Spring Energized Seals

Seal Spring Materials and Designs

Machined Teflon® Seal Design Chart

Due to the nature of spring energized seal applications, a wide range of available seal jacket and seal spring materials are offered to customers to provide an engineered product that fits with the entire scope of their various applications. Spring energized seals are a last resort for most companies that consider using them in their application. Typically, by the time a company has to resort to the use of a spring energized seal, all other attempts at using more conventional seals have failed. This is exactly why such a wide range of materials for these seals are available; to provide the right combination of materials to completely meet the specifications set by the parameters of an application. This section will touch on seal jacket materials, seal spring materials and describe their use.

SEAL JACKET MATERIALS

PTFE
Filled PTFE

5% Molybdenum Disulphide filled PTFE
15% Graphite filled PTFE
15% Glass, 5% Moly filled PTFE

Alloyed PTFE
Thermoplastics
UHMW Polyethylene
GUR® UHMW
Hytrel® (DuPont® Polyester Elastomers).

SEAL SPRING MATERIALS AND DESIGNS
The primary function of the spring is to provide energy to the sealing jacket for effective sealing at low system pressures. The spring also is used to compensate for the low resiliency or lack of memory of the jacket materials in relation to wear in dynamic applications. When operating conditions permit, an elastomer energizer may be used as an alternative to the metal energizer.

301 Stainless Steel Spring-MIL-S-5059

Elgiloy Spring

V-Section Finger Spring

Round Section Helical Wound Spring

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MACHINED TEFLON® SEAL DESIGN CHART

Teflon® seals can be used to upgrade existing designs as well as to provide a positive seal for newly designed products. The following diagrams are a few of the many machined designs available from Vedovell. If you do not see your required design or are unsure of the right one, please inquire. We will be glad to assist you.

Standard double bump General purpose "V spring	Standard single bump General purpose for rougher surfaces "V" spring	Silicone filled FDA approved "V" spring	Large cross section Large gland cross-section "V" spring

Flange seal Prevents seal rotation "V" spring	Scraper - standard Can make different OD-ID designs "V" spring	Helical spring seal Cryogenics	Wiper High abrasion resistance

Back-ups and wear band	Metric, all styles and sizes	Piston cups	Slyd-ring, skive-cut

Standard double bump O-ring actuated	Glyd-ring O-ring	V-packing	Back-up ring O-ring

	U-packing	Double delta O-ring

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RYTON® is a registered trademark of
Chevron Phillips Chemical Company

GUR® is a registered trademark of
Ticona