Control valve packing

Past, fillers selected key consideration is that the filler operating temperature. Therefore, when the temperature is below 200 ° C when used polytetrafluoroethylene (PTFE), when the temperature is higher than 200 ° C (optional graphite now, the selection of filler, not only to consider the operating temperature, but also consider packing friction control process caused by impact, for example, hysteresis, the quality of the seal and the life of the type of application process, the type of installation conditions, these variables are difficult to use quantitative methods to describe, therefore, can only choose from a variety of performance comparison of different filler more suitable in the actual process and operating conditions of the stuffing box and the packing structure of the selection of the filler may be a single material, such as polytetrafluoroethylene (PTFE) or graphite, can also be made of a different shape, for example, 60 ° and 90 ° V-shaped ring shape and filamentous types of materials can also be mixed, for example, graphite-PTFE, filamentous graphite - Stamping graphite.
Packing structure mini solenoid valve
Packing structure of arrangement of the various filler packing system, to achieve as much as possible to reduce friction and prolong the service life of purpose in the premise of ensuring the desired amount of leakage Level. PTFE stuffing box packing system as stuffing or PTFE packing components. Typically, PTFE made a V-shaped ring.
The graphite filler filler system structure. Typically, several graphite filaments, sheets and bending sheet. Filamentous graphite can be made of woven ribbon, it is easy to close contact with the valve stem and purify the stem surface. Filamentous graphite gap will result in the increased leakage. Therefore, the filamentous graphite filler metal forming, to increase its compactness.
The use of graphite packing system, the friction is greater than the PTFE stuffing box system, so as long as the temperature should be used PTFE packing system.
Visible from Figure 2, Figure 3, the type of packing arrangement, the type of packing structure on
Sealing, friction performance and service life and did not take the impact, therefore, should be a reasonable choice. Packing system in the sealing performance requirements are met, you should try to improve the performance of friction, reduce maintenance, improve service life.shut off solenoid valve