Floating Seals Freudenberg and NOK Group
Floating Seals ES Series
Yo u r Te c h n o l o g y S p e c i a l i s t
Simrit Sealing Solutions
Simrit is the industrial sealing products division of the
The Simrit service package at a glance:
Freudenberg and NOK Group Companies, a global
supplier of elastomeric seals and custom molded products, World’s largest product range—Superior design
with production facilities in 25 countries and annual solutions from a single source.
sales of over $12 billion in the service of all major Continuous innovation —Technological prominence
technology industries. gives our customers competitive advantage.
While known for supplying superior sealing products with Unique expertise in materials and high-quality standards
a history that spans over 150 years, Simrit is always —The end-to-end leader for safe, cost-effective applications.
looking toward the future. Innovation is the cornerstone A vast range of integrated services —Holistic support
of our company and we strive to bring that pioneering from development through product deployment.
spirit to practical reality for our customers every day.
“Globality”—Global expertise united with the knowledge
Our expert engineers are dedicated to open and instant
of local market requirements and customer demands.
information exchange throughout the entire Freudenberg
and NOK global network. It’s our way of ensuring that
only the very “best of breed” solutions rise to the surface.
ES Series Floating Seals
Earth-moving and heavy construction equipment constantly For heavy equipment sealing, Simrit offers the ES series
undergo the stresses of the job environment and service of floating seals designed and manufactured by Eagle
conditions require robust mechanical systems. Moisture, Industry Co. Ltd. As part of the Freudenberg and NOK
natural contaminants such as sand and fiber, harsh Group, Eagle Industry Co. brings our customers nearly
weather including radical temperature fluctuation, ozone, 50 years of floating seal experience, providing the highest
and extended UV radiation are just some of the challenges quality seals available.
to a system’s integrity. When there is no room for error, Benefits of using Simrit ES Series Floating Seals include:
when “time is money,“ seal system performance must
Strong seal performance
remain optimal. Simrit, your technology specialist, provides
the best solution in the industry. Excellent contamination resistance
Longer intervals between services
Lower labor and maintenance costs
The Freudenberg and NOK group draws from more
than 150 years of experience and offers quality,
well-known brand names including Freudenberg ®,
NOK®, Eagle Industry, International Seal®, and
Merkel™. Call Simrit today at 1-866-274-6748 to find
out how our total sealing solutions can benefit you.
Or visit www.simrit.com.
1
Floating Seal Characteristics
Simrit floating seals are noted for their reliable seal Setting Length
endurance characteristics. In laboratory tests simulating
actual field service conditions (i.e., muddy water) at
1 m/s for over 1000 hours, track roller assemblies Service Limit
showed no leakage and essentially no seat wear using
standard 80W-90 gear oil as the lubricant. There was Initial Tolerance
also no noticeable deformation or deterioration of
elasticity in the floating seal O-rings.
Simrit floating seals are designed to operate under the
following conditions:
Lubricant pressure within seal cavity of 1.5 kg/cm2
(maximum 2 kg/cm2)
Circumferential speed of 2 meters/second, maximum
Temperature range:
Standard Load Curves
–40°C to +100°C for standard materials
For particular requirements that do not fit the above
specifications, please contact Simrit to find the right +2.5 +2.0 +1.5 +1.0 +0.5 0 –0.5 –1.0
solution for your individual applications. Setting Height (mm)
Installation of the Simrit floating seals requires a
recommended setting height of +/–0.5 mm, but they
will continue to function beyond these parameters
during normal service life.
Simrit ES Series Floating Seals from Eagle Industry Co. and testing, including custom designs for the most
offer dependability in the most demanding conditions. challenging applications. Design validation includes
As the only manufacturer of both energizers and lab testing, field return analysis, and design variation
metal seal rings, our expertise spans product design testing to ensure optimum performance.
2
Floating Seal Materials
The effectiveness of floating seals is dependent on the Hydrogenated Nitrile (HNBR)
combination of tough materials used in a unique configura- Description: HNBR is obtained by partially or fully
tion of the floating seal and the O-ring. As the world’s hydrogenating NBR, leading to considerable improve-
leading elastomer developer, Simrit can provide the best ment of the resistance to heat, ozone, and aging.
material to match the requirements of each application.
Temperature Range: –40°C to 120°C
Floating seals consist of two basic components,
Standard Fluoroelastomers (FKM)
the metal seat and the elastomer.
Description: FKM compounds provide excellent
resistance to petroleum products and solvents,
Elastomer Elastomer delivering very good high-temperature performance.
Limitations: Avoid polar solvents, amines, anhydrous
Floating Seal Seat ammonia, SKYDROL, hydrazine, and hot acids.
