In fluid power systems, power is transmitted and controlled through a fluid (liquid or gas) under pressure within an enclosed circuit. To avoid leakage or to seal different chambers of a component from each other sealing devices are used. O-rings are one type of sealing devices. To seal properly, an O-ring has to be used in an appropriate housing for the application.
BS ISO 3601-2:2008 specifies the housing (gland) dimensions for class A O-rings for general industrial applications conforming to BS ISO 3601-1, as well as housing dimensions for class B O-rings used on selected metric-dimensioned hardware. These O-rings are for use in general hydraulic and pneumatic applications without and with anti-extrusion (back-up) rings. The dimensions, size codes and tolerances of the O-rings conform to BS ISO 3601-1.
BS ISO 3601-1:2008 incorporates O-ring sizes corresponding to those previously given in BS 1806 in the size tables for general industrial applications. This part of the standard gives specifications for the housing sizes for these O-rings.
BS ISO 3601-2:2008 contains:
- Normative references
- Terms and definitions
- Symbols
- O-ring housings: typical O-ring applications; surface roughness; housing dimensions; corners and edges of undefined shape; lead-in chamfer; calculation of housing dimensions for radial sealing applications
- Requirements: housing dimensions, determining O-ring size for custom housing dimensions; gland fill consideration in design of housings; temperature consideration in design of housings
- Identification statement
Housing dimensions for the O-rings intended for aerospace applications that are specified in BS ISO 3601-1 are also addressed.
Together with BS ISO 3601-1:2008, BS ISO 3601-2:2008 supersedes BS 1806:1989 which is withdrawn.