From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Four graphs showing performance data for a conical seated valve under various pressure and operational conditions.
| Identifier | ExFiles\Box 105\3\ scan0287 | |
| Date | 16th September 1932 | |
| Top Left Graph: J III REAR. 90/90 LB. HIGH PRESSURE. N.S. 3497 CONICAL SEATED VALVE. VALVE ON SEAT. VALVE PISTON ON STOP. 4" STROKE. R.P.M. 250 180 135 90 45 22 308 LB/SQ" = 1.33 LB. B.P. 120" I.S. Top Right Graph: J III REAR 90/90 LB. LOW PRESSURE N.S. 3497 CONICAL SEATED VALVE VALVE ON SEAT. VALVE PISTON ON STOP 4" STROKE. R.P.M. 250 180 135 90 45 22 308 LB/SQ" = 1.33 LB. B.P. 120" I.S. Bottom Left Graph: J III REAR 90/90 LB. LOW PRESSURE. N.S. 3497 CONICAL SEATED VALVE. VALVE RAISED .010" OFF SEAT 4" STROKE. R.P.M. 250 180 135 90 45 22 308 LB/SQ" = 1.33 LB. B.P. 120" I.S. Bottom Right Graph: J III REAR 90/90 LB. HIGH PRESSURE. N.S. 3497 CONICAL SEATED VALVE. VALVE RAISED .010" OFF SEAT. 4" STROKE. R.P.M. 250 180 135 90 45 22 STAMP: ROLLS-ROYCE, LTD PRINT ROOM NOV 11 1932 DERBY. | ||