SealsPackingO-ling
  --------------------------------------- Specification & Natural Table
 

Oil seal, Dust seal, O-ring, U-Packing, U-cap, Piston cap
 
Description:

Polyurethane oil seals can withstand excessive toughness, abrasion and extrusion under rough service condition, over a prolonged period of time, without tearing or decaying.
New polyurethane material curing by HQEE give an extremely high performance with low compression set and high rebound at high temperature. This new high performance characteristics and quality material enable to use for arduous and high pressure designs.
Large seals in diameters of 480mm (18.75 inch.) to 1500mm (60 inch.) are available by casting, even in very small quantities.

Small to medium seals under 480mm (18.75 in.) are available by injection, only in large quantities, unless the specifications you request are in stock.
All major colors are available, i.e.- yellow, green, blue, brown, red, natural white and transparent clear.
A size list will be provided upon request. Specific designs and drawings are welcome.

Features:
Unusual Abrasion Resistance:

Johnson polyurethane oil seals provide more than 3 to 5 times the abrasion resistance obtain from even the best of conventional oil seals.

Highly Resistant to oil, greases, fuels and many other chemicals:
Refer to table (I). Johnson polyurethane oil seals are inherently oil resistant and will resist deterioration and swelling when in contact with oils, greases, waxes and most aliphatic hydrocarbons. Meanwhile suitable be washing by xylene.

Superior High Pressure Resistance:
Refer to table (IV) provide more than 3 to 5 times to conventional oil seals and no cracking.

High Resilient:
Longer service life with less downtime.

Temperature Resistance:
It does not crystallize or become brittle even in temperature as low as minus 20 degree C and also perform well at elevated temperature up to about 120 degree C.

Size:
We can make any oil seal molds upon your necessary by our accuracy bench. Besides we are going to prepare any size of JIS oil seals.

Special technique:
By specific auto machines (Casting, Injection and Extrusion, etc.) And raw material our products are superior and outstanding.


 
     
 
 
     
  I. OILRESISTANCE COMPARE TO CONVENTIONAL OIL SEALS  
     
 

Test Oil

Properties Change

Unit

PU

NBR

FKM

ASTM
No 1 Oil

Hardness

Shore A

-1

+2

0

Tensile Strength

-5

-3

-1

Elongation

+8

-22

-2

Volume

-0.2

-3.1

+0.1

ASTM
No 3 Oil

Hardness

Shore A

-1

-5

0

Tensile Strength

-8

-8

-9

Elongation

+6

-13

-2

Volume

+2.6

+10.2

+2.9

Test Condition

 

80℃×70 hrs

100℃×70 hrs

175℃×70 hrs

 
     
  II.  APPLICATION: ROD OIL SEAL AND PISTON OIL SEAL FOR CYLINDER HYDRAULIC  
     
 

     Section

Series

U-Packing

Dust Seal

Application

Small Section

Large Section

Large Section

Small Section

General use

UHS

UNS

DH

DR、DS

General
Emulsion

Outside use

UHR

UNR

Inside use

UHP

UNP

 
     
  III. THE COMPARATION OF THE LIMITEST PRESSURE  
     
 

Material

Section

Dynamic Case

Static Case

PU

Small Section UHS

Over 210kg / cm2

Over 315kg / cm2

Large Section UN

Over 350kg / cm2

Over 450kg / cm2

NBR

Small Section

100kg / cm2以下

120kg / cm2以下

FKM

Large Section

100kg / cm2以下

120kg / cm2以下

 
     
 

Specification & Natural Table

 
 
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