Rolls-Royce Archives
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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SUPERSEDED BY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.
  
  


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