English
Type BA Back-up Rings have a concave cross section and are made from either NBR or FKM materials. The large contact surface protects the O-Ring against deformation in case of high pulsating pressures. Dimensional stability of the O-Ring improves the sealing force and increases the service life. Static use if preferable and reciprocating movement is possible.
BU Concave solid OD:
TSS Article Number (3 to 9)56T4398
Signature StandardBA56T4398-PTKC8
Type of Article0
Quality (10th Digit)-
Root Ring Inside Diameter428.6 mm
Compound codePTKC8
Ring Diameter Outside439.8 mm
Ring Diameter Inside428.6 mm
Root Ring Outside Diameter439.8 mm
Root Ring Width5.6 mm
Article GroupBA
Ring Thickness2.5 mm
Ring Width5.6 mm
Root Ring Thickness2.5 mm
Material Information for the product(s) on this page
PTKC8
Hardness unit:
Shore D
Minimum Temperature:
-200
Maximum Hardness:
67
Material Code Class:
Thermoplastic
Material:
PTKC8
Gravity Tolerance:
+/-0.02
Specific Gravity:
2.1
Hardness Tolerance:
+4/-3
Maximum Temperature:
260
Shore D Hardness:
67+4/-3
Material Type:
PTFE
Color:
Black
Minimum Hardness:
67
Gravity Unit:
g/cm³