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.

RB3 with Circulation, Vent & Drain Gland

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.