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Product name |
ProductApplication | Material | Profile |
Standard Hardness Shore A |
Pressure - (max) bar | Temperature |
Sliding Speed (max m/sec) |
Dimension | Price |
Pressure Rating |
Rotary Speed |
pH Range |
Dimensions |
| CH48 Double-acting Compact Seals | NBR TPE POM |
|
700 | -30°C+105°C | ≤0.5 |
|
CH48 is a four-piece double-acting heavy-duty piston seal which consists of one TPE profile ring, one elastomeric nitrile rubber ring to preload sealing element and two thermoplastic back-up rings.
PROFILE
PRODUCT ADVANTAGES
• Simple groove design
• Superior performance at high and variable pressure
• Long service life
• Very good sealing performance at shock pressures
• High resistance to abrasion
• Ultimate resistance in water-based fluids
APPLICATION
Mining industry
Heavy duty applications
INSTALLATION
Easily assembled into one-piece pistons because the back-up rings are produced in split forms. It is very important that the assembly tools must be of soft material and have no sharp edges. Before installation the sealing element must be oiled with system oil.
|
SURFACE ROUGHNESS |
Ra (µm) |
Rmax (µm) |
|
SLIDING SURFACE D |
≤ 0.4 |
≤ 4.0 |
|
GROOVE BASE d |
≤ 1.6 |
≤ 10 |
|
SIDES OF GROOVE B |
≤ 3.2 |
≤ 16 |
Note: It is recommended to have Rmr ratio between 50% to 90%
|
PERMISSIBLE SEALING GAP – S max (mm) |
|
|
Pressure (bar) |
S max (mm) |
|
- ≤ 350 |
0.45 |
|
350 ≤ 700 |
0.25 |
NOTES
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.
