Heavy Duty Slurry, Gas, Mixer/Agitator Seals, Welded Metal Bellows

Inert gas enters in the wide, deeper grooves on the OD of the rotating seal ring face. As the shaft rotates, the gas compresses as it passes through the narrowing of the seal ring’s spiral grooves. The resultant gas film pressure provides an opening force slightly greater than the net closing forces, which cause the faces to separate and not contact.

The FHDS series is a heavy duty stationary multi-spring single cartridge seal design for industry’s most challenging slurry applications. Flex-A-Seal’s unique design allows for increased seal reliability, flushless operation if required, lower operating costs, and an economical two piece construction when exotic metallurgies are required.

There is no one universal seal for all mixer applications. Every mixer, agitator, and reactor model is distinctive and engineered for a specific application. Successful sealing is established by clearly defining the type of equipment, the product, and the sealing conditions. We offer innovative solutions for your toughest challenges.

Superior Performance – The welded metal bellows static shaft O-ring eliminates the traditional problems of seal hang up and shaft fretting common to pusher seal, dynamic elastomer. Hydraulically balanced seal. Allows seal to handle more pressure without heat buildup. Self-cleaning-centrifugal force throws solids away from seal. Fits narrow cross section stuffing boxes. Available in metric and DIN sizes. Even face loading – bellows core flexes, allowing for full 360 degrees closing force. Extensive metallurgy, insert, and elastomer selection to service every application. AM350 and Hastelloy® C276 bellows core standard, other material options available.

High temperature sealing solutions . Hydraulically balanced seal with even 360 degree face loading. Allows the seal to handle more pressure without generating excessive heat at the faces. All metal parts are designed to handle elevated temperatures without adverse effects: heat treated AM350 or Alloy 718 bellows, low-expansion alloy seal face retainer, and 316 stainless steel hubs and housings. Other material options are available. Static shaft grafoil packing For higher pressure applications, double ply bellows are available Cartridge designs are available