Various Molded Gland Packing

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VALQUA No.
7740-CPL (BR：HNBR)
Product name
Custom-Made Slipper Seal
Shape
CPL
CPL
Features1
Seal for reciprocating motion, low resistance
Features2
Stick-slip is hard to occur.
Features3
Better reliability, prevents extrusion
Inventory status
Products that are made based on the orders received

Standard size
Partial ISO 7425-1
Type
Squeeze

Application classification
For pistons (construction machinery)
Pressure classification
Oil hydraulic (Extremely high pressure)
Standard material

none

Non-standard quality of material (adaptable material)
Usage location Material name Material No.
BR HNBR B5290
Sliding ring 3U8, HPPE

Sealing direction
Flat surface Cylinder Cylindrical piston Cylindrical rod
- - ○ ×
Size
Standard: φ80 to 215

■ Product content and main applications

Product content
VALFLON seal ring combined with various synthetic rubber back rings. Coefficient of friction is extremely low because of fluororesin used as a slider.
Main applications
It is used as a compact seal with excellent sealing performance for pistons under a wide range of pressures and temperatures.

■ Service temperature range

Rubber material Service temperature range
HNBR -25℃ ～ 120℃
Click here for the list of rubber materials

■ Operating pressure, pressure direction and pressure types

Pressure Pressure (with back-up ring) Pressure direction
50MPa Basically used Bi-directional
-

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 is acceptable.

■ Fluid, speed and PV value

Liquid ○
Gas △
Fine particle ×
General dust -
Oil film -
Speed
0.01～1m/s
PV Value
-

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

Lubrication
Needed ※1
Mountability
Fair
Sliding resistance
and compression resistance
Low
Eccentricity/inclination
and conformance
Average

*1 Usable even in poor lubrication condition (However, PTFE for non-lubrication must be used.)

■ Cross-section dimensions and design precautions

・Cross-section dimensions


・Design precautions

Acceptable as long as it is designed based on the design criteria
If the product has to be used for rotation, BUR is cut by 89°.

■ Case examples of defects and countermeasures

■ FAQ

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

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