PTFE Spring Energized Seal
High-performance industrial sealing solutions using an internal Spring Energizer to provide preload to the sealing lip and support custom seal profiles.
Example of a PTFE Spring Energized Seal with an internal Spring Energizer
A Spring Energized Seal combines a PTFE or engineered polymer seal jacket with an internal Spring Energizer.
The spring provides mechanical preload to the sealing lip and helps maintain contact with the mating surface even when system pressure is low.
Typical Applications
Rod seals, piston seals, static seals, face seals, selected rotary applications, special machinery and non-standard replacement seals.
How does a Spring Energized Seal work?
Spring Energizer
The spring installed inside the seal jacket creates mechanical preload and helps maintain contact between the sealing lip and the rod, shaft, bore or sealing surface.
Pressure Assisted
As system pressure increases, media pressure may further energize the sealing lip depending on the selected profile.
The Spring Energizer helps maintain mechanical preload on the sealing lip
What is a double-sided spring seal?
Double-Sided / Symmetrical Profile
Some PTFE seal profiles may contain more than one spring position or use a symmetrical cross-section. These may be informally described as double-sided spring seals or PTFE seals with springs on both sides.
Profile Selection
Similar external appearance does not guarantee interchangeability. Groove dimensions, pressure direction, temperature, media, speed and motion should be reviewed before replacement.
Why is PTFE commonly used?
Low Friction
Suitable for many sliding and reciprocating sealing applications.
Chemical Compatibility
PTFE offers compatibility with many industrial media subject to compound selection.
Custom Machining
Custom dimensions and specialized profiles can be produced by machining.
What is PTFE D05 Blue?
PTFE D05 BLUE Material for Machined Sealing Applications
PTFE D05 is a material grade that may be encountered in certain PTFE Seal and Spring Energized Seal applications. The material may appear blue or blue-green.
Compound composition and specifications may vary by manufacturer. Material selection should therefore be based on actual operating conditions rather than color alone.
Typical Spring Energized Seal Applications
Rod Seal
For reciprocating rods and linear components.
Piston Seal
For piston sealing inside a cylinder or bore.
Static / Face Seal
For static joints and sealing between mating faces.
Rotary / Special Profile
For selected rotary applications and specialized sealing profiles.
Profile selection should be based on groove dimensions and actual operating conditions.
No Part Number? A replacement may still be evaluated.
Evaluation from Existing Seal Data
An existing seal sample, groove dimensions or an engineering drawing can often be used as the starting point for evaluating the seal profile and dimensions.
Suitable for old or discontinued machinery
This approach can be useful when the original brand is unknown, the Part Number is unavailable, the seal has been discontinued or a special dimension is required.
Information required for seal evaluation
Seal Dimensions
ID × OD × THK or groove dimensions
Pressure
Operating pressure and pressure direction
Temperature
Minimum and maximum operating temperature
Media
Water, oil, air, gas, steam or chemicals
Motion / Speed
Static / Reciprocating / Rotary and operating speed
Reference Data
Existing seal sample, cross-section photo, groove dimensions or engineering drawing
Custom Machined PTFE Seals
Custom-made Sealing Solutions
Flow Engineering and Service Co., Ltd. provides industrial Sealing Solutions, Machined Seals and custom PTFE seals.
Custom seals can be evaluated from existing seal samples, groove dimensions or engineering drawings for special dimensions, discontinued components and non-standard profiles.
Frequently Asked Questions
What is a Spring Energized Seal?
It combines a PTFE or engineered polymer jacket with an internal Spring Energizer that provides preload to the sealing lip.
What is a double-sided spring seal?
Some profiles may contain two spring positions or use a symmetrical cross-section. The exact profile should be verified using groove dimensions and application data.
Can a replacement be made without a Part Number?
An existing seal sample, groove dimensions or an engineering drawing can often be used as the starting point for replacement evaluation.
Need a custom replacement seal?
Send us your existing seal photo, cross-section, groove dimensions and operating conditions for preliminary evaluation.
Flow Engineering and Service Co.,Ltd.
บริษัท โฟลว์ เอ็นจิเนียริ่ง แอนด์ เซอร์วิส จำกัด
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55/89 Moo 5, Thap Ma, Mueang Rayong, Rayong 21000, Thailand
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