Temperature Range: –20°C to 200°C
Floating Seal Seat Material Low Temperature Fluoroelastomers (FKM)
Special corrosion-resistant cast iron alloy Description: Like the standard fluoroelastomer, the
low-temperature compound has excellent resistance
O-Ring Elastomer Materials to petroleum products and solvents, and very good
Nitrile (NBR) high-temperature performance; but in addition, there
is an extended low-end temperature advantage.
Description: Commonly used because of its good
mechanical properties and low cost, standard nitrile Limitations: Avoid polar solvents, amines, anhydrous
is also known as Buna-N. It has excellent resistance ammonia, SKYDROL, hydrazine, and hot acids.
to petroleum-based oils and fuels, water and alcohols. Temperature Range: –40°C to 200°C
Nitrile also has good resistance to acids and bases,
except those with a strong oxidizing effect.
Limitations: Avoid highly polar solvents (Acetone,
MEK, etc.) and direct exposure to ozone and sunlight.
Temperature Range: –50°C to 100°C
Floating Seals Materials Comparative Temperature Ranges
Nitrile (NBR)
Hydrogenated Nitrile (HNBR)
Standard Fluoroelastomer (FKM)
Low-Temp. Fluoroelastomer (FKM)
Temperature °C –50°C 0°C 50°C 100°C 150°C 200°C 250°C
Simrit’s 55,000-square-foot Technology Center based in
Plymouth, Michigan, is a $25 million marvel of state-
of-the-art testing capabilities. Our engineers develop
and extensively test materials in collaboration with the
finest chemists from our lead centers throughout the
world. New material compounding for target
applications is part of this continuous process.
3
Installation and Maintenance of Floating Seals
Long-term endurance testing on Simrit floating seals Step Two: Install the floating seal with the properly fitted
demonstrates that properly installed seals in track roller O-ring in the housing (Diagram 2). At this time, confirm
applications provide over 3000 hours of maintenance- that the end of the housing (A in the diagrams) will be
free performance without the need for oil replenishment.
Correct installation of the seal is critical to long service A A
life. If at any time the assembly housing or floating seal
is disassembled, a new seal should be installed before B
reassembly and use of equipment. Failure to do so may B
result in oil leakage and a shortened seal life.
Proper Method of Seal Installation
Step One: Be sure that the installation opening of the
housing is clean and clear of burrs, scratches, and dust.
The O-ring must be correctly fitted on the floating seal
without distortion (Diagram 1).
Diagram 2 Diagram 3
parallel to the sliding surface of the floating seat (B).
If the seal comes out of alignment, even partially
(Diagram 3), abnormal wear and deformation of the
O-ring will result, shortening the service life of the seal.
Step Three: After insertion, make sure that the sliding
surfaces are absolutely free of foreign matter, then
lightly apply lubricant oil to the sliding surfaces. Upon
completion of the seal installation, reassemble the
housings and fill with lubricating oil.
Diagram 1
When properly installed, the two mated metal surfaces
seal against each other for maximum sealing. A thin
film of lubrication between the surfaces minimizes
wear. The O-ring energizers provide pressure to
ensure positive sealing.
4
Type ES100 Floating Seal
The ES100 floating seal was developed as a seal for the
Type ES100 Seal Cross Section
track rollers used in construction machinery and vehicles.
It is simple in construction, consisting of O-rings and
floating seats made of special cast iron. Its performance is
dependent on the sealing capabilities and elastic distortion
of the O-rings, as the floating seats are supported by the
O-rings. The seal effectively excludes sand, dirt, and
water and is widely used in bulldozer and excavator under-
carriage applications. The ES100 is generally the most
common and most cost-effective solution, but requires
precise machining of the housing bore (see page 7).
ES100 Seal Construction
The seal seat is a special alloy cast iron. The O-ring
component is standard material NBR A627, or optional
materials, FKM F201 and HNBR G969.
Specifications–Standard Material
Lubricant pressure within seal cavity: 2 kg/cm2, maximum.
Circumferential speed: 2m/sec., maximum
Temperature range: –40°C to 100°C
Fluid retained: lubricating oil
Foreign material excluded: soil, sand, mud, water, etc.
Sizes: 38 mm to 429 mm (inside diameters)
5
Type ES764 Floating Seal
A sister product of the type ES100 seal, the ES764
Type ES764 Seal Cross Section
allows for a simpler housing design and construction.
The housing is easier to machine (see page 9), but more
housing space is required and fewer tooled sizes are
available. This economy of design provides reduced
manufacturing costs in agricultural equipment and other
field machinery. The ES764 has a higher pressure
capability and range compared to the type ES100 seal.
