Spring-Loaded PTFE Rod Seal
Designed for very low friction, extreme temperature service (cryogenic to high temperature) or chemically aggressive environments. The standard material for the V-spring is 301 stainless steel, other materials available.
|Material||Operating Pressure up to||Maximum Pressure up to||Temperature||Surface Speed up to||Fluid, Media Compatability|
|Permachem xxxx||5,000psi (350bar) vacuum||10,000psi (700bar)||-328°F to 500°F (-200°C to 260°C)||33ft/s (10m/s)||Various material compound and spring combinations are available for aggressive chemicals, NACE service, chlorine service, cryogenic service, vacuum service, FDA (both contact and non-contact), fugitive emissions, as well as control fluids, hydraulic fluids, dry running in a wide range of gases|
|Material Permachem xxxx will be selected by AHPSeals to match your operating conditions.|
|*Important Note: Maximum values above depend on extrusion gap, clearances, seal material, media, temperatures, pressures, surface speed, dynamic running surface finish and working environment. Seals cannot be operated at their upper ratings at the same time. For pressure above 3.000psi (210bar)or temperature above 200°F (95°C), please contact engineering for seal material and hardware specification.|
Size Table (Inch)"The standard range sizes listed below are the preferred sizes for new design applications. Seals are available for any rod size in 0.001inch increments, including functional range. Additionally, we offer any other seal size as required.
| L |
|S|| C || R |
|Standard Range||Functional Range||Tolerance||D=||B=||D, B||Tolerances +0.010/-0||min.||min.||max.|
|0.125 - 0.249||0.125 - 4.000"||+0/-0.001||1/16||A + 0.125||A + 0.004||+0.001/-0||0.095||0.150||0.050||0.025||0.008|
|0.250 - 0.874"||0.230 - 6.000"||+0/-0.002||3/32 ||A + 0.187||A + 0.006||+0.002/-0||0.140||0.180||0.070||0.025||0.015|
|0.875 - 1.674"||0.335 - 20.000"||+0/-0.002||1/8||A + 0.250||A + 0.008||+0.002/-0||0.185||0.235||0.090||0.030||0.015|
|1.675 - 4.999"||0.750 - 30.000"||+0/-0.002||3/16||A + 0.375||A + 0.012||+0.002/-0||0.280||0.330||0.110||0.060||0.015|
|5.000 - 21.999"||1.575 - 71.000"||+0/-0.004||1/4||A + 0.500||A + 0.016||+0.004/-0||0.375||0.475||0.140||0.080||0.015|
|22.000 - 40.999"||1.575 - 71.000"||+0/-0.005||5/16||A + 0.625||A + 0.020||+0.005/-0||0.460||0.580||0.150||0.110||0.020|
|41.000 - 71.000"||consult AHPSeals engineering |
| *Standard cross-sections (CS) listed and non-standard sizes can be provided for any shaft size up to 71 inches. ** Based on using no wear rings, larger clearance required if using wear rings.|
Surface finish: Shaft (A) plunge ground, Ra 4-8µin - Housing (D,L) Ra 16-32µin.
Shaft material hardness 55-65RC. See Technical Info for more specific information.
Seal Housing Drawing