Mechanical Seals

Style RB1

Single Rotating Welded Metal Bellows Cartridge with Circulation Gland

• Part of Flex-A-Seal’s integrated/platform single cartridge seal design;
• Patent pending Plunger-Lock drive;
• Most economical welded metal bellows seal alternative;
• Only two static O-rings – cost savings are substantial when perfluorelastomers are required;
• Rotating welded metal bellows - self cleaning;
• Simple cartridge seal installation requires no dimensions to be taken. Slide on, bolt to box face, tighten set screws, and remove spacers;
• Hydraulically balanced design;
• No moving elastomers. No fretting - No hang-up;
• Minimal number of parts. Simple design means fewer pieces to cause problems;
• Fits all ANSI standard and big bore pumps;
• Metric sizes readily available;
• Sleeve is isolated from product;
• Quick inexpensive repairs.

• All the benefits of the RB1 design plus vent and drain gland with throttle bushing
• Pipe connections are made to different sizes to assure that correct piping plans are employed
• Cost-effective “upgrade”

Operating Conditions

Max Temp - 400ºF (204ºC)
Max Pressure - 300 PSI (20 bar)
Max Speed - 4500 FPM (22 m/sec)

Note: Max Temperature / pressure / speed indicate operating extremes independently and do not imply the seal will function at these extremes at the same time. Contact Flex-A-Seal if in doubt.