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Type BU / rectangular, uncut (Custom) - BUYL000253PT004
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 Outside475 mm
Ring Diameter Inside463.30 mm
Signature StandardBUYL000253PT004
Type of Article1
Article Code with 6 char253
Root Ring Inside Diameter463.30 mm
Compound codePT004
Root Ring Outside Diameter475 mm
Ring Thickness2.60 mm
Article GroupBU
Location MarkYL
Root Ring Thickness2.60 mm
Material Information for the product(s) on this page
PT004
Shore D Hardness:
50+/- 5
Hardness Tolerance:
+/- 5
Hardness unit:
Shore D
Specific Gravity:
2.16
Material Code Class:
Thermoplastic
Minimum Temperature:
-200
Material:
PT004
Minimum Hardness:
50
Material Type:
PTFE
Maximum Temperature:
260
Gravity Tolerance:
+/-0.02
Color:
White
Gravity Unit:
g/cm³
Maximum Hardness:
50