Emerson Fisher CCV-N Instruction Manual

Instruction Manual

D104191X012

Fisher™ CCV-N Control Valves

CCV-N Valve

September 2016

Contents

Introduction 1.................................

Scope of Manual 1.............................

Specifications 2...............................

Description 2.................................

Educational Services 2.........................

Installation 3..................................

Maintenance 4.................................

Packing Maintenance 4.........................

Replace Packing 5.............................

Trim Maintenance 7...........................

Disassembly 7.............................

Valve Plug Maintenance 8...................

Assembly 9...............................

Parts Ordering 10...............................

Parts Kits 10...................................

Parts List 11...................................

Figure 1. Fisher NPS 3 CCV-N Section View

Introduction

Scope of Manual

This instruction manual includes installation, maintenance and parts information for NPS 2, 3 and 4 Class 300 CCV-N
fuel gas control valves. These valves are used in gas turbines which meter the fuel gas to the combustion chamber of
the turbine and provide linear flow with the ability to choke very quickly at a low pressure drop.

Refer to separate manuals for instructions covering the actuator and accessories.

Do not install, operate, or maintain CCV-N 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
proceeding.

www.Fisher.com

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CCV-N Valve

September 2016

Table 1. Specifications

Instruction Manual

D104191X012

Valve Sizes

NPS J 2 J 3 J 4

End Connection Style

(1)

Shutoff Classification

Class IV shutoff per ANSI/ FCI 70-2

Flow Direction

Flow Down

CL 300 Raised Face (RF) Flanges per ASME B16.5

Flow Characteristic

Maximum Inlet Pressure and Temperature

(1)

Consistent with CL300 pressure-temperature ratings

Linear from 15% to 100% travel

Approximate Weights

to 316_C (600_F)

VALVE SIZE, NPS

Maximum Pressure Drop

Consistent with pressure-temperature ratings per
ASME B16.34

1. The pressure/temperature limits in this manual and any applicable standard or code limitation for valve should not be exceeded.

2 31 68

3 51 112

4 77 168

WEIGHT

Kg Pounds

Description

CCV-N valves are single port, angle-style, and balanced valves with metal seat, seat ring retainer guide, and
push-down-to-close valve plug action.

Educational Services

For information on available courses for Fisher CCV-N fuel gas control valves, as well as a variety of other products,
contact:

Emerson Process Management
Educational Services - Registration
Phone: [phone] or 1-800-338-8158
E-mail: [e-mail]
http://www.emersonprocess.com/education

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Instruction Manual

D104191X012

CCV-N Valve

September 2016

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 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.

CAUTION

When ordered, the valve configuration and construction materials were selected to meet particular pressure, temperature,
pressure drop, and controlled fluid conditions. Since some valve 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 the valve and associated equipment for any damage and any foreign material.

2. Make certain the valve body interior is clean, that pipelines are free of foreign material, and that the valve is

oriented so that pipeline flow is in the same direction as the arrow on the side of the valve.

3. The control valve assembly may be installed in any orientation, unless limited by seismic criteria. However, the

normal method is with the actuator installed vertically above the valve. Other positions may result in uneven valve
plug and seat ring retainer wear and improper operation. For more information, consult your Emerson Process

Management sales office.

4. Use a suitable gasket between valve and pipeline flanges.

5. If continuous operation is required during inspection or maintenance, install a three-valve bypass around the

control valve assembly.

6. Refer to the actuator mounting procedure in the appropriate actuator instruction manual.

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.

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CCV-N Valve

September 2016

Instruction Manual

D104191X012

Maintenance

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 property damage from sudden release of process pressure. 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 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

from both sides of the valve. Drain the process media from both sides of the valve.

D Release the actuator loading pressure and relieve any actuator spring pre compression.

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.

CAUTION

Follow instructions carefully to avoid damaging the product surfaces, which could result in damage to the product.

Note

Whenever a gasket seal is disturbed by removing or shifting parts, a new gasket should be installed upon reassembly. This is
necessary to ensure a good gasket seal, since the used gasket may not seal properly.

Packing Maintenance

If there is undesirable packing leakage, first try to limit the leakage and establish a stem seal by tightening the packing
flange nuts.

If the packing is relatively new and tight on the stem, and if tightening the packing flange nuts does not stop the
leakage, it is possible that the valve stem is worn or nicked so that a seal cannot be made. The surface finish of a new
valve stem is critical for a good packing seal. If the leakage comes from the outside diameter of the packing, it is
possible that the leakage is caused by nicks or scratches around the packing box wall. If performing any of the
following procedures, inspect the valve stem and packing box wall for nicks and scratches.

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Instruction Manual

D104191X012

CCV-N Valve

September 2016

Replace Packing

WARNING

Refer to the WARNING at the beginning of the Maintenance section in this instruction manual

1. Isolate the control valve from the line pressure, release pressure from both sides of the valve body, and drain the

process media from both sides of the valve. If using a power actuator, also shut off all pressure lines to the power
actuator, and releases all pressure from the actuator. Use lock-out procedures to be sure that the above measures
stay in effect while you work on the equipment. Observe the Warnings at the start of the Maintenance section.

2. Disconnect the operating lines from the actuator and any leak-off piping from the bonnet. Disconnect the stem

connector and remove the actuator from the valve.

3. Loosen the packing flange nuts (key 5, figure 3) so that the packing is not tight on the valve stem (key 7, figure 3).

Remove any travel indicator parts and stem locknuts from the valve stem threads.

WARNING

To avoid personal injury or property damage caused by uncontrolled movement of the bonnet, loosen the bonnet by
following the instructions in the next step. Do not remove a stuck bonnet by pulling on it with equipment that can stretch
or store energy in any other manner. The sudden release of stored energy can cause uncontrolled movement of the bonnet.

Figure 2. Double PTFE Arrangements

UPPER WIPER
(KEY 12)

PACKING
FOLLOWER (KEY 13)

FEMALE
ADAPTER

PACKING RING

MALE
ADAPTER

LANTERN RING
(KEY 8)

PACKING BOX
RING (KEY 11)

12.7 mm

(1/2 INCH)

NOTE:
PACKING SET (KEY 6) CONTAINS A FEMALE ADAPTER, V-RING PACKING RINGS, MALE ADAPTER, AND LOWER WIPER RINGS.

1

A6746

STEM

LOWER WIPER

1

1

1

1

4. Hex nuts (key 16, figures 4, 5, or 6) attach the bonnet (key 1, figure 3) to the body (key 1, figures 4, 5, or 6). Loosen

these nuts approximately 3 mm (1/8 inch). Then loosen the body-to-bonnet gasketed joint by either rocking the
bonnet or prying between the bonnet and valve. Work the prying tool around the bonnet until the bonnet loosens.
If no fluid leaks from the joint, remove the nuts or cap screws completely and carefully lift the bonnet off the valve.

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