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).
Arrangement of a pressure and vacuum valve assembly (P.L.V.).
| Identifier | ExFiles\Box 156\2\ scan0204 | |
| Date | 21th September 1938 | |
| DRAWING NOT TO BE SCALED PLV/A/62B ALTERATIONS A METHOD OF SECURING OVERFLOW CAP MODIFIED See ALT No 3505 F.H. 6-10-38 B PATENT No ADDED F.H. 17/12/38 3652 PATENT No 22048/38 To Be Stamped Here 1 3/8" 3/4" 9/16 WHIT HEX 1.002"/1.010" A/F ADJUSTING SCREW 1" WHIT HEX. (1.67" A/F) Thin valve rises until the stem hits on the adjustable stop when the main valve opens 1/2 DIA 1 1/16" 3 3/16" 1/2" 1 9/16" 2 5/8 DIA. SCREWED 2 1/4 DIA x 16 T.P.I. R.H. 1" HEX. (1.67" A/F) NEOPRENE SEAT STANDARD SETTING - PRESSURE VALVES OPEN AT 5 LBS/SQ " VACUUM VALVES OPEN AT -3 LBS/SQ " SCALE - FULL SIZE. ARRANGEMENT OF P.L.V. OFF PER SET DR'N F.H. APP. CH'K A.A. DATE 21/9/38 TR{Capt. F. W. Turner - Finance}'D WORKING LENGTH FACE AREA MACHINED DIMENSIONS WITHOUT LIMITS TO BE WITHIN ± OF SIZE MATERIAL ⊕ MACHINED ALL OVER f MACHINED G GROUND SUPERSEDES SUPERSEDED BY PART No. PLV/A/62B THE BRITISH THERMOSTAT CO. LTD. TEDDINGTON WORKS, WINDMILL ROAD, SUNBURY, MIDDLESEX. | ||