This standard specifies the structural type, size series and tolerances of Y-shaped, combined type and E-shaped reciprocating rubber sealing rings for pneumatic valves. This standard is applicable to ordinary pneumatic directional valves, and other types of valves can be applied with reference.
JB/T 6375-1992 history
1992JB/T 6375-1992 Dimension series and tolerances of rubber sealing rings for pneumatic valves