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>>> Valve Terminology - FRONT PAGE
RA
RF (RAISED FACE)
RPM – Revolutions Per Minute
RTJ or R.T.J. ~ Ring Type Joint
RADIATOR VALVES
RADIOGRAPHIC INSPECTION
RATCHET DRIVE
REDUCED PORT (Reduced Bore)
REGULAR PORT VALVE
REGULATOR
RELIEF VALVE
REMOTE CONTROL
RESILIENT SEAT
RIM PUL
RISING STEM
ROAD BOX
ROCKWELL HARDNESS NO.
RUPTURE DISC (BLOW-OUT DISC)