Seal Proof Engineering
Technical datasheet
Mechanical Shaft Seals
Cartridge Double Acting
Back-to-back double cartridge seal on pressurised barrier fluid, for chemicals and their vapours.
Description
A balanced, back-to-back double-acting cartridge unit operated with a pressurised barrier fluid, independent of direction of rotation.
Used on petrochemicals, general chemicals and light hydrocarbons and their vapours. The inboard secondary seal is PTFE or GFT; the outboard secondary seal is elastomer.
Specifications
| Seal characteristics | Double acting back-to-back seals · Balanced · Cartridge unit · Independent of direction of rotation · Operated with pressurised barrier fluid |
|---|---|
| Pressure p | Vacuum …. 35 bar (max) |
| Temperature t | Ambient to +200°C (max) † provisional |
| Shaft speed n | 600 rpm. (max) |
| Barrier fluid pressure | Vessel pressure + 1.5 bar |
Summary envelope: pressure to 35 bar
Materials of construction
- Face materials: Carbon, Ceramic, Silicon Carbide, Tungsten Carbide, Lecrolloy
- Metal parts: SS 316, SS 304, Carbon Steel, Hastelloy-B, Hastelloy-C, Monel, Alloy – 20
- Secondary seal: Inboard – PTFE, GFT; Outboard – Elastomers
Applications
- Petrochemicals and its vapours
- General chemicals and its vapours
- Light hydrocarbons and its vapours