X-Ring

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VALQUA No.
641(NBR)
Product name
Synthetic Rubber X-ring
Shape
X-RING
X-RING
Features1
Seal for rotating/reciprocating motion
Features2
For low resistance, rolling resistance and low pressure
Features3
With a grease pocket
Inventory status
Manufacturable product

Standard size
　
Type
Squeeze

Application classification
For rods
Pressure classification
None
Standard material
Usage location Material name Material No.
Main part NBR B0080

Non-standard quality of material (adaptable material)

Sealing direction
Flat surface Cylinder Cylindrical piston Cylindrical rod
△ ○
Size
Standard: φ7 to 100
Actual: over φ1000

■ Product content and main applications

Product content
Synthetic rubber material is molded into a ring shape with an X-shaped cross section.
Main applications
It is mainly used as a sealant for a rotating motion.

■ Service temperature range

Rubber material Service temperature range
NBR -20℃ ～ 80℃
Click here for the list of rubber materials

■ Operating pressure, pressure direction and pressure types

Pressure Pressure (with back-up ring) Pressure direction
3.9MPa Spiral: 34.3MPa Bi-directional
One-cut, endless: 49MPa

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 ×
General dust
Oil film
Speed
3m/sec or less
PV Value

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

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


■ Cross-section dimensions and design precautions

・Cross-section dimensions

2Ｗ


・Design precautions

The standard product is designed not to hold the rod by stretching toward the outside diameter, and the same level of stretch as an O-ring is acceptable for specialized products.

■ Case examples of defects and countermeasures

■ FAQ

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

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