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FlexiLip (LFE) ,Multipurpose Double Lip Solid PTFE Rotary Shaft Seal for High Speed and Low Pressure
FlexiLip™ with primary sealing lip, secondary excluder lip. Retains fluid and excludes contaminants at speeds to 5000 fpm (25 m/s) and pressure to 60 psi. Optional metal support band for extended temperatures and shaft sizes over 4”.
Product Overview
Tech Specifications
Product Support
FlexiLip™ Solid PTFE Rotary Shaft Seals
Rotary Shaft Seals From Parker--Landing Page
FDA & NSF Compliant Seal Materials--EPS5250
Installation and Gland Design - FlexiLip Rotary Shaft Seals
PTFE Sealing Materials, Landing Page
Basic Sealing Technology-Spring Energized PTFE Lip Seals, Linear and Rotary
Sealing Technology Glossary of Basic Terminology
Design Action Request--DAR
Frequently Asked Questions
EPS Division, Marion, IATF 16949
EPS Division, Marion, ISO 9001:2015
Seal Storage and Handling Guide - Rotary Shaft Seals
Shelf Life for Elastomeric Seals
How They Work - PTFE Lip Rotary Shaft Seals
FlexiLip™ Solid PTFE Rotary Shaft Seal Selector Guide
Rotary Seal Product Offering/Selector
Parker's Sealing and Shielding blog
Parker's Sealing and Shielding blog
Description
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Parker’s FlexiLip™ seals utilize PTFE lip materials in rotary shaft applications where elastomeric lip materials fail to meet operating requirements such as temperature range, chemical resistance or friction and are an economical alternative to mechanical seals.
A mandrel formed primary lip dynamically seals on the shaft while the secondary excluder lip excludes contaminants. An O-ring centered on the OD keeps the seal fixed in the bore as the shaft rotates. For temperatures <0 or >250°F, or shaft size >4”, specify profile with integrated stainless steel support band (LFE-S).
Performance capabilities of solid PTFE FlexiLip rotary shaft seals include:
• Low friction
• High surface speed
• Wide temperature range, subject to limitation of elastomer O- ring
• Ultra broad chemical compatibility
• Dry running ability in dynamic sealing applications
• Resistance to degradation, heat aging and physical property alteration during temperature cycling (subject to limitation of elastomer O-ring)
LFE-N: Mandrel-formed primary ID lip with secondary excluder lip. O-ring centered in the OD for bore retention.
LFE-S: Mandrel-formed primary ID lip with secondary excluder lip. Integrated stainless steel support band. O-ring centered in the OD for bore retention.
Standard PTFE lip materials include:
• 0127, Mineral Filled PTFE — FDA compliant for rotary applications
• 0204, Fiberglass and MoS2 Filled PTFE
• 0301, Graphite Filled PTFE
• 0502, Carbon Fiber Filled PTFE
• 0615, Proprietary Low Wear PTFE
Shaft Diameter Limits: 0.750” to 12.000" (19 to 305 mm)
Cross-Section Limits:
LFE-N: Min: 0.250” (6 mm)
LFE-S: Min: 0.375” (9.5 mm)
Width Limits:
LFE-N: Min: 0.312” (8 mm)
LFE-S: Min: 0.375” (9.5 mm)
Maximum Pressure Limit: 60 psi (4.1 bar).
Note: Seals that are retained with an extrusion gap smaller than 0.020” (0.5 mm) will go to higher pressures than listed. Consult Parker EPS Division Engineering.
Maximum Surface Speed: 5000 fpm (25.4 m/s)
Maximum Shaft Dynamic Runout (TIR): 0.003”
Maximum (STMB) Misalignment: 0.005”
Typical Applications:
The versatility of Parker’s FlexiLip designs make it suitable for a wide range of applications including motors, gearboxes, pumps, bearings, compressors, cryogenics, rolls, extruders, valves, blowers, spindles, robotics, mixers.
Description
Performance Characteristics
Outside Diameter
O-ring Centered in the OD
Function
Fluid Retention and Contamination Exclusion
Size
0.750 to 12.000 inch
19 to 305 mm
Radial Cross Section Size
0.250 inch (minimum)
6.4 mm (minimum)
0.375 inch (minimum)
9.5 mm (minimum)
Minimum Width
0.312 inch
7.9 mm
0.375 inch
9.5 mm
Maximum Operating Pressure
7 to 100 psi
Maximum Surface Speed
> 3200 ft/min
> 16.3 m/sec
Maximum Shaft Runout
0.003"
Maximum Shaft-to-Bore Misalignment
0.005"
Minimum Operating Temperature
Varies (depending on material)
Maximum Operating Temperature
Varies (depending on material)
Thermal Application Type
Varies (depending on material)
Seal Type
O-ring OD
Shaft Seal Material
PTFE
FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS DESCRIBED HEREIN OR RELATED ITEMS CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY DAMAGE. This document and other information from Parker-Hannifin Corporation, its subsidiaries and authorized distributors provide product or system options for further investigation by users having technical expertise. The user, through its own analysis and testing, is solely responsible for making the final selection of the system and components and assuring that all performance, endurance, maintenance, safety and warning requirements of the application are met. The user must analyze all aspects of the application, follow applicable industry standards, and follow the information concerning the product in the current product catalog and in any other materials provided from Parker or its subsidiaries or authorized distributors. To the extent that Parker or its subsidiaries or authorized distributors provide component or system options based upon data or specifications provided by the user, the user is responsible for determining that such data and specifications are suitable and sufficient for all applications and reasonably foreseeable uses of the components or systems...
