Various Molded Gland Packing

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VALQUA No.
7740-LFR (BR：NBR)
Product name
Slipper seal
Shape
LFR
LFR
Features1
Rotating seal
Features2
Low resistance
Features3
Stick-slip is hard to occur.
Inventory status
Manufacturable product

Standard size
JIS　B2406/P
Type
Squeeze

Application classification
For rods
Pressure classification
Medium pressure
Standard material
Usage location Material name Material No.
BR NBR B2560
Sliding ring 3U8

Non-standard quality of material (adaptable material)

Sealing direction
Flat surface Cylinder Cylindrical piston Cylindrical rod
- - × ○
Size
Standard: φ22.4 to 120

■ 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 -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
14.0MPa 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
Currently testing strokes

■ Fluid, speed and PV value

Liquid ○
Gas ○
Fine particle -
General dust -
Oil film -
Speed
0.01 to 1m/s (3m/s for short period of time)
PV Value
7.0

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

Lubrication
Needed※1
Mountability
Excellent
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

Acceptable as long as it is designed based on the design criteria

■ Case examples of defects and countermeasures

■ FAQ

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

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