Keystone Manuals: Series V30/V32 Marine High Performance Butterfly Valves, Keystone-EN Manuals & Guides

KEYSTONE SERIES V30 / V32 MARINE HP BUTTERFLY VALVES

INSTALLATION AND OPERATION MANUAL

Before installation these instructions must be fully read and understood

they were not damaged in handling. This is
especially important in the case of valves with
‘fail- open’ actuators.

2.4

Confirm that the materials of construction
listed on the valve body are appropriate for the
service intended and are as specified.

2.5

Locate the directional arrow on the valve name
plate that defines the preferred mounting
orientation in respect to the pressure. In most

1 GENERAL

Suggested installation orientation is with valve
shaft horizontal or inclined from vertical. Unless
otherwise recommended by Emerson, mount
the valve in the preferred direction with the
directional arrow pointing to the lower pressure
side so that the front face of the disc will be
upstream when the valve is in the closed position.
Thermal insulation of the body is mandatory for
operating temperatures above 200 °C (392 °F).
The Keystone marine high performance butterfly
valve offers the following body styles: Series V30
for wafer style and Series V32 for lug style.

2 INSPECTION

2.1

cases, the valve is properly installed when the
actual fluid flow or high pressure is acting on the
front face of the disc when the valve is closed.

2.6

Ensure that the packing seal cover screws are tight.

CAUTION

The valve should be installed in the closed position
to insure that the seat and disc are not damaged
during installation. Particular care should be taken
with valves equipped with ‘fail open’ actuators.
Failure to insure proper handling may result in
damage to the valve. If the pipe is lined, confirm
that the disc rotation does not contact the lining
during the opening stroke. Failure to confirm that
the disc rotation does not contact the lining may
result in damage to the valve.

Carefully remove the valve from the shipping
package (box or pallet) to avoid any damage to
the valve and, in the case of automated valves,
to the electric or pneumatic/hydraulic actuator
or instrumentation.

2.2

Prior to installation, clean the inside of the
valve. Insure that there are no solid objects
such as pieces of wood, plastic or packing
materials within the valve or on the valve seat.

2.3

Inspect the seat and disc edge to insure that

Emerson.com/FinalControl

IMPORTANT

Whenever possible, install the valve with the shaft
in the horizontal position and, if possible, with the
cast-in disc stop located top-side of the pipe. If the
shaft cannot be positioned horizontally, position
the shaft so that it is not on the vertical centerline
in a horizontal pipe run. This will minimize any
depositing of solid particles present in the fluid
into the lower bearing.

Keystone is either a registered trademark of Emerson
International Service AG or its affiliates in the United
States and/or other countries. All other brand names,
product names, or trademarks belong to their
respective holders.

© 2017 Emerson. All rights reserved. VCIOM-02541-EN 20/08

KEYSTONE SERIES V30 / V32 MARINE HP BUTTERFLY VALVES

INSTALLATION AND OPERATION MANUAL

3 INSTALLATION

The valves are shipped with flange gasket
surface protection. Before installing the valve,
remove the protection and carefully clean and
de-grease both surfaces with a solvent.

3.1 SERIES V32 - LUG STYLE

3.1.1 Orient the valve with the directional flow
arrow (preferred direction) pointing in the
proper direction.

3.1.2 Insert the valve between the flanges until
the two bottom holes in the valve align
with the two lower flange holes.

3.1.3 Insert a bolt or stud through the flange
and thread it into the holes in the valve
body. This will allow the valve to center
itself properly for the installation of the
flange gaskets.

3.1.4 Install the flange gaskets and the
remaining flange bolting.

3.1.5 Use the crossover method to tighten all
flange bolts.

3.2 SERIES V30 - WAFER STYLE

3.2.1 Orient the valve with the directional flow
arrow (preferred direction)pointing in the
proper direction.

3.2.2 Insert the valve between the flanges until
the alignment holes at either side of the
valve match the corresponding holes in
the flanges.

3.2.3 Insert a long bolt or stud through
the flange and thread it through the
alignment hole. This will allow the valve to
center itself properly for the installation
of the flange gaskets.

3.2.4 Install the flange gaskets and the
remaining flange bolting.

3.2.5 Remove the long bolts/studs from the
lower alignment holes and replace with
correctly-sized bolts.

3.2.6 Using the crossover method, tighten all
flange bolts.

4 VALVE CHECKOUT

4.1

Tighten the packing seal screws just enough to
prevent shaft leakage.

4.2

4.3

For automated valves, set the air pressure/
electrical voltage for at least the minimum
given to operate the actuator. For pneumatic
actuators, do not apply more than 1.25 times
the pressure for which the actuator was
designed.

NOTE

For spring return actuators with positioners,
overpressure will cause excessive time delay in the
spring movement for the valve disc to travel out of
the seat.

5 OPERATION

The Series V30/V32 has been designed to
require a minimum of maintenance. Generally,
only maintenance on the packing seal box is
required.

6 MAINTENANCE

If shaft leakage is observed through the packing
box, replace the packing seal O-rings.

7 DISASSEMBLY

To begin disassembly, refer to the part lists and
proceed as follows:

WARNING

Depressurize the valve and associated piping
before disassembly. Failure to do so may cause
serious personal injury and/or equipment
damage.

