Various Molded Gland Packing

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VALQUA No.
7740-BPL (BR：NBR)
Product name
Slipper seal
Shape
BPL
BPL
Features1
Seal for rotating/reciprocating motion
Features2
Stick-slip is hard to occur.
Features3
Low resistance, no need for mold
Inventory status
Manufacturable product

Standard size
O-ring: JIS B 2401P Series
Type
Squeeze

Application classification
For pistons
Pressure classification
Oil hydraulic (Medium pressure)
Standard material
Usage location Material name Material No.
BR NBR B1270
Sliding ring 3U8

Non-standard quality of material (adaptable material)

Sealing direction
Flat surface Cylinder Cylindrical piston Cylindrical rod
- - ○ ×
Size
Applicable to JIS-P series (However, it must be from φ2.4)

■ 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
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
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

3Ｗ


（φ2.4）

・Design precautions

Due to its partial contact, caution is needed for an instability associated with the O-ring rolling movement.
Oil groove machining must be done for rotation.

■ Case examples of defects and countermeasures

■ FAQ

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

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