Chesterton 250 250L General Purpose Double Cartridge Mechanical Seal for ANSI ISO Process Pumps
- Mechanical Seals
- Cartridge Seals
Simple Installation and Increased Reliability for General Duty Applications
The 250 Double Cartridge Seal provides sealing security that packing and conventional single mechanical seals cannot match. With a compact cartridge profile designed to fit standard ANSI/ISO process pumps, the seal is designed to install easily and reliably. The single screw clamp lock ring design (250L) further increases efficiency and reduces installation error.
Introducing optimized seal face geometry engineered through computer modeling and a durable double balanced design, the seal is engineered with improved lubrication, helping the seal to run cooler and longer. With proven Chesterton reliability, the 250 Double Cartridge Seal is an economical upgrade to increase the life of your equipment.
- Economical upgrade from packing and single mechanical seals
- Field repairable cartridge design
- Increased barrier fluid flow to maximize cooling and reliability
| Size Range | 25 mm to 120 mm (.938 inch to 4.750 inch) |
|---|---|
| Standards and Approvals | ISO-3069C, ASME B73.1, ASME B73.2 |
| Variants | 250L: Single Screw Clamp Lock Ring 250OS: Oversized Seal Chambers |
| Faces | CB, TC, SSC |
|---|---|
| Elastomers | FKM, EPDM, FEPM, FFKM |
| Metals | EN 1.4401 (316SS), Other Metallurgies available on request |
| Springs | EN 2.4819 (Alloy C-276) |
| Temperature | -30 to 205 °C (-20 to 400 °F) |
|---|---|
| Speed | 20 m/s ( 4000 fpm ) |
| Pressure |
711 mm (28") Hg Vacuum – 20 bar g (300 psig) |
| Notes |
Seal pressure capabilities are dependent on the fluid sealed, temperature, speed, and seal face combinations. For operation outside the limits and additional materials consult BESTSEAL. |
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