Fisher 24000C Instruction Manual
Instruction Manual
D103356X012
Baumann™ 24000C Carbon Steel
™
Little Scotty
Control Valve
24000C Valve
February 2021
Contents
Introduction 1...................................
Scope of Manual 1.............................
Safety Precautions 2...........................
Maintenance 3.................................
Installation 3..................................
Air Piping 4...................................
Disassembly 4................................
Lapping the Metal Seat 6.......................
Replacing Packing 6...........................
Actuator and Valve Body Reassembly 7...........
Parts Ordering 8................................
Dimensions and Weights 14......................
Figure 1. 24000C Control Valve with Baumann 32
Actuator and Fisher
W9744
™
3661 I/P Positioner
Introduction
Baumann 24000C carbon steel Little Scotty industrial control valves (figure 1) are intended for general utility service in
pressure, flow, and temperature control applications.
Scope of Manual
This instruction manual includes installation, maintenance, and parts information for the Baumann 24000C control
valve.
Do not install, operate, or maintain Baumann 24000C control valves without being fully trained and
qualified in valve, actuator, and accessory installation, operation, and maintenance. To avoid personal
injury or property damage, it is important to carefully read, understand, and follow all the contents of
this manual, including all safety cautions and warnings. If you have any questions about these
instructions, contact your Emerson sales office
www.Fisher.com
before proceeding.
24000C Valve
February 2021
Instruction Manual
D103356X012
WARNING
Always wear protective gloves, clothing and eyewear when performing any installation operations to avoid personal injury.
Personal injury or property damage caused by sudden release of pressure or bursting of pressure retaining parts may result
if service conditions exceed those for which the product was intended. To avoid injury or damage, provide a relief valve for
over pressure protection as required by government or accepted industry codes and good engineering practices.
Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section in this
instruction manual.
CAUTION
This valve is intended for a specific range of pressures, temperatures and other application specifications. Applying
different pressures and temperatures to the valve could result in parts damage, malfunction of the control valve or loss of
control of the process. Do not expose this product to service conditions or variables other than those for which the product
was intended. If you are not sure what these conditions are you should contact your Emerson sales office
complete specifications. Provide the product serial numbers (shown on the nameplate) and all other pertinent information.
for more
WARNING
If you move or work on an actuator installed on a valve with loading pressure applied, keep your hands and tools away from
the stem travel path to avoid personal injury. Be especially careful when removing the stem connector to release all loading
on the actuator stem whether it be from air pressure on the diaphragm or compression in the actuator springs.
Likewise take similar care when adjusting or removing any optional travel stop. Refer to the relevant actuator Maintenance
Instructions.
If hoisting the valve, take care to prevent people from being injured in case the hoist or rigging slips. Be sure to use
adequate sized hoists and chains or slings to handle the valve.
Personal injury could result from packing leakage. Valve packing is tightened before shipment; however, the packing might
require some readjustment to meet specific service conditions.
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Instruction Manual
D103356X012
24000C Valve
February 2021
Maintenance
WARNING
Avoid personal injury and property damage from sudden release of process pressure or bursting of parts. Before performing
any maintenance operations:
D Do not remove the actuator from the valve while the valve is still pressurized.
D Always wear protective gloves, clothing, and eyewear when performing any maintenance operations.
D Disconnect any operating lines providing air pressure, electric power, or a control signal to the actuator. Be sure the
actuator cannot suddenly open or close the valve.
D Use bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process pressure
on both sides of the valve. Drain the process media from both sides of the valve.
D Depending on the actuator construction, it will be necessary to manage the pneumatic actuator spring
pre-compression. It is essential to refer to the relevant actuator instructions in this manual to perform safe removal of
the actuator from the valve.
D Use lock‐out procedures to be sure the above measures stay in effect while you work on the equipment.
D The valve packing box may contain process fluids that are pressurized, even when the valve has been removed from the
pipeline. Process fluids may spray out under pressure when removing the packing hardware or packing rings, or when
loosening the packing box pipe plug.
D Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
Note
Whenever a gasket seal is disturbed by removing or shifting gasketed parts, install a new gasket during reassembly. This provides a
good gasket seal because the used gasket may not seal properly.
WARNING
Avoid personal injury or property damage by thoroughly cleaning the line of all dirt, welding chips, scale, oil or grease, and
other foreign material. Failure to do so could result in damage to the seating and sealing surfaces of the valve and result in
damage to the valve and release of process materials.
