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The FDB seal is made of a helical wound spring and a polymer jacket, It is the best choice for vacuum, gas and low-temperature flange sealing applications.
Brand:
JST SealsItem NO.:
FDBPayment:
T/TProduct Origin:
ChinaShipping Port:
GuangzhouOrder(MOQ):
50Helical spring energized seals for oil and gas application
The low temperature PTFE spring energized seal for the valve is a single piston seal. When the working pressure is greater than or equal to 1500LB, a high-strength backup ring can be added to protect the sealing lip from damage. PTFE elgiloy lip seal is composed of PTFE+ Helical spring, and different materials can be used for different temperatures and pressures. Usually used for 6D ultra-low temperature (- 196 °) and normal temperature.
It has high spring load, good sealing integrity under low pressure, and can be used for internal and external pressure. It is the best choice for vacuum, gas and low-temperature flange sealing applications.
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Advantages: 1. Material compound passed API 6A FF/HH Immersion Testing; 2. Passed BS6364 test(-196℃); 3. High load helical wound spring with small deflection range; 4. Rigid spring acts as a energizer to resist low-temperature shrinkage; 5. NACE-approved energizers available for oil and gas use; 6. One-way or two-way design is available; 7. With single spring or double spring design; |
| Working Conditions | |||
| Material | Temperature range | Pressure | Medium |
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Sealing ring: Teflon+carbon fiber
Spring: 316SS
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-196~100℃ | 150LB, 300LB, 600LB, 900LB, 1500LB, 2500LB | LNG, Low temperature ethylene |
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FDB For valve end face |
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Groove DWG:
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Temperature Rating |
JST Series |
Spring |
0~900（LBS) |
900~2500(LBS) |
G=(OD-ID)/2 Standard CS:G=(OD-ID)/2 |
L Value |
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(-196℃~100℃) |
FDB |
Golden Elgiloy |
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3.1 |
4.8 |
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4.7 |
7.1 |
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6.1 |
9.5 |
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6.9 |
10 |
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Categories
In LNG operations, valves can regularly encounter temperatures below -320 F (-196 C) and pressures above 750 pounds per square inch (psi). They are also subjected to periodic variations in temperatures known as “thermal cycling,” which can result in hardware expansion as well as shrinkage and material stresses. These factors make reliable, long-term valve operation an engineering challenge.
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