Instruction Manual
D103463X012
Fisher™ CHP Control Valve
CHP Valve
June 2017
Contents
Introduction 1.................................
Scope of Manual 1.............................
Description 1.................................
Specifications 1...............................
Installation 3..................................
Maintenance 4.................................
Packing Maintenance 6.........................
Adding Packing Rings 7.....................
Replacing Packing 7........................
Trim Removal 10..............................
Valve Plug Maintenance 10.....................
Lapping Seats 11..............................
Trim Replacement 12..........................
Parts Ordering 13...............................
Parts Kits 14...................................
Parts List 14...................................
Introduction
Figure 1. Fisher CHP NPS 12 Control Valve
Scope of Manual
This instruction manual includes installation, maintenance, and parts information for the Fisher CHP control valve.
Refer to separate manuals for instructions covering the actuator, positioner, and accessories.
Do not install, operate, or maintain CHP 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
proceeding.
or Local Business Partner before
Description
The CHP globe valve (figure 1) has a metal seat, cage guiding, quick change trim, and push‐down‐to‐close valve plug
action. The valve uses a balanced valve plug. To provide a seal between the cage and a balanced valve plug, the
balanced valve plug uses a PEEK (Poly Ether Ether Ketone) anti-extrusion ring with a pressure‐assisted spring‐loaded
seal ring.
Specifications
Specifications for the CHP valves are shown in table 1.
www.Fisher.com
CHP Valve
June 2017
Table 1. Specifications
Instruction Manual
D103463X012
Size/Pressure Class/Body Materials
NPS 12 / CL2500 / WCC, WC9
Maximum Inlet Pressure and Temperature
(1)
Consistent with ASME B16.34 except CHPT PEEK
anti‐extrusion seal ring construction. Maximum
temperature limit is 316_C (600_F). For temperature
exceeding 316_C (600_F), please consult Singapore
SD&S
End Connection Style
Buttweld Ends : All buttwelding end schedules per
ASME B16.25
Bonnet and Body‐to‐Bonnet Bolting
Plain Bonnet: 5 inch H Yoke Boss
Studs: Steel A 193‐B7
Nuts: Steel A 194‐2H
1. The pressure/temperature limits in this manual and any applicable standard or code limitation for valve should not be exceeded.
2. For Boiler feedwater application, proper use of a block valve during closing of the control valve is recommended to minimize control valve trim damage.
Flow Coefficient
Maximum Cv: 1040 Km: 0.65 Fl: 0.81
Modified Equal Percentage
Flow Direction
Flow down (in through the cage windows and out
through the seat ring) except for service with
pressure drop exceeding 69 bar (1000psi) when a
diverter cone plug is used
Stem Diameter
1‐1/4 inch with 2‐inch VSC (Valve Stem Connection)
Shutoff Classification per ANSI/FCI 70‐2 and IEC
60534-4
CHPT: Class IV (standard), Class V (optional)
CHPD: Class III
(2)
Weight
Estimated 2000 kg
Please consult Singapore SD&S for any queries
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Instruction Manual
D103463X012
CHP Valve
June 2017
Installation
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 may result if the valve assembly is installed
where service conditions could exceed the limits given in table 1 or on the appropriate nameplates. To avoid such 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.
WARNING
A bonnet flange has a tapped hole that was used to handle the bonnet during manufacture. Since this tapped hole was not
designed or intended to support the weight of the valve/bonnet assembly, do not use this tapped hole to lift the valve
assembly or personal injury may result from the assembly falling.
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 checking with your Emerson
sales office or Local Business Partner.
1. Before installing the valve, inspect it to ensure that the valve body cavity is free of foreign material.
2. Clean out all pipelines to remove scale, welding slag, and other foreign materials before installing the valve.
3. Flow through the valve must be in the direction indicated by the flow arrow, which is attached to the valve body.
4. Use accepted piping practices when installing the valve in the pipeline.
5. Install a three‐valve bypass around the valve if continuous operation is required during maintenance.
6. If the actuator and valve body are shipped separately, refer to the actuator mounting procedure in the appropriate
actuator instruction manual.
