     -450 oF     -450 oF     -450 oF     -450 oF
   Max Temp     500 oF     475 oF     500 oF     500 oF
   Max Size (ID)    120 in.    120 in.    120 in.    120 in.

Table 1. Large diameter seal operating ranges and sizes.

Typical Applications

Our large diameter seals answer a growing demand for high-performance sealing across a variety of industries. Examples include:

Oil & Gas
Rotary steerables
Swivels/turret mooring systems
Tong systems
Subsea wellhead systems
MRI/CT scanners
Pulp & paper mills
Smelting plants










Bal Seal large diameter seals feature proven Canted Coil Spring® technology and a variety of seal jacket material formulations. Geometries can be customized to meet demanding application requirements.
Bal Seal Engineering, Inc. is a trusted supplier of sealing, connecting, conducting and EMI shielding components to worldwide industry. For over 50 years, we’ve been applying our engineering, manufacturing and material science expertise to help customers improve the performance and reliability of their designs. 
Contact us today for more information about our large diameter spring-energized seals.


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