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Rod seals are static seals installed in glands or housings to prevent the leakage of fluid from within a cylinder to the outside as the rod cycles.
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50Hydraulic rod seal PTFE SPNS step seal
SPNS type hydraulic seals, are also call rod buffer step seals, static seals installed in glands or housings to prevent the leakage of fluid from within a cylinder to the outside as the rod cycles.
SPNS seals can be applied to various applications, especially those occasions where polyurethane seals are not suitable for applications, such as oil in water or emulsion media. PTFE materials have extremely low friction, corrosion resistance and heat resistance compared with other known sealing materials, However, compared with polyurethane and other rubber sealing materials, PTFE is hard and has poor elasticity. In order to make full use of the advantages of PTFE, PTFE must be matched with an expansion ring to supplement elasticity as a seal. At the same time, the PTFE slip ring must be reasonably designed, and the expansion ring must provide sufficient initial sealing force and ensure its static sealing function in the groove.
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Advantages:
1.Chemical resistance 7. High pressure resistance |
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Working Conditions |
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Working Pressure |
Working Temperature |
Working Speed |
Working Medium |
Material |
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≤40Mpa |
-30℃ to +110℃
-25℃ to +220℃
Depending on material selected |
≤4m/s |
Hydraulic oil; Gas; Water; etc |
PTFE Band: Bronze filled PTFE
O Ring:
NBR, A70±5
FKM, A75±5 |
Hydraulic rod seal size chart:
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| PN. | Size | Material |
| STR | 40X55.1X6.3 | PTFE+Bronze, NBR |
| STR | 45X60.1X6.3 | PTFE+Bronze, NBR |
| STR | 48X63.1X6.3 | PTFE+Bronze, NBR |
| STR | 50X65.1X6.3 | PTFE+Bronze, NBR |
| STR | 55X70.1X6.3 | PTFE+Bronze, NBR |
| STR | 56X71.1X6.3 | PTFE+Bronze, NBR |
| STR | 60X75.1X6.3 | PTFE+Bronze, NBR |
| STR | 63X78.1X6.3 | PTFE+Bronze, NBR |
| STR | 65X80.1X6.3 | PTFE+Bronze, NBR |
| STR | 70X85.1X6.3 | PTFE+Bronze, NBR |
| STR | 75X90.1X6.3 | PTFE+Bronze, NBR |
| STR | 80X95.1X6.3 | PTFE+Bronze, NBR |
| STR | 85X100.1X6.3 | PTFE+Bronze, NBR |
| STR | 90X105.1X6.3 | PTFE+Bronze, NBR |
| STR | 95X110.1X6.3 | PTFE+Bronze, NBR |
| STR | 100X115.1X6.3 | PTFE+Bronze, NBR |
| STR | 105X120.1X6.3 | PTFE+Bronze, NBR |
| STR | 110X125.1X6.3 | PTFE+Bronze, NBR |
| STR | 115X130.1X6.3 | PTFE+Bronze, NBR |
| STR | 120X135.1X6.3 | PTFE+Bronze, NBR |
| STR | 125X140.1X6.3 | PTFE+Bronze, NBR |
| STR | 130X145.1X6.3 | PTFE+Bronze, NBR |
| STR | 140X155.1X6.3 | PTFE+Bronze, NBR |
| STR | 145X160.1X6.3 | PTFE+Bronze, NBR |
| STR | 150X165.1X6.3 | PTFE+Bronze, NBR |
| STR | 155X170.1X6.3 | PTFE+Bronze, NBR |
| STR | 160X175.1X6.3 | PTFE+Bronze, NBR |
| STR | 180X195.1X6.3 | PTFE+Bronze, NBR |
| STR | 40X55.5X6.3 | PTFE+Bronze, NBR |
| STR | 45X60.5X6.3 | PTFE+Bronze, NBR |
| STR | 48X63.5X6.3 | PTFE+Bronze, NBR |
| STR | 50X65.5X6.3 | PTFE+Bronze, NBR |
| STR | 55X70.5X6.3 | PTFE+Bronze, NBR |
| STR | 56X71.5X6.3 | PTFE+Bronze, NBR |
| STR | 60X75.5X6.3 | PTFE+Bronze, NBR |
| STR | 63X78.5X6.3 | PTFE+Bronze, NBR |
| STR | 65X80.5X6.3 | PTFE+Bronze, NBR |
| STR | 70X85.5X6.3 | PTFE+Bronze, NBR |
| STR | 75X90.5X6.3 | PTFE+Bronze, NBR |
| STR | 80X95.5X6.3 | PTFE+Bronze, NBR |
| STR | 90X105.5X6.3 | PTFE+Bronze, NBR |
| STR | 95X110.5X6.3 | PTFE+Bronze, NBR |
| STR | 100X115.5X6.3 | PTFE+Bronze, NBR |
| STR | 105X120.5X6.3 | PTFE+Bronze, NBR |
| STR | 110X125.5X6.3 | PTFE+Bronze, NBR |
| STR | 120X135.5X6.3 | PTFE+Bronze, NBR |
| STR | 155X170.5X6.3 | PTFE+Bronze, NBR |
| STR | 160X175.5X6.3 | PTFE+Bronze, NBR |
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