Guide rings | Ptfe piston guide rings

 
Ptfe piston guide rings

A Neuflon-PTFE compound tape intended to be used as a guiding element in hydraulic and pneumatic applications
Long life of both the skate and the sliding surface. Low friction and no Stick-Slip. Possibility of dry running. Exceptional resistance to the 'Diesel effect'. Ample thermal and chemical resistance. Ready availability from coils.

Cross Section Code S
Thickness
F
groove diameter
L
groove width
G
piston-cylinder clearence
Z
gap clearence
length
    j8 - h8 H11 max S x 0,4   +0 / -0,3
HD SP   3/1,5 1,5 A - 2 x S 3,2 choice depends on
 the seal adopted
max S x 0,4
1 + A x 0,03 3,14x(A-S)-Z
HD SP   3/2,5 2,5 3,2
HD SP   4/1,5 1,5 4,2
HD SP   4/2,5  2,5 4,2
HD SP   6/1,5 1,5 6,3
HD SP   6/2,5 2,5 6,3
HD SP   8/1,5 1,5 8,1
HD SP   8/2,5 2,5 8,1
HD SP   9/2,5 2,5 9,7
HD SP 15/2,5 2,5 15
HD SP 20/2,5 2,5 20
HD SP 25/2,5 2,5 25
HD SP 30/2,5 2,5 30
ELASTOPLASTIC DEFORMATION / LOAD
FRICTION COEFFICIENT / SPEED
   
      MATERIAL
CHARACTERISTICS SPECIFICATION UNITS NEUFLON-071 NEUFLON-059
SPECIFIC LOAD Qs T <=100°C   N.mm-2 2.5 2.6
Compression modulus at 1% of deformation D695-54 N.mm-2 8 8.40
Hardness D53505 Shore D 60 65
Friction Coefficient     0.12 0.13
Max. Speed   m/sec 5 5
Thermal expansion coefficient D696-70 10^-6 / °C 90 85
Continual operational Temp.   °C 250 250
Peak Temperature   °C 300 300
Compatible with hydraulic oil     yes yes
Compatible with water/oil emulsions     yes yes
Compatible with DOT 3   DOT4     yes yes
Compatible with water     no yes
Compatible with phosphoric esters     yes yes
Flammability D635-68   fire resistant fire resistant