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12
2022
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05
What is Stefen? What are its advantages?
The stem seal is a sealing ring of a single-acting shaft. The moving surface material, the slip ring, is made of polytetrafluoroethylene (PTFE) bronze. The English names correspond to the SEALFLON Bronze. We can choose different materials according to different working environment. Its static surface material, the O-ring, is made of nitrile rubber with a hardness of 70 ShA. The material of the O-ring can be selected according to different working environments.
Author:
StefonWhat type of sealing ring does it belong to? What are its advantages? Let's explain it in detail.
The stem seal is a sealing ring of a single-acting shaft. The moving surface material, the slip ring, is made of polytetrafluoroethylene (PTFE) bronze. The English names correspond to the SEALFLON Bronze. We can choose different materials according to different working environment. Its static surface material, the O-ring, is made of nitrile rubber with a hardness of 70 ShA. The material of the O-ring can be selected according to different working environments.
One. characteristics of stefon:
1. The dynamic sealing element ensures extremely low friction and communication performance, and due to its chemical resistance, it has high compatibility with almost all liquid media, surpassing all other thermoplastics and elastic rubbers.
2. The outer O-ring is used as the reinforcement element of the static seal, and the deformation rate is low.
3. Low static and dynamic friction
4. Allow to tell the operation.
5. No stick-slip movement trend.
6. Space-saving structure and simple groove design.
7. It has high compatibility with almost all fluids (under the premise of choosing the O-ring material correctly)
8. High extrusion resistance
9. High temperature resistance.
II. the scope of application of the seal:
Pressure: 600 bar
Speed: ≤ 15 m/s
Temperature: PTFE nitrile rubber:-30 ℃- 0 ℃
PTFE FKM:-30℃-﹢200℃
Sealing fluid: almost all fluids have high compatibility (under the premise of the correct choice of O-ring material)
Surface finish:
Dynamic surface: Ra≤ 0.3μm Rt≤ 2.5μm
Static performance: Ra≤ 1.6 microns RT ≤ 6.3 μm
Tip: When installing the seal, please pay attention to avoid damaging the sealing lip, and the shaft must have a round chamfer. Sharp edges and burrs must be removed from the installation area.
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