Type 21 Mechanical Seal
Constructive characteristics
| ✓ |
Cartridge |
| ✓ |
Balanced |
| ✓ |
Secundary seals in o´ring |
| ✓ |
Single spring |
| ✓ |
Bi-directional |
Type 21 Mechanical Seal
Operational Conditions
| Shaft Diameters |
(mm) |
(Inch) |
| 25,00 ~ 100,00 |
1,000" ~ 4,000" |
| Temperature |
(Celsius degree) |
(Fahrenheit) |
| -20,00 ~ 220,00 |
-4,00 ~ 428,00 |
| Pressure |
Maximum (BAR) |
Maximum (PSI) |
| 25,00 |
362,60 |
| Maximum sliding velocity (Vg) |
| Seal face |
Stationary Seat |
Vg (m/s) |
Vg (fp/s) |
| A |
Q1 |
20 |
65,6 |
| B |
Q1 |
20 |
65,6 |
| A |
Q2 |
20 |
65,6 |
| B |
Q2 |
20 |
65,6 |
| Q1 |
Q1 |
10 |
32,8 |
| Q2 |
Q2 |
10 |
32,8 |
| Q1 |
U2 |
10 |
32,8 |
| Q2 |
U2 |
10 |
32,8 |
| U2 |
U2 |
10 |
32,8 |
Type 21 Mechanical Seal
Materials
| Seal face material (DIN 12756) |
| A |
Carbon, metal-impregnated |
| B |
Carbon, resin-impregnated |
| Q1 |
SiC, silicon carbide, sintered pressureless |
| Q2 |
SiC-Si, reaction bonded |
| U2 |
Tungsten carbides, Ni-bonded |
| Stationary seat material (DIN 12756) |
| Q1 |
SiC, silicon carbide, sintered pressureless |
| Q2 |
SiC-Si, reaction bonded |
| U2 |
Tungsten carbides, Ni-bonded |
| Secundary seals (DIN 12756) |
| V |
Fluoro rubber (FPM) |
| E |
Ethylene propylene rubber (EPPM) |
| P |
Nitrile rubber (NBR) |
| K |
Perfluorocarbon rubber |
| X |
Other elastomers |
| Springs (DIN 12756) |
| F |
CrNi steel |
| G |
CrNiMo steel |
| Metal Parts (DIN 12756) |
| F |
CrNi steel |
| G |
CrNiMo steel |
| T |
Other Metals |
Type 21 Mechanical Seal
Dimensional
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Site under construction.
For information about the dimensional, contact Malavazi.
Type 21 Mechanical Seal
Images
