Hydraulic and Pneumatic Seals...since 1975
VARISEAL is a two piece single acting rod seal which consists of a PTFE / CARBON u-ring with RVS spring as a tension component.
PRODUCT ADVANTAGES
APPLICATION
Hydraulic and pneumatic cylinders , hot water valves , pumps , hot steam vanes , food processing, chemical and medical technology.
INSTALLATION
The prestressed VARISEAL can only be mounted in an open groove. The assembly tools must be free of sharp edges and burrs. For imontage, the VARISEAL must be greased or oiled with system oil
NOTES
Depending on the PTFE / CARBON material application values and their resistance can change. The permissible sealing gap values of VARISEAL spring loaded rod seal is given in the below table
| PERMISSIBLE SEALING GAP VARISEAL Smax (mm) | ||||
| B (mm) | 50 Bar | 150 Bar | 250 Bar | 350 Bar |
| 2.4-3.6 | 0.10 | 0.075 | 0.05 | 0.05 |
| 4.8 | 0.20 | 0.10 | 0.075 | 0.06 |
| 7.1 | 0.25 | 0.15 | 0.10 | 0.075 |
| 9.5 | 0.30 | 0.15 | 0.13 | 0.075 |
Note: The largest sealing gap value occurring on the non-pressurized side of the seal does have a vital importance for the function of the seal and in this respect it is quite important to use the S value lower than the above indicated numbers.
MATERIAL: PTFE CARBON / STAINLESS STEEL SPRING
| OPERATING CONDITIONS | |||
| MEDIA | Hydraulic oils , hot air , water , steam , all media that do not react PTFE and stainless steel | ||
| TEMPERATURE | -150°C +250°C | ||
| PRESSURE | ≤350 Bar | ||
|
≤15.0 m/sn | ||
Note: The above data are maximum values and cannot be used at the same time.
| SURFACE ROUGHNESS | Ra | Rmax |
| Sliding Surface ØD-Ød | ≤0.2 μm | ≤2.0 μm |
| Groove Base ØDb-Ødp | ≤1.6 μm | ≤6.3 μm |
| Groove Flanks B | ≤3.2 μm | ≤15 μm |
Note: It is recommended to have 50% to 90% of the working surface material contact area value.
|
|||||||||||||||||||||||
|
|||||||||||||||||||||||
CB = Custom build (price on request)
* = Stock item
Stock = 0 (and not a Stock* or CB product) -> minimum item value € 20.00
|
|||||||||||
|
|||||||||||
