Graphalloy® Bearings for Nuclear Applications available from FTL Technology
Graphalloy® has many applications for pumps in nuclear plants, including Graphalloy grade GM 111.3 (nickel grade) for outside re-circulation spray pumps
Read more...

General Enquiries	Literature Requests
Technical Enquiries	Direct Dial Numbers

Sign up for our "Update Service" and keep up to date with the latest news from FTL Technology.

Register for our Update Service

MECO HB Seal Model

For C.E.M.A Standard and Metric Screw Conveyors

What is MECO's HB Seal Model?

The MECO HB seal model is the best choice in sealing technology for screw conveyors. The HB model uses full contact, soft face mechanical shaft sealing innovations, sized for C.E.M.A. and metric standards.

The HB Seal model provides the superior performance, durability and quality of workmanship that are hallmarks of MECO’s many other highly-regarded custom seals. MECO’s first-rate customer service is provided for each HB seal sold.

When are HB Seals the Best Option?

MECO HB Seal model is ideal for screw conveyors, small blenders, bucket elevators, scrolls & similar rotating equipment used in bulk process industries. The HB Seal model is used on horizontal, inclined and vertical shafts for unsplit installations.

How Does the HB Seal Model Work?

The HB Seal replaces standard waste pack housings. It is made with a heavy, metal or FDA nylon housing that cannot be crushed by an over-tightened flange bearing. Two replaceable stainless steel stationary seal faces attach to the seal housing. Inside is a rotating seal face assembly, consisting of replaceable rotors and drive elastomer. The elastomer and rotors interlock, forming an air and watertight seal. The low friction rotating seal faces are at right angles to the shaft and in full contact with the stationary seal faces.

The HB Seal cavity is charged with low-pressure air or gas, which acts as a barrier fluid to provide pneumatic seal face loading. This is a simple and effective way to check installation integrity and monitor seal performance. HB Seals are manufactured to exacting standards, which ensure parallelism and flatness to maximize product containment and minimize barrier gas consumption.

What sizes are available?

The HB model seal is stocked in 5 standard inch and 11 metric sizes. These 16 seals can be easily converted for other shaft sizes and all fit within the five stocked housing (HSG) sizes. This allows the HB model seals to be sized for shaft diameters 4.07” (103mm) and smaller. See the Stocked HSG# Chart on Page 3 for maximum shaft size for each of the five housings.

What construction is available?

The HB seal’s rugged housing options are designed for long life. You may choose from three stock housing materials: FDA Nylon, Anodized Aluminum or 316L SS.

Two elastomer materials, Viton or FDA white silicone, ensure compatibility with nearly all applications. The standard stators are type 304 stainless steel. The standard rotors are MECO3000, a high-performance, bearing grade, polymerfilled PTFE with FDA approval. No abrasive filler material is added to MECO3000.

Any of the components may be individually replaced. Unsplit rebuild kits consisting of replacement rotors and drive elastomer are maintained in-stock for immediate shipment. In cases where it is difficult to remove the bearing or drive, convenient, fully-split rebuild kits are available.

Since Woodex’s MECO Seal division manufactures many custom shaft seals, we have the capability to fabricate from any material when required. See Sizing Chart on next page for dimensional information.