Fisher Manuals & Guides: Fisher 1261-R and 1261-E Self-Operated Control Valves Manuals & Guides
Instruction Manual
D103528X012
Fisherr 1261-R and 1261-E
Self-Operated Control Valves
1261-R and 1261-E Valves
November 2012
Contents
Introduction 1.................................
Scope of Manual 1.............................
Description 2.................................
Specifications 2...............................
Installation 4..................................
Maintenance 5.................................
Packing Maintenance 6........................
Replacing Packing 7...........................
Trim Maintenance 9...........................
Parts Ordering 10...............................
Parts List 11...................................
Figure 1. Fisher 1261-R Pressure-Reducing Valve
Introduction
Scope of Manual
This instruction manual provides installation, adjustment, maintenance, and parts information for the Fisher 1261-R
and 1261-E Self-Operated control valves. Refer to separate instruction manuals for more information about the valve.
ThevalvebodyassemblyofthesevalvesarethesameasthevalvebodyassemblyforFisher1100controlvalves.
Do not install, operate, or maintain 1261-R or 1261-E 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 Process Management sales office before
proceeding.
www.Fisher.com
1261-R and 1261-E Valves
November 2012
Table 1. Specifications
Instruction Manual
D103528X012
End Connection Styles
Flanged: CL150 RF and CL300 RF per ASME B16.5.
DIN PN 10, 16, 40, Per EN ISO 1092-1, Type B and F
Shutoff Classification per ANSI/FCI 70-2
and IEC 60534-4
ClassIVisstandard
ClassVIisoptional
Maximum Inlet Pressure and Temperature
Flanged: Compatibility with CL150, 300 per
ASME B16.34 EN ISO 1092-1,2,3,4
Flow Characteristic and Flow Direction
Trim Standard: Linear. Flow Up per valves with
unbalanced plug. Flow Down per valves with
balanced plug.
Trim for Low Noise (Multihole, Whisper): Linear and
Flow Up
Trim Anticavitation (Cavitrol™): Linear and Flow Down
Description
Fisher 1261-R and 1261-E are pressure globe style single-port valves with metal seats, cage guiding and
push-down-to-close valve plug action.
The 1261-R is used for pressure-reducing service. Increasing the pressure in the diaphragm casing moves the actuator
stem downward.
The 1261-E is used for pressure-relief service. Increasing the pressure in the diaphragm casing moves the actuator
stem upward.
The 1261.00-R and 1261.00-E valves use an unbalanced plug. The 1261.01-R and 1261.01-E use balanced valve plugs.
(See bulletin 1100 Control Valves for different types of cages and balanced plugs).
Specifications
Specifications for the 1261-R and 1261-E are shown in table 1. Refer to separate manuals for information concerning
the actuator.
Table 2. Codification for Fisher 1261 Valves
CODE 1 2 6 1 . X X
Digit 1 2 3 4 5 6
DIGIT N_ DESCRIPTION DIRECTION FLOW
0 Standard Trim Flow-Up
1 Low noise trims (Multihole) Flow-Up
2
4
5
6
5 Anticavitation Trim (Cavitrol III 1 Step) Flow-Down
6
7 Anticavitation Trim (Cavitrol III 2 Steps) Flow-Down
8
9 Low noiselevel trim( Whisper III A,B,C,D3) Flow-Up
0 Non balanced Plug Flow-Up
1 Balanced Plug (seal Keilpac). Flow-Down
2
3
4 Balanced Plug (seal MSE) Flow-Down
5
6
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Instruction Manual
D103528X012
1261-R and 1261-E Valves
November 2012
Table 3. Available Shutoff Classifications per ANSI/FCI 70-2 and IEC 60534-4
Valve Type Type Balanced Max. Temp
1261.00 None
1261.01 KEILPAC 200_C
1261.04 MSE 316_C
1. See temperature capabilities of actuator diaphragm material
2. Valves with antinoise trim (Multihole, Whisper Trim™, etc) flow direction will be Flow-Up.
3. Maximum temperature limited by Keilpac gasket material.
(1)
400_C
200_C Metal to PTFE Standard VI
316_C Metal to Ekonol Standard VI
(3)
Seat Type Enclosure Type Flow Direction
Metal to Metal Standard IV
Metal to Metal Optional V
Metal to Metal Standard IV
Metal to Metal Optional V
Metal to PTFE Standard VI
Metal to Metal Standard IV
Metal to Metal Optional V
Metal to Ekonol Standard VI
Flow-Up
Flow-Down
Table 4. Maximum Flow Coefficients (Cv) with Quick Opening per 1261.00-R and 1261.00-E valves
VALVE SIZE SEAT DIAMETER (mm)
NPS 4 6 10 15 20 30 40 50
1/2
3/4
1 11.6 20
1-1/2
2 46 51
3
4
Stroke (mm) 1.5 2 3 4.5 6 9 12 16
Notes: 1. Kv = 0.865 x Cv
0.7 1.5 3.5
3.5 8.1 11.6 27
6.9
8.1
9.2
39
11.6 27 46 64
(2)
Table 5. Maximum Flow Coefficients (Cv) with Quick Opening per 1261.01-R, 1261.04 R, 1261.01 E and
1261.04 E Valves
VALVE SIZE SEAT DIAMETER (mm)
NPS 50 65 80 95
2 51
3
4 139
Stroke (mm) 16 16 16 16
Notes: 1. Kv = 0.865 x Cv
64 94 117
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1261-R and 1261-E Valves
November 2012
Figure 2. Typical Installation Schematics
Instruction Manual
D103528X012
1/2 NPT
RACTUATOR
STRAINER STRAINER1261
PRESSURE-REDUCING VALVE
PRESSURE — REDUCING INSTALLATION
NEEDLE VALVE
BYPASS
LINE
NEEDLE VALVE
1/2 NPT
PRESSURE — RELIEF INSTALLATION
EACTUATOR
1261
PRESSURE-RELIEF VALVE
BYPASS
LINE
Installation
WARNING
Always wear protective gloves, clothing, and eyewear when performing any installation operations to avoid personal
injury.
