INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS
FLANGED MULTI-PORT BALL VALVES
INTRODUCTION
This instruction manual includes installation, operation and maintenance information for flanged multi-port ball
valves. This manual addresses lever operated ball valves only. Please refer to other FNW manuals for other ball
valves, actuated valves, modifications, or accessories.
CAUTION
1. Valve pressure ratings are based on many variables, including valve series and size, as well as body, seat,
and bolt material. Verify that the application does not exceed the pressure or temperature rating of the
valves.
2. Always depressurize the line with the valve in the open position before disassembly.
3. Wear protective equipment and take appropriate precautions to safeguard against injury caused by the
discharge of trapped fluids.
4. Use only FNW recommended spare parts for maintenance.
5. To ensure safety and to maintain warranty, never modify the valve in any way without prior approval from
FNW.
STORAGE
ATTENTION: If the valves are not destined for immediate use, the following precautions should be taken:
1. If possible, leave the valves in their packaging cases during the period of storage.
2. Ball valves must remain in the open position while being stored.
3. In order to prevent damage, protective plastic covers on valve ends should not be removed until immediately
prior to installation.
4. It is advisable to store valves in waterproof conditions. Ball valves should be protected to safeguard against
humidity, moisture, dust, dirt, sand, mud, salt spray, sea water, or other forms of corrosive and erosive
environments.
5. Valves with actuators are to be stored in dry conditions.
6. Valves to be stored for long periods of time should be checked by the quality control personnel or designee
every six months; every three months when valves are automated. Maintenance during this storage period
can include:
o Internal surface should be inspected to check for dust or other foreign objects.
o Rust or dust must be removed by cleaning with proper solvent.
o After cleaning, ball valves must be lubricated with adequate lubricant.
o Ball valves should be operated for at least two complete cycles before installing or returning to storage.
INSTALLATION
WARNING: To avoid personal injury to your self, fellow workers, or damage to property from release of process
fluid, before installation:
a. Shut off all operating lines to the valve site.
b. Isolate the valve site completely from the process.
c. Release process pressure.
d. Drain the process fluid from the valve site.
1. Note:
o The ball valves may be installed in any position using standard pipe fitting practices.
o Pipe must be free of tension (supported) both during and after installation to avoid undue stress on the
valve.
o The ball valves are shipped in a full position to prevent damage of seat and ball surfaces. The valve
should be kept in a full position during installation.
DOC: IOM_FNW633-634_ ver_12-2007 Page 1 of 6
INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS
FLANGED MULTI-PORT BALL VALVES
o The ball valves are supplied with end caps for protecting the flange connections and the interior space of
the valves. Remove the protective covers only just prior to installation of the valve.
o There may be residual water from testing trapped between the ball and body. This can be removed by
partially stroking the valve, exposing the cavity to the through port of the ball.
o If the valve was supplied with an actuator, secondary support may be necessary. Contact FNW for
recommendations.
o FNW flanged ball valves are designed for mounting between ANSI flanges. It should be taken into
account that a valve which is designed for a particular flange standard cannot, under normal situations,
be used with flanges from another standard. If pipeline flanges are to be used that are not in accordance
with the specifications of the order, the manufacturer should be consulted. All standard flange seals can
be used.
o ATTENTION: Do not perform welding near an installed valve. Welding in the vicinity of an installed valve
can damage the valve and cause leakage.
o CAUTION: The rotating ball can cause injury. Keep body parts away from the space between ball and
body (valve interior).
2. Before installation:
o Inspect the valve body port and associated equipment for any damage that may have occurred and for
any foreign matter that may have collected in shipping or storage. Make certain the body interior is clean.
o Inspect the pipe line and mating flanges, making sure the pipe is free of foreign material that could
damage the ball or seat and the flanges are clean and have no burrs or pits that could cause leakage.
o Cycle the valve at least twice to ensure proper operation.
3. Installing:
o Prior to mounting the valve, flush the pipeline to remove soiling and weld residue.
o Make sure the protective end caps from the valve are removed.
o Ensure that the pipe flanges are spread sufficiently to clear valve flanges.
o Be sure that the valve port arrangement matches the desired flow pattern. With the valve in a full
position, insert it, along with appropriate flange gaskets (not included), between the pipeline flanges.
o Insert appropriate size bolts and heavy hex nuts (not included) as recommended for the flange size and
class.
o Verify proper alignment of all components and then tighten the flange bolts according to gasket
manufacturer’s recommended practices or standard piping practices of stipulated torque.
o ATTENTION: Do not operate the valve before flushing the pipeline. Keep the valve in the open position
until flushing is complete. Residue in the line could cause damage to the seats.
OPERATION
1. Note: this manual only covers the operation of manually operated valves. For operation of automated valves,
consult the manufacturer’s manual for the actuator.
2. Ensure that the valve materials are compatible with the service and that the operating characteristics are
below the valves maximum.
3. The manual operation for the proper flow plan is completed by turning the handle one-quarter turn (90º).
4. Markings on the top of the stem provide a visual indication of the flow plan (port position).
MAINTENANCE
Before starting maintenance, please read information contained in the CAUTION section of this manual.
1. Open and close the ball valve at least once to release the pressure completely from the valve body.
2. Ball valves, if correctly used, normally do not need any internal lubrication and maintenance. However, when
necessary, ball, seat, or seals can be replaced by qualified personnel following the instructions of this manual.
3. For further information, refer to the PARTS LIST section.
4. Valve Disassembly:
Note: Some models of FNW flanged multi-port ball valves may be configured differently than what is
indicated below. Specific model number drawings can be obtained at www.fnwvalve.com
DOC: IOM_FNW633-634_ ver_12-2007 Page 2 of 6
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