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).
Blueprint showing cross-sections and specifications for a low pressure and high pressure valve.

Identifier  ExFiles\Box 28\1\  Scan218
Date  17th February 1931 guessed
  
SHEET 9.
UPWARD OR LOW PRESSURE VALVE.
ANNULAR CLEARANCE AT A .282 - .243 = .039'
SHROUDED VALVE LIFT .125'
.037'
VALVE LETTER C.
OUTER SPRING RATING 238 LBS/IN
INNER SPRING RATING 14.8 LBS/IN.
LIGHT SPRING 'SET UP' .088
VALVE LIFT BEFORE HEAVY
SPRING COMES INTO
OPERATION .037
ANNULAR LEAK THEN
ABOUT .085 LONG
HIGH PRESSURE OR REBOUND VALVE.
ANNULAR CLEARANCE AT B .282 - .275 = .007'
VALVE LETTER C
SPRING RATING 103.5 LBS/IN.
VALVE LIFT BEFORE
PORT EXPOSED .020 APPROX.
  
  


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