SAE ARP4727B : 2013

This SAE Aerospace Recommended Practice (ARP) presents two BASIC language computer programs to promote and standardize the computation of installed O-ring cross-section deflection hereafter referred to as "squeeze" and the computation of gland volume. The two programs were written with line numbers and without use of any system specific BASIC commands to allow usage with as many systems as possible with a minimum of editing. The programs support entry of customary U.S. or metric dimensions.The squeeze program, called SQ.BAS, has the following features:aallows selection of either piston or rod glandballows entry of cap strip seal thicknessccomputes minimum and maximum squeezedallows checking and correction of entries before executioneallows viewing of output on screen before printingfgives advisory messages for excessive stretch or inadequate squeezegallows on-line review of essential input and output variables prior to running programhcomputes clearance between minimum gland height and maximum backup radial height when the backup dimension is enterediprogram output is viewable on screen or may be printed out using either of two methodsThe gland volume program called GV.BAS, has the following features:aallows selection of either piston or rod glandbcomputes gland volume, O-ring volume and backup ring volumeccomputes minimum and maximum percent occupancydallows viewing of output on screen before printingeallows on-line review of essential input and output variables prior to running programfallows entry of volume of a non-standard configuration or special seal such as a cap strip sealgprogram output is viewable on screen or may be printed out using either of two methods

Cross Reference: AS4716,AS568,MIL-G-5514