John Crane SB2A Dual-Cartridge Mechanical Seal with Double-Balanced Design for 350°F/180°C and SiC/Carbon Seal Faces
Price:
Negotiable
MOQ:
1pc
Delivery Time:
15 working days
Brand:
BESTSEAL
Product Description
John Crane Safematic SB2A-2.500-QTMG-303859 Mechanical Seal for ANSI Pumps
Type SB2A O-Ring Pusher Seals
Heavy-duty Dual-cartridge Seals
The Safeseal Type SB2A is a dual-cartridge seal. Its double-balanced design ensures the reliability and longevity of the seal in the most demanding conditions. The Type SB2A seal is ideal for use with environmentally hazardous and abrasive fluids, most often used in pumps in pulp mills, minerals processing and other slurry duties up to 40% solids by weight and a solids hardness of 8 Mohs. The Type SB2A seal is widely used with other process equipment including agitators.
Several variants of the design available for different services:
- Type SB2A — designed for ANSI standard dimensions
Features
- Seal faces are installed using a patented heat shrink process ensuring correct, distortion-free face alignment at all recommended temperatures.
- The springs are located in the stationary body of the seal in the seal water (barrier fluid). The seal water washes the springs, preventing process chemical corrosion and reduces the risk of the springs becoming clogged. Shaft misalignment does not vibrate or wear out the O-rings.
- PTFE slot rings replace the traditional O-rings in places where they are exposed to the product, preventing sticking.
- Protected faces, the seal face carriers are driven by machined fits, preventing metal stress from distorting the face.
- Patented double-balanced design allows the use of both pressurized and unpressurized seal water (barrier/buffer fluid) and prevents face overload.
- SB2 series seals will accept ± 0.080"/± 2.0mm axial movement (shaft end play) during normal operation due to their piston design. Impeller adjustments do not affect face stress or spring strength.
BESTSEAL — Your Reliable Partner for Mechanical Seals
| BESTSEAL Advantage: | |
| 15 years | Focused in mechanical seal manufacturing |
| 3 hours | Quotation response only takes 3 hours |
| 1 day | Provide production assembly drawings |
| 1 piece | MOQ, One piece can also be produced |
| 15-20 working days | The production cycle only takes 15-20 working days |
| real-time | Real time synchronization of production progress |
- BESTSEAL Cartridge Mechanical Seals
- Your Fast-Track Alternative to John Crane Type SB2A
- Custom Cartridge Mechanical Seals — From Drawing to Delivery in 15–20 Working Days
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Company
Hangzhou Bestseal International Trade Co., Ltd.
Location
Room 403, Building 2, No. 12, Shengdi Road, Yuhang Street, Yuhang District, Hangzhou, Zhejiang, China
Contact Person
Leo