Type BP (Spiral) - BP4901152-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.

Availability: In Stock

€ 61,29
Price (per piece)
3-9 € 20,43
10-24 € 10,21
25-49 € 6,80
50-99 € 4,81
100-249 € 3,40
250+ € 2,25

Installation Dimensions:

Bore Diameter DN H8   //   Groove Diameter d6 H9
125.0  mm
Groove Width, b2 +0.25
9.3  mm
Groove Width, b3 +0.25
11.2  mm
Radius, r ±0.2
0.25  mm
Groove Diameter d3 h9   //   Rod Diameter dN f7
115.2  mm

Internal Sealing (Rod) and External (Bore) sealing:

Back-up Ring dimensions OD x W x T
115.2 x 4.9 x 0.85  mm

Material Properties:

Maximum Operating Temperature
120.0  °C
Tensile Strength
20.0  MPa
Elongation at break
250.0  %
Minimum Operating Temperature
-45.0  °C
Hardness Nominal
Hardness Tolerance
+/- 5  
Hardness Unit
Shore D  

Seal Capabilities:

Min. Temperature
-200.0  °C
Max. Temperature
260.0  °C
Pressure max., static use
250.0  MPa
Pressure max., dynamic use, reciprocating
25.0  MPa
Pressure max., dynamic use, oscillating or rotating
15.0  MPa
installation drawing table

Material Information for the product(s) on this page BP4901152-PT008


Material Data Sheet (PDF) Only available for the registered users.
Basic Material
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.