The type ES764 seal utilizes a unique wing-form
elastomeric packing with floating seats made of special
alloy cast iron.
ES764 Seal Construction
The seal seat is a special alloy cast iron. The O-ring
component is standard material NBR A627.
Specifications, Standard Material
Lubricant pressure within seal cavity: 3 kg/cm2, maximum
Circumferential speed: 2m/sec., maximum
Temperature range: –40°C to 100°C
Fluid retained: lubricating oil
Foreign material excluded: soil, sand, mud, water, etc.
Sizes: 35 mm to 96 mm (inside diameters)
6
Type ES100 Floating Seal Sizes
L1 L3
R3 no sharp edge
L2
R4
R2 R1
3.2 L5
6.3
L4 L6
D1 D2 D3 D5 D4 D6 D7
Seal Dimension Reference Housing Dimension Reference
Metric Dimensions (mm)
Type & D2 D1 D3 L1 D4 D5 D6 D7 L2 L3 L4 L5 L6 R1 R2 R3 R4 O/R
Size max. ref. ref. ref. ±0.5 ref. ±0.1 ±0.1 ±0.5 ±0.2 ±0.5 ±0.2 ref. ±0.2 ±0.1 ±0.2 ±0.2 ±0.5° WD
ES100-38 35 38 51 10 46 51.2 53 53.7 3 9 2 1.6 0.4 0.2 2 1 0.5 10 6
ES100-45 42 45 58 10.5 53.4 58.7 60.8 61.6 3 10 2 1.8 0.5 0.3 2.5 1 0.5 10 6.4
ES100-48 45 48 62 12.5 58 64.4 67.2 68 3 12 2 2 0.5 0.3 3 1 0.5 10 7.5
ES100-51 48 51 65 11.5 60 65.4 67.4 68.2 3 10 1 1.9 0.5 0.3 2.5 1 0.5 10 6.7
ES100-56 53 56 70 13.2 66 72.5 75.2 76 3 12 2 2 0.5 0.3 3 1 0.5 10 7.7
ES100-58 55 58 75 13.5 67 75.2 78.6 79.4 3 13.5 2 2 0.5 0.3 3 1 0.5 10 8.6
ES100-60 57 60 74 10.9 70 75.4 77.4 78.4 3 9 2 1.9 0.35 0.3 2.5 1 0.5 12 6.4
ES100-63.5 60.5 63.5 82 16 74 82.6 86 86.8 3 15 2 3 1.2 0.5 4 1 0.5 10 9.6
ES100-64 61 64 78 13.2 74 80.2 83.8 84.6 3 12.5 2 2 0.5 0.3 3 1 0.5 12 8.1
ES100-66 63 66 86 14 78 85.8 89.2 90 3 14 2 2 0.5 0.3 3 1 0.5 10 8.9
ES100-69 66 69 84 12.5 78.5 85.7 88.6 89.6 3 11 2 1.9 0.35 0.3 2.5 1 0.5 12 7.9
ES100-70 67 70 90 14.5 84 90.6 94.7 95.5 3 13.5 2 2 0.5 0.3 3 1 0.5 12 9
ES100-73 70 73 92.1 16 84 92.1 95.4 96.2 3 15 2 3 1.2 0.5 4 1 0.5 10 9.4
ES100-76 73 76 94 14.5 89 97 100.6 101.4 3 14.5 2 2 0.5 0.3 3 1 0.5 10 9.3
ES100-80 77 80 100 14.5 92 100.5 104.2 105 3 14.5 2 2 0.5 0.3 3 1 0.5 10 9.3
ES100-82 79 82 98 13 91 98.9 101.3 102.3 3 12.5 2 2.8 0.6 0.5 5 1 0.5 10 8
ES100-90 87 90 109 16 100 107.7 112 112.9 3 14.5 2.5 2.1 0.5 0.3 3 1 0.5 12 9.2
ES100-90.1 87.5 90.1 109.5 16 101 109.5 112.8 113.6 3 15 2 3 1.2 0.5 4 1 0.5 10 9.7
ES100-95 92 95 114 16 107 114.8 119.2 120 3 15 2 2.5 1 0.5 3 1 0.5 12 9.5
ES100-100 97 100 118 16 111 119.3 122.4 123.2 3 14.5 2 2.5 1 0.5 3 1.5 0.5 10 9.5
ES100-102 99 102 122 16.7 115 121.8 126.2 127.2 3 15.5 2 2.5 0.8 0.5 3 1.5 0.5 12 9.3
Important note: Not to be used for specification purposes. These values serve only as a guide for engineering design. Specification subject to change
without advance notice.