Installation
Refer to key numbers in figure 3 unless otherwise specified.
1. Before installing the valve in the pipeline, thoroughly clean the line of all dirt, welding chips, scale, oil or grease, and
other foreign material.
2. Install the valve so the controlled fluid will flow through the valve body in the direction indicated by the arrow cast
on the valve body.
3. A three-valve bypass would permit removal of the control valve from the line without shutting down the system.
4. In case of a heat-insulated installation, insulate the valve body only, not the bonnet.
WARNING
To avoid personal injury or property damage, do not attempt to do any work on a valve while the system is in operation. The
valve must be isolated 100% from the active system and the isolated line voided of pressure and/or hazardous fluids.
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24000C Valve
February 2021
Instruction Manual
D103356X012
Air Piping
1. For an air-to-extend actuator (air-to-close action), connect the actuating air pressure line to the 1/4 NPT opening in
the upper diaphragm case. For an air-to-retract actuator (air-to-open action) connect the actuating air pressure line
to the 1/4 NPT opening in the lower diaphragm case.
2. Use 6.4 mm (1/4 inch) O.D. tubing or equivalent for all air lines. If air line exceeds 8 m (25 ft) in length, 9.5 mm (3/8
inch) tubing is preferred. Air pressure should not exceed 2.5 barg (35 psig).
CAUTION
D When assembling or disassembling the valve, do not turn the valve stem while the plug is touching the valve seat. This
will damage the valve's seating surfaces.
D When adjusting the valve stem do not grip the stem directly with pliers or a wrench. This will damage the surface of the
stem, and cause damage to the packing in the valve. Instead, counter-tighten the two locknuts (key 27) on the stem
(key 5). This will allow you to turn the stem by turning the locknuts (key 27) with a wrench.
D When placing valve in a vise, clamp the flat end faces of the valve. Do not clamp the rounded sides of the valve. This will
distort the shape of the casting, and will ruin the valve.
Disassembly
1. Mount the valve in a vise by clamping flat end faces of the valve (figure 3). Caution must be taken not to damage
the serrated flange faces.
2. Remove the actuator, stem locknuts (key 27), travel indicator (key 58)) and yoke drive nut (key 9).
3. Turn the bonnet (key 8) in a counter-clockwise direction from the valve body (key 1). Remove the O-ring (key 12)
and remove and discard the valve body gasket (key 49). A new gasket should be installed each time the valve is
disassembled.
4. Pull the plug and stem assembly (keys 4 and 5) out through the bottom of the bonnet. Rotate the assembly to
prevent damage to the packing. Wipe the parts with a clean soft cloth and examine for signs of wear.
CAUTION
Handle the parts carefully to avoid damaging the seating and guiding surfaces.
5. Use a seat ring tool made according to the dimensions in figure 2 and table 1 to remove the seat ring (key 2) as
follows:
a. Insert the tool into the valve body. Be certain the tool lugs are engaged in the corresponding recesses in the seat
ring.
b. Use a 1/2 inch drive breaker bar or impact wrench having sufficient torque capability to remove the seat ring.
Seat ring installation torque is provided in table 2 for reference. Connect the breaker bar or impact wrench, and if
needed, a impact-rated extension bar, to the square drive of the seat ring tool.
c. Remove the seat ring (key 2) from the valve body. Make sure the seat ring tool is held at a right angle to the seat
ring during removal to prevent the tool from disengaging from the lugs of the seat ring.
d. Inspect parts for wear or damage that would prevent proper operation of the valve body.
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Instruction Manual
D103356X012
Figure 2. Seat Ring Tool Dimensions
C
.502−.508
SQUARE DRIVE
24000C Valve
February 2021
1
.502−.508
SQUARE DRIVE
1
A
E
NPS 1/2, 3/4, 1
1
MAX ALLOWABLE CENTER DRILL 0.532
D
B
F
A
B
D
CC
NPS 1 1/2
A
NPS 2
Table 1. Seat Ring Tool Dimensions (see figure 2)
Part Number DN NPS
GE96219X012
GE96219X022 25 1 1.52 2.3 0.40 0.25 0.35 0.20
GE96219X032 40 1-1/2 2.06 0.9 0.55 0.30 - - - - - -
GE96219X042 50 2 2.74 1.0 0.55 0.44 - - - - - -
15
20
1/2
3/4
A B C D E F
Inch
1.32 2.0 0.38 0.26 0.29 0.19
B
D
C
5
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