Category Archives: Food Processing

PUR-GARD™ FDA-Compliant Seals for Food Processing

PUR-GARD™ FDA Compliant Seals

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Garlock PUR-GARD™ FDA Compliant Seals for Food Processing

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PUR-GARD FDA-Compliant Seals

Garlock's PUR-GARD FDA compliant seals, available from Web Seal, are the newest bearing isolator seal in Garlock's FDA-compliant Klozure® series.

The unique Cam-Lock O-ring groove design includes a 316 stainless steel stator and rotor and FKM O-rings, with a unitizing ring that eliminates metal-to-metal contact between the stator and the rotor.

This non-contact assemblage reduces both energy use and shaft drag.[/floatbox]

PUR-GARD™ FDA-compliant seals use a patented labyrinth design that meets IP66 (ingress protection) standards and provide superior sealing solutions for rotating equipment in food and beverage processing applications.

Designed with materials that are FDA-compliant, metal detectable and x-ray inspectable, PUR-GARD bearing isolator seals are a new type of seal that improve overall process purity and safety, even in the most challenging environments.

These bearing isolator seals are typically used in pumps, motors, gearboxes and other rotating equipment exposed to heavy wash down and /or zone 1 and 2 applications. They can withstand temperature ranges of -22°F to 400°F (-30°C to 204°C), surface speeds to 12,000 FPM max (60.9 m/s), axial motion to +/-0.015" (0.38mm), and ambient pressure.

Downtime and maintenance concerns are often caused by the effects of daily wash down processes wearing away bearings and equipment. High-pressure sprays and dust particulates are also problematic. The improved sealing technology of PUR-GARD™ isolator bearing extends the life of processing equipment, saving substantial time and costs while providing the highest safety and product integrity.

Installation is easier also, with an assembled construction that will not come apart during installation, can be simply installed hand without the need for an arbor press tool.

Web Seal can provide PUR-GARD bearing isolator seals in various configurations, including flanged, split option, vertical, step shaft, split pillow block, small cross-section (all IP66), flangeless and flangeless narrow width (both IP55).

More information about Garlock's PUR-GARD™ FDA-Compliant Seals is available from Web Seal or on the Garlock website. You can also download a PUR-GARD™ bearing isolator PDF brochure.

A variety of ProTech bearing isolator sealsr Seals

ProTech™ Bearing Isolator Seals

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Parker’s ProTech™ bearing isolator seals feature a unique labyrinth design that provides unmatched two-way sealing for both zero lubricant leakage and total exclusion of contaminants.

Its advanced proprietary PTFE compounds make ProTech well-suited for caustic, high-speed, and high-temperature environments. These highly chemical-resistant seals perform well in high-speed and high-temperature environments.  For example, ProTech is well suited for caustic environments such as citric acids in juice processing and strong sulfides in pulp and paper processing.

This bearing isolator is a unitized, two-piece non-contact design that offers extended bearing life.    It is this characteristic labyrinth technology that provides contaminant exclusion instead of an internal O-ring protection. 

ProTech™ bearing isolator seals offer an answer for applications where improving the mean time between failure (MTBF) is critical. The ProTech family relies on true non-contact labyrinth seal technology to provide 100% exclusion of contaminants and 100% retention of bearing lubrication for the life of the bearing. 

The superior quality and high performance of ProTec™ seals make it the ultimate in bearing protection.  Parker, the innovation leader in bearing isolator technology, has designed this unique sealing component to deliver maximum protection for a multitude of applications.

Web Seal can provide ProTech seals in many standard and custom designs, with support to ensure that the proper isolator for your equipment and application is recommended. Expedited delivery is available.

Characteristics of ProTec Bearing Isolator Seals

  • Unmatched corrosion resistance  
  • Allows for standardizing a single material in your plant
  • Extends bearing life as the unique technology eliminates wear associated with internal O-rings, PTFE elements, or other locking rings
  • Zero lubricant leakage
  • Total exclusion of contaminants, including dirt exclusion and oil retention
  • Multiple design availability, with more than a dozen standard and several custom configurations, allows for ease of retrofitting most equipment
  • The Millennium® metallic-style profile is available in bronze, 302 SS, 304 SS, 316 SS, and carbon steel
  • The ProTech 360 is designed for flooded oil and oil mist applications
  • Independently tested to IEEE IP55, IP56, and IP66
  • ProTech WD design for the food processing area meets IP69k
  • Exceeds IEEE-841 for electric motors
  • ProTech 360 design (flooded), for tough gearbox applications including vertical down
  • Typical size range is for shaft diameters from 0.492″ (12.5 mm) to 38″ (965 mm)