BP4900500-PT008

Rectangular cross-section. Consists of two spiral windings which are cut at the ends at an angle of 30° or 45°. Designed for static and dynamic use, but when used in a dynamic application they should be used for reciprocating movements only. Compensates for large temperature changes and tolerances due to screw-like elongation and contraction. Material: PTFE

Installation Dimensions:

Bore Diameter D_N H8 // Groove Diameter d₆ H959.8 mm

Groove Width b₂ +0.259.3 mm

Groove Width b₃ +0.2511.2 mm

Radius, r ±0.20.25 mm

Groove Diameter d₃ h9 // Rod Diameter d_N f750 mm

Material Properties:

Maximum Operating Temperature120 °C

Minimum Operating Temperature-45 °C

Hardness Nominal55

Hardness Tolerance+/- 5

Hardness UnitShore D

ColorWhite

Material TypePTFE

Tensile Strength20 MPa

Elongation at break250 %

Seal Capabilities:

Min. Temperature-200 °C

Max. Temperature260 °C

Pressure max., static use250 MPa

Pressure max., dynamic use, reciprocating25 MPa

Pressure max., dynamic use, oscillating or rotating15 MPa

External Sealing (Bore):

Back-up Ring dimensions for internal sealing ID x W x T50 x 4.9 x 0.85 mm

Instruction (PDF) 1

Material Information for the product(s) on this page

PT008

Material data sheet

Colour:

White

Basic Material:

PTFE

Hardness:

55 (Shore D)

Commercial Description:

Unfilled PTFE. This material is standard for back-up rings. Unfilled PTFE helps prevent extrusion in low- to medium-duty applications where an O-ring used by itself would not be suitable.