Linde Polymer Tec Co.,Ltd. is one of the most experienced manufacturers and suppliers of spring ptfe energized seals in China, also supports customized service. Please feel free to buy high quality spring ptfe energized seals for sale here from our factory.
What are Spring PTFE Energized Seals
Spring PTFE Energized Seals are made up of two components: a polymer-based seal jacket and a spring energizer. Spring-energized seals are great for use in environments that are too aggressive for other types of seals, as they provide a longer service life, maintain sealing pressure, and offer extreme wear resistance.
special features
- Spring Energized: Compared to traditional PTFE seals, Spring Energized Seals use a spring-charged mechanism around the sealing ring. This means that during installation, the spring applies a preload force to maintain pressure on the sealing ring against the sealing surface. This spring charging mechanism ensures that the sealing ring and sealing surface are always in close contact, providing more reliable sealing performance.
- Excellent sealing performance: Spring PTFE Energized Seals have excellent sealing performance. The low friction coefficient and excellent chemical stability of PTFE material make it suitable for various liquid and gas media. The preload force of the spring ensures permanent pressure contact between the sealing ring and the sealing surface, effectively preventing leakage.
- High-Temperature and High-Pressure Applications: Spring PTFE Energized Seal is suitable for high-temperature and high-pressure environments. PTFE material has excellent high-temperature resistance and can withstand the challenges of high-temperature media. At the same time, the preload force provided by the spring enables the sealing ring to cope with the sealing requirements in high-pressure environments.
- Adaptability: Spring PTFE-charged seals have certain adaptive performance. They can accommodate minor deformations in the sealing surface caused by factors such as temperature changes, pressure changes, or dimensional changes. This adaptive performance allows the seal to maintain effective sealing performance, providing a reliable seal even as operating conditions change.
How do spring PTFE energized seals work?
The proper function of a spring-energized seal requires 3 elements. The first is the contact between the sealing sleeve and the mating surface. The heel of the sealing sleeve must be supported for the seal to remain correctly in place and for the lip to function properly.
The second force is the resultant force of the spring energizer. The force of the spring tensioner can be very small if friction is heavy or very strong if leakage is a major problem. The spring force will be higher than the force caused by the interference. In applications with minimal or no pressure, springs become the dominant force. The spring acts as an initial energizer and prevents the media from bypassing the seal contact surface.
The third force is media pressure. The medium pressure is higher than the combination of interference and spring energizers and becomes the dominant force in many applications.
Types Of Spring Energizers Used In Seals
The types of spring energizers used in spring-energized seals include:
1. Helical Spring
The helical spring energizer design is intended for static applications due to the high unit load. It can be used in very slow or infrequent dynamic conditions when friction and wear are secondary concerns to positive sealing.
This spring energizer design produces an evenly distributed load across each band. Our in-house manufacturing team maintains minimal gaps between coils. This tight spacing provides continuous load, reducing potential leak paths and failures.
Helical springs are well-suited for vacuum and cryogenic applications.
2. Cantilevered V-Spring
Cantilever V Spring Seals utilize a V-shaped spring pressed into a seal jacket. At installation the Cantilevered V-Spring is compressed, pushing against the legs of the seal providing positive sealing pressure. This type of spring energizer has a linear load curve and significant deflection range.
Cantilevered V-Spring seals are ideal for applications whose materials resemble adhesive-like properties.
3. Canted Coil Spring
Advanced Slant Coil Springs are made from round wire which is coiled and formed into an elliptical shape on an inclined position. Unlike any other types of springs, Advanced Slant Coil Springs produce near-constant spring force over a wide range of working deflection and provide outstanding stress properties and fatigue life.
Canted coil springs are a great option for low, repeatable friction, and wide gland tolerances.
Spring Energized Seal Applications
Spring-energized seals are an ideal choice for sealing applications across a variety of industries, including:
Industrial
- Adhesive Dispensing Equipment
- Compressors
- Cryogenic Systems
- Food Processing Pumps
- Fluid Transfer Systems
- Insulators
- Mixers
- Robotics
- Vacuum Pumps
Medical Device & Life Sciences
- HPLC/UPLC
- Surgical Tools
- Autoclave Equipment
- Instrumentation
- Hematology Analyzers
- Oxygen Concentrators
- Pharmaceutical Equipment
Aerospace
- Actuators
- Gearboxes
- Turbine Engines
- Landing Gears
- Fuel Systems
- Quick Disconnects
- Cryogenic Valves
Oil & Gas
- Surface Drilling Equipment
- Downhole Tools
- Pumps and Valves
- Subsea and Deepwater Equipment
- HPHT Environments
- LWD/MWD Tools
Physical property information
| Physical Properties | Rating (Metric) | Rating (Imperial) | Test Method |
| Specific gravity | 2.18 g/cc | 2.18 g/cc | DIN 53 479 |
| Saturated water absorption | <= 0.050 % | <= 0.050 % | DIN 53 495 |
| Mechanical Properties | Ratings (metric) | Ratings (imperial) | Test Methods |
| Ball pressure hardness | 30.0 MPa @Time 30.0 sec |
4350 psi @Time 0.00833 hour |
DIN 53 456 |
| Tensile strength | 25.0 MPa |
3630 psi |
DIN 53 455 |
| Elongation (breaking) | 500 % | 500 % | DIN 53 455 |
| Electrical Properties | Ratings (Metric) | Ratings (Imperial) | Test Methods |
| Volume resistivity | 1.00e+18 ohm-cm | 1.00e+18 ohm-cm | DIN 53 482 |
| Dielectric strength | 48.0 kV/mm | 1220 kV/in | Breakdown; DIN 53 481, IEC-243 |
| Thermal Performance | Rating (Metric) | Rating (Imperial) | Test Method |
| Coefficient of linear thermal expansion | 200 µm/m-°C | 111 µin/in-°F | |
| Thermal Conductivity | 0.250 W/m-K | 1.74 BTU-in/hr-ft²-°F | |
| Melting temperature | 327 °C | 621 °F | DIN 53 736 |
| Heat distortion temperature under load (0.46 MPa) | 121 °C | 250 °F | ISO-R 75 Method B |
| 23°C, 70 hr, in Reference Fuel B | 1.0 % | ASTM D471 | |
| Glass transition temperature, Tg | -20.0 °C | -4.00 °F | dynamic; DIN 53 736 |
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