Mechanical seal john crane
Type 20 - 20R
Chemically Inert Materials In All Areas and On All Surfaces – Type 20 – 20R
Types 20 and 20R shaft seals feature chemically inert materials in all areas and on all surfaces in contact with the liquid being sealed. Metallic components, springs and clamp ring are located outside the pump seal chamber, isolated from the process liquid.
For use with extremely corrosive chemicals, including concentrated acids and salts, strong oxidizing and reducing agents, and chemically active organic compounds commonly used on PTFE filled pumps.
The entire seal assembly and component parts employ mechanical drive to prevent slippage on the shaft or sleeve. Seal assembly is outside mounted and internally pressurized.
Product Description Type 20 – 20R
Types 20 and 20R shaft seals feature chemically inert materials in all areas and on all surfaces in contact with the liquid being sealed. Metallic components, springs and clamp ring, are located outside the pump seal chamber, isolated from the process liquid. Multiple springs are standard. A single spring design is available.
- For use with extremely corrosive chemicals, including concentrated acids and salts, strong oxidizing and reducing agents, and chemically active organic compounds commonly used on PTFE filled pumps
Table Parameters Type 20 – 20R
| Temperature Limits | -50°F to 250°F/-45°C to 121°C
|
|---|---|
| Pressure Limits | 150 psi(g)
|
| Speed Limits | Type 20: 1000fpm/5mps
Type 20R: 2600fpm/13mps
|
| Size Limits | 1"/25mm to 4"/101mm |
Features Type 20 – 20R
- California Residents: PROPOSITION 65 WARNING
- Maximum corrosion resistance.
- Eliminates possibility of seal face misalignment.
- Compensates for shaft runout to promote low maintenance, long-life operation.
- Independent spring assembly
- Replaceable primary ring (Type 20R) provides uniform face loading characteristics.
- Easy removal and replacement of sealing member most subject to wear.
Recommended Applications Type 20 – 20R
- Process pumps