Seal Proof Engineering
Technical datasheet
Mechanical Shaft Seals
Multi Spring Seal
Slip-on hydraulically balanced seal in types 707 and 808, interchangeable with conventional seals.
Description
A directly slip-on, hydraulically balanced seal design offering near-universal interchangeability with conventional seals and gland packings, without modification to the pump or gland.
Because no seal-induced shaft damage occurs, the hidden maintenance cost of shaft and sleeve repair or renewal is avoided. A high degree of standardisation keeps the price below conventional seals, and a uniform installation dimension across all sizes makes handling easier.
Two application-data sets are published: seal type 707 and seal type 808.
Specifications
| Size range — type 707 | 16 to 150mm |
|---|---|
| Pressure — type 707 | 35 bar |
| Temperature — type 707 | 205°c |
| Size range — type 808 | 108mm to 150mm |
| Pressure — type 808 | 35 bar |
| Temperature — type 808 | 205°c |
Summary envelope: shaft 16–150 mm · pressure to 35 bar
Materials of construction
- Type 707 seal faces: Carbon, Stellite, Plasma Sprayed Ceramic, Tungsten Carbide, Silicon Carbide
- Type 707 elastomers: EPDM, Neoprene, Viton, TEV, Kalrez
- Type 808 seal faces: Carbon, Stellite, Plasma sprayed ceramic, Tungsten carbide, Silicon carbide
- Type 808 elastomers: Viton®, Neoprene, Kalrez®, EPDM, TEV
Applications
- Industrial
- Marine