Fisher D4 User Manual

Instruction Manual
D103042X012
D4 Valve
July 2015
18
Figure 6. Fisher D4 Belleville Spring Procedure
BELLEVILLE SPRINGS REASONABLY TIGHT
TO SEAT THE PACKING
BELLEVILLE SPRINGS FINGER TIGHT, THEN TIGHTEN
1/2 TURN (3 FLATS ON THE RETAINER)
BONNET DESIGN FOR VALVES (2006 AND NEWER) WITH SERIAL NUMBERS LESS THAN 18679262
BONNET DESIGN FOR VALVES (BEFORE 2006) WITH SERIAL NUMBERS LESS THAN 18679262
BELLEVILLE SPRINGS REASONABLY TIGHT
TO SEAT THE PACKING
BELLEVILLE SPRINGS FINGER TIGHT, THEN TIGHTEN
1/2 TURN (3 FLATS ON THE RETAINER)
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.
PACKING RETAINER
LOCK RING
(KEY 22)
PACKING RETAINER
LOCK RING
(KEY 22)

Fisher D4 Specifications

General

Enclosure Rating	NEMA 4X, IP66
Input Signal	4-20 mA
Temperature Limits	-40 to 85°C (-40 to 185°F)
Input Voltage	18-30 VDC
Communication Protocol	HART