7
Type ES100 Floating Seal Sizes —continued
Type & D2 D1 D3 L1 D4 D5 D6 D7 L2 L3 L4 L5 L6 R1 R2 R3 R4 O/R
Size max. ref. ref. ref. ±0.5 ref. ±0.1 ±0.1 ±0.5 ±0.2 ±0.5 ±0.2 ref. ±0.2 ±0.1 ±0.2 ±0.2 ±0.5° WD
ES100-109 106 109 132 16 124 132.1 135.6 136.6 3 15.5 2 2.5 0.8 0.5 3 1.5 0.5 10 9.5
ES100-110 107 110 128 16 121 127.7 132 133 3 15 2 2.5 0.8 0.5 3 1.5 0.5 12 9
ES100-115 112 115 137 15.5 130 137.6 140.8 141.8 3 14.5 2 2.5 0.8 0.5 3 1.5 0.5 10 9.2
ES100-120 117 120 142 19.5 133 143.8 148 149 4 17 2 2.5 0.8 0.5 3 1.5 0.5 10 11
ES100-127 124 127 141 12.5 136 140.8 143.2 144 4 11.5 2 2.5 1 0.5 3 1 0.5 10 6.4
ES100-130 127 130 152 19.2 144 153.4 158 159 3 18.5 2 2.5 0.8 0.5 3 1.5 0.5 10 11.3
ES100-137 134 137 153 15 152.1 155.9 159 159.7 4 13 2 2.5 1.2 0.5 2.5 - - 10.5 9.2
ES100-143 140 143 157 12.5 152 156.7 158.9 159.7 4 11.5 2 2.5 1 0.5 3 1 0.5 10 6.4
ES100-146 143 146 168 19 159 171.7 175.8 176.8 4 18 2 3 1 0.5 4 1.5 0.5 10 12.7
ES100-148 145 148 170 17 164 171.3 174.6 175.6 4 15 2 2.5 0.8 0.5 3 1.5 0.5 10 9.6
ES100-150 147 150 172 20 165 173.5 178 179 4 18 2 2.5 0.8 0.5 3 2 0.5 10 11.3
ES100-154 151 154 168 13 164 167.8 170.2 171 4 11.5 2 2.5 0.8 0.5 3 1 0.5 10 6.3
ES100-155 152 155 177 20 170 179.4 184.6 185.6 4 20 2 2.9 1 0.5 4 1 0.5 10.5 12
ES100-163 160 163 188 19 178.6 191.1 195.4 196.4 4 18 2 3 1 0.5 4 2 0.5 10 13.1
ES100-178 175 178 200 19 192 205 209.6 210.6 4 19 2 3 1 0.5 4 2 0.5 10 13.1
ES100-182 179 182 207 18 197.6 210 214.4 215.4 4 18 2 3 1 0.5 4 2 0.5 10 13
ES100-188 185 188 205 14 199 207.1 209.5 210.5 3 12.5 2 2.5 0.8 0.5 3 1 1.5 10 8.3
ES100-192 189 192 215 17 207 216 219.8 220.8 4 16.5 2 3 1 0.5 4 2 0.5 10 10.4
ES100-204 201 204 225.5 16 218 227.4 230.5 231.5 3 14.5 2 2.5 0.8 0.5 3 1 1.5 10 9.5
ES100-209 206 209 234 21 224 236.6 241.6 242.6 4 19.5 2 3 1 0.5 4 2 0.5 10 13
ES100-220 217 220 246 20.5 236 248.3 253.6 254.6 4 20.5 2 3 1 0.5 4 2 1 10 13
ES100-225 222 225 252 18.5 241 252.1 257 258 4 19 2 3 1 0.5 4 2 1 10 12
ES100-239 236 239 268 20 257 268.6 273.2 274.2 4 19 2 3 1 0.5 4 2 1 10 12
ES100-250 247 250 276 22 266 278.4 283.6 284.6 4 20.5 2 3 1 0.5 4 2 1 10 13
ES100-265 262 265 290 18.5 280.2 292.5 296.9 297.9 4 18.5 2 3 1 0.5 4 2 1 10 13
ES100-300 297 300 328 20 315 327.1 332 333 4 19.5 2.5 3 1 0.5 4 2 1 10 12.5
ES100-318 315 318 343 18.5 333.8 346.1 350.6 351.6 4 18.5 2.5 3 1 0.5 4 2 1 10 12.7
ES100-340 337 340 369 20.2 358 369 373.8 374.8 4 19 2.5 3 1 0.5 4 2 1 10 12
ES100-356 353 356 381 19 370 384.2 388.5 389.5 4 18.5 2.5 3 1 0.5 4 2 1 10 12.7
ES100-366 363 366 391 18.5 381.8 394 398.5 399.5 4 18.5 2.5 3 1 0.5 4 2 1 10 12.7
ES100-429 426 429 454 18.5 444.6 456.9 461.3 462.3 4 18.5 2.5 3 1 0.5 4 2 1 10 12.7
Important note: Not to be used for specification purposes. These values serve only as a guide for engineering design. Specification subject to change
without advance notice.
