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Type BU / rectangular, uncut (Custom) - BUYR000004POM71
Back-up Ring Type BU is a rectangular, uncut support ring used to prevent seal extrusion in high-pressure applications. Designed for static and dynamic systems, it is installed behind O-Rings or other primary seals. Made from durable materials like PTFE or elastomers, the BU ring enhances sealing performance, extends service life, and ensures reliable operation in hydraulic and pneumatic environments. This is a Custom Article Number with a Customer Specific Design.
BU Rectangular solid ID:
Ring Diameter Outside74 mm
Ring Diameter Inside70 mm
Signature StandardBUYR000004POM71
Type of Article1
Article Code with 6 char4
Root Ring Inside Diameter70 mm
Compound codePOM71
Root Ring Outside Diameter74 mm
Ring Thickness3 mm
Article GroupBU
Location MarkYR
Root Ring Thickness3 mm
Material Information for the product(s) on this page
POM71
Shore D Hardness:
85+/- 3
Gravity Tolerance:
+/-0.02
Minimum Hardness:
85
Gravity Unit:
g/cm³
Material:
POM71
Specific Gravity:
1.41
Material Type:
POM
Minimum Temperature:
-45
Maximum Hardness:
85
Ball Hardness:
160
Maximum Temperature:
100
Color:
White
Hardness Tolerance:
+/- 3
Material Code Class:
Thermoplastic
Hardness unit:
Shore D