7850
7850
The 7850 model is a maintenance-free seal designed for screw conveyors and bulk handling equipment, particularly in the food service, pharmaceutical, and chemical industries. It is constructed from 316 stainless steel, making it suitable for environments requiring caustic wash downs. The seal is engineered to handle temperatures ranging from -50F to 400F and accommodates linear shaft growth and radial shaft runout.
- Consumes 30% less power than traditional rope packing.
- Self-adjusting design eliminates the need for maintenance.
- Air purged with 5 to 8 PSI above vessel pressure to enhance seal life.
- Meets C.E.M.A. dimensions for easy installation.
The seal's core component is an elastomer molded from a special silicon material, designed to fit tightly around the shaft. This interference fit prevents product leakage and ensures the internal seal parts rotate with the shaft, avoiding shaft damage. The elastomer drives PTFE mineral-filled rotor cups against stationary faces to form the primary seal. The PTFE cups are designed to wear and be easily replaced with inexpensive rebuild kits.
- Ensure the shaft is clean of wear, dirt, oils, or grease before installation.
- Use mild soapy water or P-80 Rubber Lubricant for lubrication during installation.
- Align and secure the seal components as per the instructions, ensuring proper torque settings.
- Each seal requires a dedicated airline for air purging; sharing is not permitted.
Available accessories include seal repair kits, air pressure regulators, and automatic greasers. The repair kits allow for quick replacement of internal components, ensuring continued performance and longevity of the seal.
Catalog excerpts
Solids Solutions for Sealings Technology 7850Model Stainless Steel Sanitary Seal Click Here to Request A Quote The maintenance free 7850 model for screw conveyors and other bulk handling equipment is made out of 316 Stainless Steel to handle dry and slurry products in the food service, pharmaceutical and chemical industries where stainless steel is a requirement. Designed for C.E.M.A. screw conveyor and bulk handling equipment Manufactured out of 316 stainless steel to handle caustic wash downs Consumes 30% less power than rope packing Designed to handle linear shaft growth, and 1/4” total radial shaft runout Temperature ranges -50F to 400F Bolting pattern will accommodate flange mounted bearings Purge with air, 5 to 8 psi above vessel pressure, or silicone grease Zero maintenance due to unique self adjusting design
Open the catalog to page 1
The key component in the 7850 solid seal is the elas-tomer which is molded out of a special silicon material that can handle high temperatures. The elastomer is molded slightly smaller than the shaft size so that an interference fit is achieved. It is the interference fit of the elastomer and shaft that not only seals the shaft so product can’t migrate past and leak out, but it also causes the internal seal parts to turn with the shaft so that damage to the shaft is eliminated. As the elastomer turns with the shaft it drives a pair of PTFE mineral filled rotor cups against two stationary faces...
Open the catalog to page 2
Solids Solutions for Sealings Technology 7850 Seal Installation If you have any questions before you begin your installation please call 1-856-662-5162 Shaft should be totally clean of any wear, dirt, oils or grease before installing the seal. Carefully remove seal from shaft. *Use mild soapy water for lubrication or P-80 Rubber Lubricant Emulsion. Contact Us Watch Our Seal Installation Video Installing the 7850 Seal 1. The shaft should be totally clean of any wear, dirt, oils or grease before installing the seal. 2. Be sure O-ring is seated properly on inboard of seal. 3. Orient seal with O-ring...
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