8
Type ES764 Floating Seal Sizes
L1
L2 L2
L3
2
L4
Max R 0.5 2 Max R 0.5
30° 30°
3.2
6.3
C1
D1 D3 d D3 D2
Seal Dimension Reference Housing Dimension Reference
Metric Dimensions (mm)
Type & d D1 D2 D3 L1 L2 L3 L4
Size max. ref. ±0.07 ±0.5 ±0.5 ±0.2 min. max.
ES764-35 32 34.5 56 46 18 7.5 1.5 19
ES764-46 44 45.5 66 56 20 9 1.5 18
ES764-53 50.5 52.5 76 66 15 6 2.3 17.2
ES764-60 57 59.5 86 73 20 8.5 1.5 21
ES764-73 70 72.5 101 87 22 9.5 1.5 21
ES764-84 81.8 83.5 114.3 97.36 25.81 12.06 0.38 23
ES764-96 88.9 95.5 125.81 109.12 27.84 12.98 1.5 26.6
Important note: Not to be used for specification purposes. These values serve
only as a guide for engineering design. Specification subject to change without
advance notice.
Your online connection to finding a particular
Simrit product is www.simrit.com. Our full-service
website features client log-in, order tracking, and
expert support. Log on for access to the complete
catalog of approximately 500,000 Simrit parts
featuring over 250,000 cross-reference numbers.
9
Sealing Solutions from Simrit
Whatever application you choose, Simrit will meet or
surpass your production demands. We provide total
sealing solutions with one-stop shopping for all your
sealing needs. Simrit offers product availability,
engineering expertise, and advanced technology that
exceeds industry standards. Not only do we supply the
highest quality products on the market, but our efficient
global network and production facilities also make us
cost competitive. O-rings, shaft seals, Plug & Seals, and
a complete line of fluid power seals are just some of the
superior products available from Simrit.
Fluid Power Products
Simrit provides a large variety of fluid power products in
standard and non-standard sizes, with standardized
cross-sections, including rod seals, piston seals, wiper
seals, wear rings, and backup rings. We feature:
Disogrin ® polyurethane materials
Quantum™ PTFE materials
Simrit Xpress™ seals
Disogrin ® O-rings
ISC O-Rings
Simrit offers off-the-shelf availability for standard O-rings.
Merkel hydraulic components
We supply Disogrin ® polyurethane O-rings, the highest
standard in the industry for toughness, tear strength,
Shaft Seals reliance, extrusion resistance, and compression set,
providing positive, leak-free sealing up to 10,000 psi.
Simrit provides shaft seals in standard and non-standard
Simrit O-ring materials also include:
sizes in a wide variety of materials.
Ethylene propylene (EPR/EPDM)
Patented crankshaft seal designs
Fluorocarbon (FKM)
PTFE crankshaft seals
Fluorosilicone (FVMQ)
Special two-piece valve stem seals
Hydrogenated nitrile (HNBR)
High-performance cassette seals
Liqui-Last™ (pFKM)
Track roller seals
Nitrile (NBR)
Silicone (VMQ)
Simriz® perfluoroelastomer (FFKM)
Plug & Seals. Designed as rubber-coated pipe sections,
Plug & Seals create a safe, leak-free connection between
housings. Reliable even under high pressure, Plug &
Seals are a secure, low-cost solution for the transport of
air, water, and oils. They can combine several functions
in a single component and compensate for conduit
misalignment and tolerance variations. Plug & Seals
are available in a wide variety of elastomer coatings.
10
Floating Seals Freudenberg and NOK Group
Simrit Americas Simrit Europe Simrit China
Plymouth, Michigan, USA Weinheim, Germany Shanghai, China
Tel: + 1 (866) 274 674 8 Tel: +49 (0) 18 05 – 746748 Tel: +86 (21) 50 36 69 00
Fax: + 1 (734) 354 550 0 Fax: +49 (0) 18 03 – 746748 Fax: +86 (21) 50 36 63 07
www.simrit.com
Publication No. 3207 © 2008 Simrit
