The New Mechanical Shaft Seal Designed By Zhong Chao Carbon
Features:
1 Chamber seal (modular design - can be combined in any order),
optinal with housing and lid for screw compressors with one-part
and horizontally split housing
2 Very small operation gap – low leakage
3 Dry running
4 Seal rings bear radial shaft movements
5 Compensates axial shaft movements
6 No sealing components mounted on the shaft and hence no
additional shaft vibrations
7 Seal rings running contact-free – sliding faces and machine
consume no additional power
8 One-piece seal ring with titanium bandage
9 Both side balanced seal ring inside chamber for short-term
backpressure operation
10Seal ring axially spring-loaded – no swinging up at pressure-less
machine operation
Advantages:
High reliability
Long-term operation time
Maintainability
operating range:
Shaft diameter:
d = 50 ... 340 mm (1.79" ... 13.39")
Operating pressure:
p = vacuum ... 65 bar (942.75 PSI) abs.
Operating temperature:
t = –120 °C ... +225 °C (–184 °F ... +437 °F)
Sliding velocity: vg = max. 240 m/s (787 ft/s) Radial play: 1.0 mm
(0.04")
Axial movement: theoretically unlimited Recommended wear guard:
>58 HRC
seal materials table:
| grade | Impregnated material | Bulk Density (g/cm3) | Flexural strength (Mpa) | Compressive Strength (Mpa) | Shorn hardness (Hs) | Porosity (%) | Thermal Expansion Coefficient (10-6/℃) | Shock strength -3 αk×10 /mm² | Young's modulus (GPa) | T (℃) |
| M180K | resin | 1.82 | 80 | 240 | 90 | 1.2 | 5.5 | / | 17 | 210 |
| M181D | Antimony | 2.3 | 80 | 200 | 80 | 1.0 | 5.5 | 3.5 | 25 | 400 |
| M181P | Copper | 2.4 | 70 | 240 | 70 | 3.0 | 6.0 | / | 25 | 350 |
| M191T | pure carbon/graphite | 1.82 | 75 | 230 | 90 | 1.0 | 5.5 | 2.9 | 17 | 400 |
| ZC7-3 | pure carbon/graphite | 1.90 | 110 | 250 | 100 | 0.5 | 6.0 | 4 | 15 | 500 |
products sketch:
