PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
What are the structural characteristics of the tetrafluoro rod
Classification:
Industry dynamics
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Release time:
2022-05-16
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The structural feature of the PTFE rod is that the axis of the valve stem and the contact surface of the regulating valve are on the same plane, and the symmetry line of the pipe channel is perpendicular to the line of symmetry. Due to the high insulation temperature of the PTFE rod, considering the thermal expansion effect of the pipeline, the shaft end temperature remediation mechanism has no choice but to seal the valve abnormally to ensure the sealing performance after extrusion and scraping.
The flange sealing surface is basically made of elastic materials such as rubber or polytetrafluoroethylene, so its use is limited by temperature. The structural feature of the PTFE rod is that the axis of the valve stem is parallel to the contact surface of the valve sealing pair, and is perpendicular to the symmetry line of the pipeline channel, so that the upper and lower ends of the pipeline are no longer in contact with the flange sealing surface when the valve is opened and closed, resulting in excessive extrusion. However, due to the single eccentric structure, in the whole switching process of the valve,Teflon RodofThe sealing surface of the sealing surface and the flange sealing surface are still squeezed and scratched.
The structural feature of the PTFE rod is that the axis of the valve stem deviates from the contact surface of the valve seal pair and the symmetry line of the pipeline channel. The function of double eccentricity is that when the valve is opened, the pipeline sealing surface can be immediately separated from the flange sealing surface, eliminating unnecessary excessive extrusion and scraping between the pipeline and the flange sealing surface, and reducing the sealing pair Wear and reduce the opening and closing torque.
At the same time, the PTFE rod can also use the metal flange sealing surface, which improves the application of the PTFE rod in the high temperature field. At the same time, the upper and lower shaft ends increase the temperature remedy mechanism, and the support gasket passively refreshes and interrupts the valve shaft size caused by the temperature to remedy the unprofitable state formed by excessive deformation, so that the pipeline does not offset, and the tail end is not damaged.
Teflon RodofIts main material includes tetrafluoroethylene. The material has strong corrosion resistance and is not easy to react with acid, alkali and other substances. Mainly divided into softPTFE washer = ring and hard PTFE washer. It has excellent performance and is widely used in all walks of life. Good deformation effect, can be used for sealing, good sealing performance. The material is a non-conductive material used to insulate the device. Good thermal conductivity, long service life and good aging resistance. Next, let's take a lookTeflon Rodcharacteristics.
1. High temperature resistance, working temperature up to 250 ℃.
Low temperature resistance and good mechanical toughness; even if the temperature drops to -196 ℃, the elongation can still be maintained at 5%.
3. Corrosion resistance. For most chemicals and solvents, it is inert, soTeflon RodIt can resist strong acid, strong alkali and various organic solvents.
4, weather resistance, aging life in the plastic.
High lubricity, low coefficient of friction in solid materials.
6, non-adhesion is a small surface tension in solid materials, do not adhere to any substance.
7, no physiological inertia, long-term implantation in the body as artificial blood vessels and organs without adverse reactions.
Teflon RodusedTeflon has many applications as a sealing material. Because of its high corrosion resistance, stable physical properties, high and low temperature resistance, it has good sealing performance.
Key words:
Teflon Rod
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