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8/16/2019 B-Protech John Crane
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ProTechTM
The Full Ra ng e o f Bea ring Isola tors
Uniq ue Solutions fo r Exte nde d Bea ring Life
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ProTechTM
The Full Range of Bearing Isolators
ProTechTM
TechnologyThe unique ProTech technology has been developed over
a num ber of years to provide total bearing protection by
ensuring zero leakage of lubricant to atm osphere and total
exclusion of contam inants from the bearing housing. Lip
seals are prim arily designed to keep lubricants in, and are
not alw ays effective at keeping contam inants out. Surveys
have show n that even a tiny am ount of w ater or dirt in the
lubricant can drastically reduce bearing operating life.
Unique DesignThe ProTech bearing isolator is based on a sim ple, unitized, tw o-piece design
m anufactured in chem ically resistant PTFE. The ProTech range consists of
a com plete fam ily of com plem entary designs that provides outstanding
perform ance for virtually any application. A pplications w ith pressurized,
flooded, or sealed bearing housings can now benefit from ProTech Types
FS and FN , w hich feature an internal lip seal, again offering benefits of
zero leakage and zero entry of contam inants.
ApplicationsH igh-grade PTFE com posites in the construction of the standard ProTech range ensure a w ide
range of operating capabilities, including high and low tem perature and extrem e chem ical
environm ents. The use of alternative PTFE fillers extends the physical properties and capabilities
into such areas as food production and pharm aceuticals.
ProTech bearing isolators can norm ally
replace existing sealing devices, w ithout
m odification to the equipm ent. ProTech
w ill extend equipm ent operating life across
these industries:
•Chem ical Processing
•Pulp and Paper
•O il and G as
•M ining
•Food and Beverage
•Pharm aceuticals
•Pow er G eneration
•Steel and A lum inum M anufacturing
•Utilities
Patents: 5,316,317; 5,431,414; 5,552 ,601; 5,735,530; other patents pending.
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Wrap-Around Design–Type LX•Used w ith top-m ounted bearings on
vertical or angled shafts
•For severe w ash-dow n applications
Stepped Shaft Design–Type LM•Designed for electric m otors and stepped
shaft applications
Multiport Design–Type LD•Used w here the orientation of the
isolator cannot be guaranteed
•For contrarotating and rotating
housing applications
Severe Duty Design–Type SS•Ideal for high-speed double-row bearings
and severe oil-splash applications
Flush-Mounted Design–Type LN•Used w here space is restricted
ProTech High-Performance Bearing Isolators forStandard Oil and Grease-Lubricated Applications
Metal Construction–Type Millennium•Designed for higher speeds and tem peratures
General Purpose Design–Type LS•Flanged design
•Suitable for the m ajority of applications
UNITIZED DESIGN — ZERO LUBRICAN
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Fully Split Isolator
Plummer/Pillow Block Bearing Isolator
Advanced Design Isolator
Flooded Design–Type FS(Type FN f lush-mou nt ed d esign also available)
Used for:
•Herm etically sealed bearing housings
•Flooded or forced lubrication
•Low er bearings on vertical/angled shafts
•O il m ist lubrication system s
•Fan-cooled bearing housings
Split Pillow Block Design–Type LB•Direct upgrade for conventional bearing seals
•Ideal for taconite applications
•Suitable for grease and oil lubrication
Split Design–Type SL•Easy to install w ithout dism antling equipm ent
•Direct replacem ent for sealing devicesin plum m er/pillow blocks
•M inim al external space neededfor installation
AKAGE — ZERO ENTRY OF CONTAMINANTS
ProTech Specialty Isolators
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Features BenefitsTotal Exclusion of Contaminants Ensures longer bearing life.
from Bearing Housings
Zero Lubricant Leakage G reatly reduces required m aintenance
and environm ental pollution.
Unitized Two-Piece Design with Unique locking m echanism ensures com ponents
Positive Locking Mechanism cannot separate during installation or operation.
High Initial Axial Movement Capability Elim inates internal contact, a m ajor cause
of isolator problem s.
Manufactured from Engineered Accepted in all m ajor industries.
PTFE Composites PTFE is a low -friction, nonsparking m aterial,
w hich produces m inim al heat generation in
the unlikely event of contact (a claim not possible
w ith m etallic designs).
High chem ical resistance.
Manufactured to Suit Applications No m odifications required to rotating equipm ent
even w hen retrofitted.
Easy to Install No press or tools required, reducing the
possibility of dam age.
Component Standard Optional (for Food and Drug Appl ications)
Stator* G raphite-Filled PTFE Mineral-Filled PTFE
Rotor* G raphite-Filled PTFE Mineral-Filled PTFE
O -Rings Fluoroelastom er Silicone Elastomer
* Types FS and FN are supp lied w ith a stainless-steel rot or. Type M illennium is supp lied w ith a bronze stato r and rotor.
Materials of Construction
A pplies to all ProTech Bearing Isolators except w here stated.
Pressure 0 bar / 0 psi (Atm ospheric Pressure)
0.7 bar / 10 psi (for Types FS and FN)
Speed 0 to 25 m /s / 0 to 5000 fpmM odified designs are available at higher speeds
Temperature -40 to 120°C / -40 to 250°F
-40 to 200°C / -40 to 400°F (for Type M illennium )
Initial Axial Movement ± 0.8m m / ± 0.032 inches
Allowable TIR ± 0.5m m / ± 0.020 inches
Shaft Diameter 12 to 500m m / 0.5 to 20 inches
International Specifications •M eets and exceeds Severe D uty Electric M otor specifications
IEEE 841 for IP55 and IP56
•Com plies w ith A PI 610 8th edition
Please contact John Crane for app lications out side these limit s.
Performance Capabilities
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North America
Morton Grove, Illinois USA
Tel: 1-847-967-2 400
Fax: 1-847-967-3915
1-800-SEALING
Europe, Middle East, AfricaSlough, UK
Tel: 44-1753-224 000
Fax: 44-1753-224224
Asia Pacific
Singapore
Tel: 65-222-916 1
Fax: 65-223-5035
For the nearest J ohn Crane location, please conta ct one of the locations above.
If the products fea tured will be use d in a potentially da ngerous a nd/or hazardous proces s, your John Crane repres entative should be cons ulted prior
to their selection and use . In the interest of continuous development, J ohn Crane Co mpa nies rese rve the right to alter des igns and sp ecifications
without prior notice. It is da ngerous to smoke w hile hand ling produc ts ma de from P TFE. Old a nd new P TFE products mus t not be incinerated.
© 2000 J ohn Crane Print 1/00 www.johncrane.com IS O Certified B-ProTech
John Crane
Latin America
Sã o P aulo, Brazil
Tel: 55-11-820-41 46
Fax: 55-11-829-8270