Mechanical seal john crane
Type SAF
Double-acting Cartridge Seal for Heavy Equipment – Type SAF
The SAF is a double-acting seal particularly engineered to suit pumps, screens, knotters, sorters and pulpers in heavy process industries where liquids containing solid particles and impurities are involved. Seal design can be multi-component or cartridge version, depending on application. Size range varies from 0.787” to 17.716”/20mm to 450mm.
Typical OEM designs include brands: Andritz, Beloit, Bird, GL&V, IMPCO, Metso Paper, Netsch Mohno, Noss, Voith, Toscotec,SSP Pumps, Sulzer Pumps, Sunds Defibrator and Warman Pumps, etc.
Design is unaffected by pressure changes. The Type SAF seal is double-balanced, which makes the construction fully independent of pressure changes in both process and barrier fluid. It’s designed for minimum damage risk — the rugged construction for all applications prevents failure and provides long and trouble-free service. Type SAF seal provides easy installation and low maintenance costs. Ultimate reliability for screen sealing requirements. It is recommended to use Safeunit™ (plan 54) for seal water control.
Table Parameters Type SAF
| Temperature Limits | 350°F/180°C
|
|---|---|
| Pressure Limits | Stuffing box pressure: 290 psi(g)/20 bar(g)
Seal water pressure: 215 psi(g)/15 bar(g)
|
| Speed Limits | 100fps/30m/s
|
| Standard Materials | Seal faces: SiC/SiC (product side), SiC/Carbon (atmosphere side)
O-rings: PTFE (product side), EPDM, Viton
Metals: AISI 329 (standard), titanium, UHB
Springs: Nimonic steel |
Features Type SAF
- California Residents: PROPOSITION 65 WARNING
- Balanced, heavy-duty design
- Easy to install
- No fitting parts needed
- No measuring required
- Self-centering
Recommended Applications Type SAF
- Process pumps