Personal injury or equipment damage caused by sudden release of pressure may result if the valve assembly is installed
where service conditions could exceed the limits given in table 1 or the appropriate nameplate. To avoid such injury or
damage, provide a relief valve for overpressure 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
When ordered, the valve configuration and construction materials were selected to meet particular pressure, temperature,
pressure drop, and controlled fluid conditions. Since some body/trim material combinations are limited in their pressure
drop and temperature ranges, do not apply any other conditions to the valve without first contacting your Emerson Process
Management sales office.
1. Before installing the valve, inspect it to be certain that the valve body cavity is free of foreign material. Clean out all
pipelines to remove scale, welding slag, and other foreign materials.
2. The control valve assembly may be installed in any orientation unless limited by seismic criteria. If the regulator or
relief valve is to be used for steam service, the valve should be installed with the actuator positioned below the
pipeline, and the control line should be sloped down toward the diaphragm casing. This is to ensure that any forming
condensate will maintain a water seal to protect the diaphragm. For more information consult your Emerson Process
Management sales office. Flow through the valve must be in the direction indicated by the arrow cast on the valve.
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Instruction Manual
D103528X012
1261-R and 1261-E Valves
November 2012
3. Use accepted piping practices when installing the valve in the pipeline. Use a suitable gasket between the valve and
pipeline flanges.
4. It is recommended that a strainer be installed in the pipeline ahead of the regulator or relief valve to protect it while
in service. (see figure 2).
5. If continuous operation is required during inspection or maintenance, install a three-valve bypass around the valve
assembly.(see figure 2)
6. If the actuator and valve are shipped separately, refer to the appropriate actuator instruction manual for the
actuator mounting procedure.
WARNING
Personal injury could result from packing leakage. Valve packing was tightened before shipment; however the packing
might require some readjustment to meet specific service conditions.
Maintenance
WARNING
Avoid personal injury or 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 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 Isolate the regulator or relief valve from the system pressure, and relieve all internal pressure.
D Use bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process pressure
from both sides of the valve. Drain the process media from both sides of the valve.
D Vent the power actuator loading pressure and relieve any actuator spring precompression as described in the
disassembly actuator section..
D Use lock-out procedures to be sure that the above measures stay in effect while you work on the equipment.
D Always wear protective gloves, clothing, and eyewear when performing any maintenance operations to avoid personal
injury.
D The valve packing area 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.
D Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
Valve parts are subjects to normal wear and must be inspected and replaced as necessary. Inspection and maintenance
frequency depends on the severity of service conditions The maintenance operations may be performed with the valve
in the line.
Note
Whenever a gasket seal is disturbed by removing or shifting gasket parts, a new gasket should be installed upon reassembly. This is
necessary to ensure a good gasket seal.
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1261-R and 1261-E Valves
November 2012
Figure 3. Typical Packing Assemblies for 1261 Valves
Instruction Manual
D103528X012
TYPICAL PTFE PACKING, V-RING
TYPICAL ENVIRO-SEAL™ PTFE PACKING
TYPICAL BRAIDED PTFE PACKING TYPICAL GRAPHITE PACKING
TYPICAL ENVIRO-SEAL GRAPHITE PACKING
Maintenance information which follows for packing maintenance, replacing packing, trim maintenance, and repairing
are for the 1261 valve with plain bonnet. A 1261 valve with a plain bonnet is shown in figure 4.
Packing Maintenance
Key numbers refer to figure 3.
For spring-loaded single PTFE V-ring packing, the packing spring (key 112) maintains a sealing force on the packing. If
leakage is noted around the bushing of the packing flange (key 101), check to be sure the packing flange is touching
the bonnet (key 12 fig 4). If the packing flange is not touching the bonnet, tighten the packing flange nuts (key 103)
until the packing flange is against the bonnet. If leakage cannot be stopped in this manner, proceed to the Replacing
Packing procedure.
If there is undesirable packing leakage with other than spring-loaded packing, first try to limit the leakage and
establish a stem seal by tightening the packing flange nuts (key 103) to at least the minimum recommended torque in
table 6. However, do not exceed the maximum recommended torque in table 6, or excessive friction may result.
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