Various Molded Gland Packing

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VALQUA No.
7645
Product name
VALFLON Back-up Ring
Shape
Back-up Ring
Back-up Ring
Features1
Used for preventing seals from protruding.
Inventory status
Manufacturable product

Standard size
・JIS2401-4 (O-ring)
Type
-

Application classification
Common use
Pressure classification
Medium to high pressure
Standard material
Usage location Material name Material No.
Main part VALFLON 2N0

Non-standard quality of material (adaptable material)
Usage location Material name Material No.
Main part VALFLON 3U8
- Engineering plastics PA66
- Metal -

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

■ Product content and main applications

Product content
VALFLON is machined into a spiral-shaped, one-cut-shaped or endless-shaped ring.
Main applications
Used as back-up ring for preventing O-ring and U-packing from extrusion.

■ Service temperature range

Rubber material Service temperature range
VALFLON -30℃ ～ 150℃
Click here for the list of rubber materials

■ Operating pressure, pressure direction and pressure types

Pressure Pressure (with back-up ring) Pressure direction
44.1MPa - -
-

Pressure types
shock, surge, pulse, vacuum		 -

■ Motions and strokes applied

For fixing -
Reciprocating ○
Rotating ○
Helical ○
Opening and shutting ○
Sliding ○
Oscillating ○
Stroking
-

■ Fluid, speed and PV value

Liquid ○
Gas ○
Fine particle ○
General dust -
Oil film -
Speed
-
PV Value
-

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

Lubrication
Not needed
Mountability
One-cut: Good Endless: Fair
Sliding resistance
and compression resistance
Low
Eccentricity/inclination
and conformance
Low


■ Cross-section dimensions and design precautions

・Cross-section dimensions


・Design precautions

■ Case examples of defects and countermeasures

■ FAQ

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

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