Type 414-6305 PILOT BALL SPRING AND SEAT
PILOT BALL
PILOT EXHAUST ORIFICE
BALL ADJUSTER (FACTORY SET)
FROM CONTROL LINE
PILOT RESTRICTION SPACER AND DIAPHRAGMS W2897-1*
VENT
SET PRESSURE ADJUSTING SCREW ANTIROTATOR
TO TO TYPE EXHAUST 414 RELIEF VALVE
PILOT BALL SPRING AND SEAT
TYPE 6305B MOUNTING
PILOT BALL
PILOT EXHAUST BALL SEAT RING BALL ADJUSTER (FACTORY SET) TYPE 6305
CONTROL LINE (FILTER NOT SHOWN)
PILOT RESTRICTION
SET PRESSURE ADJUSTING SCREW
SPACER AND DIAPHRAGMS
ANTIROTATOR PILOT CONTROL SPRING ONLY ONE EXHAUST LINE REQUIRED FROM BOTH PISTON AND PILOT
PISTON BACKUP RINGS
INLET (CONTROLLED) PRESSURE LOADING PRESSURE OUTLET (EXHAUST) PRESSURE
PLUG WIPER RING DISC
W2547-1*
Figure 5. Type 414-6305 Relief Valve in Closed Position The Type 6305B pilot differs from the Type 6305 pilot in that it has an additional diaphragm to counterbalance back pressure forces tending to keep the pilot exhaust ball seat ring against the ball.
MAINTENANCE Relief valve parts are subject to normal wear and must be inspected and replaced as necessary. The frequency of inspection and parts replacement depends on the severity of service conditions.
WARNING To avoid personal injury or equipment damage from sudden release of pressure or explosion
of accumulated gas, do not attempt any maintenance or disassembly without first isolating the pilot and main valve from system pressure and relieving all internal pressure from the pilot and main valve.
Type 6305 and 6305B Pilots If the pilot leaks continuously or does not operate the main valve, the problem may be due to clogging or freezing in the pilot restriction, misadjustment of the ball adjuster, or insufficient seating of the ball. Perform the “Pilot Seating Adjustment” procedure for a misadjusted ball adjuster or ball. Perform the “Disassembly” and “Assembly” procedures that follow the “Pilot Seating Adjustment” section if any pilot parts need to be repaired or replaced. All key numbers refer to figures 6 and 7 unless otherwise indicated.
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