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Higher quality hydraulic breaker hammer rod step seals NSJ
- Category： Rod seals
- Temperature: -45 - +200℃
- Pressure: 40MPa
- Material: filled PTFE
- Color: green, brown
- Product description：Higher quality hydraulic breaker hammer rod step seals NSJ
1. Description
A single-acting O-Ring energized rod seal for dynamic applications,step seals can be installed in closed grooves including grooves to ISO 7425. It offers high sealing efficiency, low friction with no stick-slip, minimal break out force and high wear resistance. Optimum sealing characteristics are achieved by installing in a tandem step seals arrangement together with a double-acting scraper. Available in bronze filled PTFE materials.
2. Installation Recommendation
3. Installation dimensions - Standard recommendations
|
Rod Diameter dN h9 |
Groove Diameter |
Groove Width |
Radius |
Radial Clearance S max. |
O-Ring Cross-Section |
||||
|
Standard Application |
Light Application |
Heavy Duty Application |
D1 H9 |
L1+0.2 |
R1 |
10MPa |
20MPa |
40MPa |
d2 |
|
3-7.9 |
8-18.9 |
- |
dN+4.9 |
2.2 |
0.4 |
0.3 |
0.20 |
0.15 |
1.78 |
|
8-18.9 |
19-37.9 |
- |
dN+7.3 |
3.2 |
0.6 |
0.4 |
0.25 |
0.15 |
2.62 |
|
19-37.9 |
38-199.9 |
8-18.9 |
dN+10.7 |
4.2 |
1.0 |
0.4 |
0.25 |
0.20 |
3.53 |
|
38-199.9 |
200-255.9 |
19-37.9 |
dN+15.1 |
6.3 |
1.3 |
0.5 |
0.30 |
0.20 |
5.33 |
|
200-255.9 |
256-649.9 |
38-199.9 |
dN+20.5 |
8.1 |
1.8 |
0.6 |
0.35 |
0.25 |
7.00 |
|
256-649.9 |
650-999.9 |
200-255.9 |
dN+24.0 |
8.1 |
1.8 |
0.6 |
0.35 |
0.25 |
7.00 |
|
650-999.9 |
≥1000.0 |
256-649.9 |
dN+27.3 |
9.5 |
2.5 |
0.7 |
0.50 |
0.30 |
8.40 |
|
≥1000.0 |
- |
650-999.9 |
dN+38.0 |
13.8 |
3.0 |
1.0 |
0.70 |
0.60 |
12.00 |
4. Standard materials
Sealing ring: filled PTFE
O-Ring: NBR / HNBR
5. Working Conditions
|
Diameter Range |
Pressure Range |
Temperature Range |
Speed |
Medium |
|
3 - 1600mm |
0 - 60MPa |
-45℃ +200℃ |
15 m/s |
hydraulic oil, flame retardant liquid, water, gas |
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