Dust Seal

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VALQUA No.
2060-DHS
Product name
Dust Seal
Shape
DHS
DHS
Features1
With an oil lip
Features2
Oil hydraulic standard
Inventory status
Manufacturable product

Standard size
　
Type
Lip

Application classification
For rods
Pressure classification
Oil hydraulic
Standard material

none

Non-standard quality of material (adaptable material)
Usage location Material name Material No.
DHS NBR B0390

Sealing direction
Flat surface Cylinder Cylindrical piston Cylindrical rod
- - × ○
Size
Subject to catalog or design criteria
-

■ Product content and main applications

Product content
Nitrile rubber material is molded into a sealing lip shape with both a duster lip and oil lip.
Main applications
It is used as a seal for various types of hydraulic machinery from -20 to 80℃. Especially appropriate for hydraulic cylinder packing that needs high-pressure and abrasion-resistant properties.

■ Service temperature range

Rubber material Service temperature range
NBR -30℃ ～ 80℃
Click here for the list of rubber materials

■ Operating pressure, pressure direction and pressure types

Pressure Pressure (with back-up ring) Pressure direction
Zero pressure※1 - One side※2
-

Pressure types
shock, surge, pulse, vacuum		 -

※1 No fluid sealing mechanism

※2 There are a duster lip and an oil lip with oriented sealing.

■ Motions and strokes applied

For fixing -
Reciprocating ○
Rotating ×
Helical ×
Opening and shutting ×
Sliding ×
Oscillating -
Stroking
Stroking is not specified; however, a short stroke is acceptable.

■ Fluid, speed and PV value

Liquid ○
Gas ×
Fine particle ○
General dust ○
Oil film ○
Speed
0.04～1m/sec
PV Value
-

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

Lubrication
Not needed※3
Mountability
Fair
Sliding resistance
and compression resistance
Low
Eccentricity/inclination
and conformance
High

※3 However, it is preferable to have lubrication.

■ Cross-section dimensions and design precautions

・Cross-section dimensions

3.5Ｗ


・Design precautions

If the amount of oil film scraped out is significant, the duster lip shall have a round tip.
When there are more leaks from the rod seal, extrusion/damage will easily occur.

■ Case examples of defects and countermeasures

■ FAQ

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

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