7. If the valve body was shipped without packing installed in the packing box, install the packing before putting the
valve body into service. Refer to instructions given in the Packing Maintenance procedure.
WARNING
Personal injury could result from packing leakage. Valve packing was tightened prior to shipment; however, the packing
might require some readjustment to meet specific service conditions. Check with your process or safety engineer for any
additional measures that must be taken to protect against process media.
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CHP Valve
June 2017
Instruction Manual
D103463X012
Maintenance
Refer to figure 4.
Valve parts are subject to normal wear and must be inspected and replaced as necessary. Inspection and maintenance
frequency depends on the severity of service conditions. This section includes instructions for packing maintenance
and trim maintenance. All maintenance operations may be performed with the valve in the line.
WARNING
Avoid personal injury or damage to property from sudden release of pressure or uncontrolled process fluid. Before starting
disassembly:
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 to avoid personal
injury.
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 Vent the power actuator loading pressure and relieve any actuator spring precompression.
D Use lock‐out procedures to be sure that 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.
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Instruction Manual
D103463X012
CHP Valve
June 2017
Figure 2. Packing Arrangements
UPPER WIPER (KEY 12)
PACKING FOLLOWER
(KEY 13)
FEMALE ADAPTOR
(KEY 32)
V‐RING (KEY 7)
MALE ADAPTOR
(KEY 31)
WASHER (KEY 10)
SPRING (KEY 8)
PACKING BOX RING
(KEY 11)
12A8160‐A
PTFE V‐RING
SINGLE PACKING
12A7839‐A
Sht 1
PTFE V‐RING
DOUBLE PACKING
NOTES:
1
0.102 mm (0.004 INCH) THICK SACRIFICIAL ZINC WASHERS.
USE ONLY ONE BELOW EACH GRAPHITE LAMINATE RING.
C0634‐1
LOWER WIPER
(KEY 30)
UPPER WIPER (KEY 12)
PACKING FOLLOWER
(KEY 13)
FEMALE ADAPTOR
(KEY 32)
V‐RING (KEY 7)
MALE ADAPTOR
(KEY 31)
LANTERN RING
(KEY 8)
PACKING BOX RING
(KEY 11)
LOWER WIPER
(KEY 30)
PACKING ARRANGEMENTS FOR 31.8 mm (1‐1/4 INCH) VALVE STEMS
PACKING FOLLOWER
(KEY 13)
GRAPHITE LAMINATE
KEY 6
1
14A3412‐B
PACKING RING (KEY 7)
2
GRAPHITE FILAMENT
PACKING RING (KEY 9)
3
LANTERN RING
(KEY 8)
PACKING BOX RING
(KEY 11)
GRAPHITE LAMINATE AND FILAMENT
SINGLE PACKING
PACKING FOLLOWER
(KEY 13)
GRAPHITE LAMINATE
KEY 6
1
1
14A3414‐B
PACKING RING (KEY 7)
2
GRAPHITE FILAMENT
PACKING RING (KEY 9)
3
LANTERN RING
(KEY 8)
PACKING BOX RING
(KEY 11)
GRAPHITE LAMINATE AND FILAMENT
DOUBLE PACKING
2
HAS THE APPEARANCE OF FLAT WASHERS PRESSED TOGETHER.
3
HAS THE APPEARANCE OF A WOVEN OR BRAIDED RING.
13A0112‐A
GRAPHITE/COMPOSITION
DOUBLE PACKING
12A8163‐A
PTFE/COMPOSITION
DOUBLE PACKING
UPPER WIPER (KEY 12)
PACKING FOLLOWER
(KEY 13)
PACKING RING
(KEY 7)
PACKING RING
(KEY 7)
LANTERN RING
(KEY 8)
PACKING BOX RING
(KEY 11)
UPPER WIPER (KEY 12)
PACKING FOLLOWER
(KEY 13)
PACKING RING
(KEY 7)
LANTERN RING
(KEY 8)
PACKING BOX RING
(KEY 11)
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