Fisher D Series, Инструкция по эксплуатации, Страница: 7 / 12

Designs D & DA
7
Assembly
1. Thoroughly clean the seat ring and bonnet threads
in the valve body (key 1). Also clean the valve body
seat ring gasket surfaces.
2. Apply Never-Seez Nickel Special lubricant or equiv-
alent to the threads of the seat ring (key 2), bonnet
(key 5), and their mating threads in the body.
3. Put the seat ring gasket (key 3) into the body.
4. Screw the seat ring into the body. Use a socket
wrench to tighten the seat ring to the torque values
shown in table 4. Remove all excess lubricant after
tightening.
5. Clean the bonnet gasket seating surfaces, and
install a new bonnet gasket (key 7).
6. If you had not removed the valve plug/stem assem-
bly and packing from the bonnet, then install the bon-
net (key 5) and valve plug/stem assembly (key 4) as a
unit, into the valve body. Keeping the valve plug/stem
assembly in an ‘‘up’’ position, thread the bonnet tightly
into the valve body, per torque values in table 4.
7. If you had previously chosen to remove the valve
plug/stem assembly and packing from the bonnet,
then remove any protective tape or covering from the
valve plug/stem assembly (key 4) and carefully install
it into the valve body. Slide the bonnet (key 5) over the
stem and thread it tightly into the valve body. Install
new packing and the metal packing box parts accord-
ing to the correct arrangement in figure 3. Place a
smooth-edged pipe over the valve stem, and gently
tap each soft packing part into the packing box.
8. Slide the packing follower, upper wiper, and pack-
ing flange (keys 10, 21, and 12) into position. Lubri-
cate the packing flange studs (key 13) and the washer
surfaces of the packing flange nuts (key 15). Install the
packing flange nuts.
9. For spring-loaded PTFE V-ring packing, tighten the
packing flange nuts (key 15) until the packing follower
(key 10) contacts the bonnet. For other packing ar-
rangements, tighten the packing flange nuts (key 15)
alternately in small equal increments. Continue until
one of the nuts reaches the minimum recommended
torque shown in table 3. Then tighten the remaining
packing flange nut until the packing flange is level and
at a 90-degree angle to the valve stem.
10. Mount the actuator on the bonnet (key 5) and con-
nect the actuator and valve plug stem according to the
procedure in the appropriate actuator instruction
manual. Check for leakage around the packing follow-
er (key 10) when you put the control valve assembly
into service. Retighten the packing flange nuts as re-
quired.
Parts Ordering
Each body-bonnet assembly is assigned a serial num-
ber, which is on the body or nameplate. The serial
number also appears on the actuator nameplate if you
bought a valve and actuator assembly. Refer to this
serial number when contacting your Fisher Controls
sales office or sales representative for technical ad-
vice. When ordering replacement parts, mention the
serial number. Also specify key number, part descrip-
tion, material, and part number from the following lists
of
Parts Kits and part numbers.
Parts Kits
Key Description Part Number
– – – Packing Box Parts for Double PTFE V-Ring
Packing (Includes keys 3, 7, 8, 11, 18, 19, and 21)
3/8-Inch (9.5 mm) Stem RDX0000CN12
1/2-Inch (12.7 mm) Stem RDX0000CN22
– – – Trim Package (31600)
[Includes Equal Percentage S31600 (316 SST) W/R30006 (alloy
6) tip valve plug/stem (key 4), S316000 w/alloy 6 seat ring (key 2),
stainless steel gaskets (keys 3 & 7), and single PTFE packing
parts (keys 8, 9, 11, 17, 18, and 21) or double PTFE packing parts
(keys 8, 11, 18, 19, and 21)]
Double PTFE V-Ring Packing
1 In. Valve w/3/8-Inch (9.5 mm) Stem Dia.
1/4-Inch (6.4 mm) port dia. RDXCNTRM112
3/8-Inch (9.5 mm) port dia. RDXCNTRM122
1/2-Inch (12.7 mm) port dia. RDXCNTRM132
3/4-Inch (19.1 mm) port dia. RDXCNTRM142
2 In. Valve w/1/2-Inch (12.7 mm) Stem Dia.
1/4-Inch (6.4 mm) port dia. RDXCNTRM212
3/8-Inch (9.5 mm) port dia. RDXCNTRM222
1/2-Inch (12.7 mm) port dia. RDXCNTRM232
3/4-Inch (19.1 mm) port dia. RDXCNTRM242
1-Inch (25.4 mm) port dia. RDXCNTRM252
1-1/4-Inch (31.8 mm) port dia. RDXCNTRM262
– – – Trim Package (Ceramic)
Includes seat ring and valve plug/stem assembly (keys 2 and 4)
1-In. Valve w/3/8-Inch (9.5 mm) Stem Dia.
1/4-Inch (6.4 mm) port dia. RDXVTC00012
3/8-Inch (9.5 mm) port dia. RDXVTC00022
1/2-Inch (12.7 mm) port dia. RDXVTC00032
3/4-Inch (19.1 mm) port dia. RDXVTC00042
2-In. Valve w/1/2-Inch (12.7 mm) Stem Dia.
1/4-Inch (6.4 mm) port dia. RDXVTC00052
3/8-Inch (9.5 mm) port dia. RDXVTC00062
1/2-Inch (12.7 mm) port dia. RDXVTC00072
3/4-Inch (19.1 mm) port dia. RDXVTC00082
1-Inch (25.4 mm) port dia. RDXVTC00092
1-1/4 Inch (31.8 mm) port dia. RDXVTC00102