Spring Energized PTFE Seals

  • Rotary, reciprocating and oscillatory motions can typically be sealed with Spring Energized Seals depending on design.
  • Great performance in compressed gas waterless fracking seals, LPG and Liquid Nitrogen seals, 
  • Outstanding chemical compatibility and extreme low temperature seal, cryogenic seal applications.
  • Low friction and long service life in demanding application.
  • Spring Energized Seals can operate < 3,000 psi custom < 60,000 psi.
  • SES can operate -280o to 500o F custom -400o to 600o F.
  • Wide range of spring energizing configurations based on application.
  • Seals are available in Rod and Piston Inside and Outside Pressure and unidirectional sealing configurations.
  • MSE® Seals, Bal Seals, Variseal®, OmniSeal®, FlexiSeal®.

Metal Spring Energized PTFE Seals for Extreme Environments

Alternative to: MSE® Seals, Bal Seals, Variseal®, Omniseal®; and Flexiseal®

 

SEAL TYPES AND GENERAL CAPABILITIES

  OPERATING TEMPERATURE
MIN             MAX
SEALABILITY WITH HELIUM APPLICATIONS
FINGER SPRING
-73°C
-100°F
315°C
600°F
Good This seal type is mainly intended to be used in dynamic applications. This seal has a balance of good sealability, low friction and long service life. Can be used for up to 250 ft/min. surface speed. Available in piston, rod and face seal configurations.
Coil SPRING
-173°C
-280°F
260°C
500°F
Better This seal type is designed for static or slow dynamic applications, sacrificing some flexibility for improved sealability. Available in piston, rod and face seal configurations.
DOUBLE COIL SPRING
-268°C
-450°F
260°C
500°F
Best This seal type is designed for static applications only. The high spring load ensures better sealability than a single spring seal. This type of seal is specifically recommended for cryogenic applications. Available in piston, rod and face seal configurations.
O-RING ENERGIZED
* * Good This seal type is suitable for static and dynamic applications. The o-ring is energized is used in cases when the metal spring cannot be used for compatibility reasons. Available in piston, rod and face seal configurations.

 

JACKET MATERIALS AVAILABLE

  • Virgin PTFE: Recommended for most static applications for pressures < 3,000 psi
  • Graphite Filled PTFE: Recommended for dynamic applications for pressures < 3,000 psi
  • Carbon Filled PTFE: Recommended for dynamic applications for pressures < 5,000 psi
  • Polymer Filled PTFE: Recommended for dynamic applications and long life for pressures < 3,000 psi
  • Other Materials: Nitrile, FKM, FFKM are also available for use as jacket and energizer materials.

SPRING MATERIALS AVAILABLE

  • 301 SS: Recommended for general applications. For temperatures up to 400°F
  • Elgiloy: Greater chemical and temperature resistance. Meets NACE MR-01-75. For temperatures up to 600°F
  • 17-7 PH SS: Standard for Coil springs for general applications. For temperatures up to 500°F
  • Inconel 718: For extreme temperatures up to 600°F

Note: Contact Marco's engineering for applications requiring higher temperatures and/or higher pressures.

 

 

EXAMPLE OF SEAL CONFIGURATIONS

Note: Many more custom designed configurations are available to meet a wide range of hardware configurations and applications.

METAL SPRING ENERGIZED PTFE SEAL GLAND DESIGN GUIDE

 

GLAND CONFIGURATIONS

RADIAL GLAND FLANGE GLAND

TYPICAL EQUIPEMENT

Metal Spring Energized PTFE Seal Gland Design Guide

SPRING ENERGIZED O-RINGS

 

PFA or FEP polymer encapsulating a  300 series stainless steel spring.  Excellent chemical resistance and a temperature capability from -420o to +500o F.

Spring Energized O-rings are typically available in the following cross-sections and can be made to match standard AS568A o-ring sizes

  • 0.070” cross-section
  • 0.103 cross-section
  • 0.139 cross-section
  • 0.210 cross-section
  • 0.275 cross-section

MSE® is a registered trade name of Greene, Tweed & Co. Variseal® is a registered trade name of Trelleborg. Omniseal® is a registered tradename of Saint Gobain.
Flexiseal® is a registered trade name of Parker Seal. PTFE is a registered trade name of DuPont Corp.