The Single-Spring Mechanical Seal is an unbalanced, bidirectional cartridge/component seal engineered for reliable fluid containment in industrial pumping and rotating equipment. Featuring a precision-lapped stationary face paired with a spring-loaded rotary unit, it provides leak-proof sealing under demanding operating conditions.
Key Specifications & Features
Configuration
Single helical coil spring with elastomer/O-ring secondary seals and pressed stainless steel drive collar.
Sealing Mechanism
Precision-machined stationary seat (ST.OD) with elastomer boot/O-ring paired with a self-aligning rotary ring.
Direction of Rotation
Non-directional / bidirectional (independent of shaft rotation direction).
Dimensional Compliance
Designed to standard metric/imperial shaft sizes with standardized rotary working lengths.
| SEAL SIZE | ROTARY OD | ST OD W/O ORING | ST. OD | ROTARY LENGTH | ST LENGTH |
|---|---|---|---|---|---|
| 10 | 20 | 14 | 18.1 | 15 | 7 |
| 11 | 22 | 16.5 | 20.6 | 18 | 7 |
| 12 | 22 | 16.5 | 20.6 | 18 | 7 |
| 13 | 25 | 19 | 23.1 | 22 | 7.5 |
| 14 | 25 | 19 | 23.1 | 22 | 7.5 |
| 15 | 29 | 21 | 26.9 | 22 | 9.2 |
| 16 | 29 | 21 | 26.9 | 23 | 9.2 |
| 17 | 29 | 21 | 26.9 | 23 | 9.2 |
| 18 | 33 | 25 | 30.9 | 24 | 10 |
| 19 | 33 | 25 | 30.9 | 25 | 10 |
| 20 | 33 | 25 | 30.9 | 25 | 10 |
| 21 | 38 | 30 | 35.4 | 25 | 10 |
| 22 | 38 | 30 | 35.4 | 25 | 10 |
| 23 | 38 | 30 | 35.4 | 27 | 10 |
| 24 | 38 | 30 | 35.4 | 27 | 10 |
| 25 | 40 |
| No. | DESCRIPTION | MATERIAL |
|---|---|---|
| 1 | Oring | NBR / HNBR / VITON |
| 2 | Stationary ring | Graphite carbon / SIC |
| 3 | Rotary ring | Alumina ceramic / SIC |
| 6 | Retainer | SUS304 |
| 7 | Spring | SUS304 |
Application:
| PARAMETER | SPECIFICATION |
|---|---|
| Pressure | 1MPa |
| Speed | 12M/S |
| Temperature | -30°C ~ 200°C |
