U-Packing

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VALQUA No.
2060-MLR(EPDM)
Product name
Custom-Made Synthetic Rubber Molded Product U-Packing
Shape
U-PK asymmetrical edge lip(R)
U-PK asymmetrical edge lip(R)
Features1
For hydraulic use
Features2
Exclusive for rod seal application
Features3
Low resistance
Inventory status
Products that are made based on the orders received

Standard size
JOHS-110
Type
Lip

Application classification
For rods
Pressure classification
High pressure (MIL)
Standard material

none

Non-standard quality of material (adaptable material)
Usage location Material name Material No.
Main part EPDM H0185

Sealing direction
Flat surface Cylinder Cylindrical piston Cylindrical rod
- - - ○ Exclusive
Size
Rod: φ18～280
Actual: over φ1001

■ Product content and main applications

Product content
Polyurethane rubber material is molded into a ring shape with a U, J and L-shaped cross section.
Main applications
It is used as a seal for various types of hydraulic machinery from -20 to 100℃. Especially appropriate for hydraulic cylinder packing that needs high-pressure and abrasion-resistant properties.

■ Service temperature range

Rubber material Service temperature range
EPDM -20℃ ～ 100℃
Click here for the list of rubber materials

■ Operating pressure, pressure direction and pressure types

Pressure Pressure (with back-up ring) Pressure direction
21MPa Differs by material and cross-section 34.3 to 68.6MPa One-side pressure
-

Pressure types
shock, surge, pulse, vacuum		 They can all be accommodated

■ Motions and strokes applied

For fixing -
Reciprocating ○
Rotating ×～△
Helical △
Opening and shutting ×
Sliding ×
Oscillating -
Stroking
Stroking is not specified; however, a short stroke could cause a lack of lubrication.

■ Fluid, speed and PV value

Liquid ○
Gas △
Fine particle ○ (Make adjustments)
General dust -
Oil film -
Speed
0.04～1.0m/sec
PV Value
-

■ Lubrication, mountability, sliding resistance, compression resistance, eccentricity/inclination, conformance

Lubrication
Needed
Mountability
Fair
Sliding resistance
and compression resistance
Low
Eccentricity/inclination
and conformance
High


■ Cross-section dimensions and design precautions

・Cross-section dimensions


・Design precautions

Acceptable as long as it is designed based on design criteria

■ Case examples of defects and countermeasures

■ FAQ

‣FAQ about high performance elastomer is here
 ‣FAQ about the elastomer is here

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