Fisher D4 Instruction Manual page 18

D4 Valve
July 2015
Figure 6. Fisher D4 Belleville Spring Procedure
BELLEVILLE SPRINGS REASONABLY TIGHT
BONNET DESIGN FOR VALVES (BEFORE 2006) WITH SERIAL NUMBERS LESS THAN 18679262
BELLEVILLE SPRINGS REASONABLY TIGHT
BONNET DESIGN FOR VALVES (2006 AND NEWER) WITH SERIAL NUMBERS LESS THAN 18679262
NOTE: RECOMMENDED SPARE PARTS, INCLUDING PACKING KITS, ARE THE SAME FOR BOTH BONNET DESIGNS.
NOTE: FOR SERIAL NUMBERS GREATER THAN 18679262, SEE THE STANDARD SECTION OF THIS INSTRUCTION MANUAL.
18
TO SEAT THE PACKING
TO SEAT THE PACKING
PACKING RETAINER
LOCK RING
(KEY 22)
BELLEVILLE SPRINGS FINGER TIGHT, THEN TIGHTEN
1/2 TURN (3 FLATS ON THE RETAINER)
PACKING RETAINER
LOCK RING
(KEY 22)
BELLEVILLE SPRINGS FINGER TIGHT, THEN TIGHTEN
1/2 TURN (3 FLATS ON THE RETAINER)
Instruction Manual
D103042X012