Various Molded Gland Packing

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VALQUA No.
7740-APS (BR：HNBR)
Product name
Custom-Made Slipper Seal
Shape
APS
APS
Features1
Seal for rotating/reciprocating motion
Features2
Low resistance
Features3
Stick-slip is hard to occur.
Inventory status
Products that are made based on the orders received

Standard size
　
Type
Squeeze

Application classification
For pistons
Pressure classification
Oil hydraulic (Medium 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: φ20 to 250

■ 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
20.6MPa Basically not 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

2.5Ｗ


・Design precautions

If using for rotation, add a groove to the sliding ring in order to reduce the oil pool and the contact area.

■ Case examples of defects and countermeasures

■ FAQ

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

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