1. Remove the valve from the line. Clean
the valve according to proper cleaning
procedures as outlined by the plant or
according to a prescribed procedure.

2. Remove the actuator and relevant
connecting key. Note the actuator position
relative to the valve.

CAUTION

Throughout disassembly and assembly, always
use cardboard or brass shims to protect the
valve body, disc, flange and sealing surfaces from
damage. Failure to do so may result in serious
damage to the valve.

7.1 REMOVING THE DISC-TO-SHAFT TAPERED
PIN CONNECTIONS

7.1.1 Open the valve disc to its full open
position.

NOTE

On valve sizes DN 250 (NPS 10) and larger, it is
recommended that two workers perform the disc
tapered pin removal process.

7.1.2 Place the disc in a vise

7.1.3 Using a tool steel punch, locate the punch
on the small end of the disc taper pin
and then strike the punch with a heavy
hammer.

NOTE

Some of the weld on the taper pins may need to be
removed by grinding.

WARNING

When placing the valve into the bench vise, make
sure the small end of the disc taper pin faces the
assembler. Hold the punch with a punch holder
or a pair of vise grips. Otherwise, serious injury
may occur.

7.2 REMOVING THE BOTTOM COVER

ASSEMBLY (APPLICABLE ABOVE DN 300
(NPS12))

To disassemble the bottom cover assembly,
remove the following bottom cover assembly
components:

• bottom cover plate

• washer

• bolts

Check the operation of the valve by stroking
it to ‘full open’ and ‘full close’. To determine
the valve orientation of the disc, keyways are
aligned with the disc. The valve disc travels
clockwise to close.

2

KEYSTONE SERIES V30 / V32 MARINE HP BUTTERFLY VALVES

INSTALLATION AND OPERATION MANUAL

7.3 REMOVING THE PACKING SEAL COVER
ASSEMBLY

7.3.1 Untighten the packing seal screws.

7.3.2 Remove the packing seal cover.

7.4 REMOVING THE SHAFT AND DISC

7.4.1 When removing the shaft from the disc,
clamp the vise jaws on to the shaft area
above the valve body top plate.

7.4.2 Once the vise jaws are secure against
the shaft, drive the wedge-shaped
chisel/punch between the valve body top
plate and the bench vise.

7.4.3 As the valve body moves away from the
bench vise, the shaft is removed from the
disc hubs.

7.4.4 Continue to reposition the valve body with
the bench vise so as to allow removal of
shaft.

CAUTION

Physically hold the disc to prevent from falling and
becoming damaged during removal. When shaft is
removed from the disc, the disc is unsupported.

WARNING

Smaller discs may be removed by hand DN 50 to
DN 200 (NPS 2 to NPS 8). Remove larger discs
with proper hoisting equipment. Failure to do
so may result in personal injury or damage to
equipment.

7.5 REMOVING THE SEAT RETAINER RING

Remove the seat retainer ring by removing the
hex socket screws from the seat retaining ring
inserted into the body.

7.6 REMOVING THE SEAT ASSEMBLY

To remove the seat assembly.

7.7 REMOVING THE PACKING SEAL

ASSEMBLY FOR PACKING SEAL
REPLACEMENT WITH SHAFT IN BODY

7.7.1 Using the screws, grab and remove each
packing seal.

7.8 REMOVING THE SHAFT BEARINGS
(ABOVEDN300 (NPS 12))

NOTE

A special bearing removal/installation tool is required
to remove or install the shaft bearings (5). The tool
O.D. dimension should be as near in size as the valve
shaft bore I.D. dimension and have a Class 3 fit. Any
Machinist Handbook can provide Class 3 tolerances.

7.8.1 Insert the removal tool in the valve body
top plate area and down the shaft journal
until the tool contacts the upper bearings.

7.8.2 Remove the upper bearings by striking
the tool with a hammer.

7.8.3 Insert the removal tool in the valve body
bottom plate area and down the shaft
journal until the tool contacts the lower
bearing.

7.8.4 Strike the tool until the lower bearing (5)
is clear of the lower body shaft journal.

7.9 INSPECTING THE VALVE COMPONENTS

7.9.1 After disassembly, visually inspect the
seat retainer ring and the bottom cover
plate.

7.9.2 Make sure all body sealing surfaces:

• are flat

• are free of corrosion damage

• have a smooth surface

• are free of burrs.

Remove any burrs with fine grit

sandpaper.

7.9.3 Inspect for scratches around disc edges:

• If scratched, smooth the edge with

fine grit sandpaper (220/400 wet/dry
sandpaper)

• Remove the scratch by using a blending

motion and extend the smoothed area
at least two inches above, below and
around the original scratch

• To polish the disc edge, use a powered

wire brush

• Finish sand or polish the edge on a

lathe, as required.

7.9.4 Check to see that the shaft-to-bearing
contact locations are free of galling.

7.9.5 Check to see that the shaft-to-packing
seal contact area is free of scratches.

FIGURE 1

FIGURE 2

FIGURE 3
Seat retainer ring and screws

NOTE

To remove the packing seal with the shaft still in the
valve body, two long, slender screws are required.
must be at least eighty millimeter long. The most
commonly used screws are ‘drywall screws’.

NOTE

If scratched or galled, these surfaces should be
polished or replaced.

3