Flowserve Durametallic P-200 User manual

Installation
Instructions
Experience In Motion
Cartridge dual pusher seal for
standard and big bore ANSI pumps
Durametallic®P-200

2
Description
This P-200 seal is a dual, cartridge mounted, end face mechanical seal,
designed for ease of installation. No seal setting dimensions are
required. Removable setting devices provide proper alignment. Installa-
tion according to the following steps will ensure a long trouble-free life
of the P-200 seal.
1 Equipment Check
1.1 Follow plant safety regulations prior to equipment disassembly:
• Lock out motor and valves.
• Wear designated personal safety equipment.
• Relieve any pressure in the system.
 •ConsultplantMSDSlesforhazardousmaterialregulations.
Seal Chamber Requirements Figure 1
To first obstruction
Shaft or sleeve OD
+0.000 mm (+0.000 inch)
-0.050 mm (-0.002 inch)
+0.000 mm (+0.000 inch) API 610/682
-0.025 mm (-0.001 inch) DIN/ISO
ASME
Seal housing face to have surface finish
of 1.6 μm (63 μinch) Rafinish or better.
Gland pilot can be at either
of these register locations.
Seal housing bore to have 3.2 μm
(125 μinch) R
a
finish or better.
Sleeve or shaft finish to be
0.8 μm (32 μinch) Raor better.
The images of parts shown in these instructions may differ visually from the actual
parts due to manufacturing processes that do not affect the part function or quality.

Dimensional Data for P-200 Seal (inches)
3
P-200 Dimensional Data Figure 2
*ThissealsizeusestheN-CBRinnersealrotaryunit.
†Preferreddesignfortheseshaftsizes.Usewheneverpossible.
.03
A
Shaft & Seal
Size
C
B
K
ø
D F
E
G NPT marked "Flush" should be
plugged when not used for flushing
4 H ø studs
equally
spaced on J
BC
2 G NPT for
sealing fluid inlet
and outlet.
1.000 1.750 1.875 1.78 1.69 2.00 1.02 0.375 0.375 2.75 3.75
1.125 1.750 2.000 1.78 1.69 2.00 1.02 0.375 0.500 3.00 3.88
1.250 2.000 2.125 1.97 1.88 2.00 1.02 0.375 0.500 3.12 4.25
1.375 2.000 2.250 1.97 1.88 2.00 1.02 0.375 0.375 3.25 4.25
1.500 2.250 2.500 1.97 1.88 2.00 1.02 0.375 0.375 3.75 4.75
1.625 2.375 2.625 1.97 1.88 2.00 1.02 0.375 0.500 3.75 4.75
1.750 2.500 2.750 1.97 1.88 2.00 1.02 0.375 0.500 3.75 5.00
1.875 2.625 2.875 1.97 1.88 2.00 1.02 0.375 0.500 3.88 5.00
2.000 2.750 3.000 1.97 1.88 2.00 1.02 0.375 0.625 4.12 5.12
2.125 2.875 3.250 1.97 1.88 2.00 1.02 0.375 0.625 4.38 6.00
2.250 3.000 3.375 1.97 1.88 2.00 1.02 0.375 0.625 4.62 6.50
2.375 3.250 3.625 2.16 2.06 2.09 1.11 0.375 0.625 5.00 6.38
2.500 3.375 3.750 2.16 2.06 2.09 1.11 0.375 0.625 5.00 6.62
2.625 3.500 3.875 2.16 2.06 2.09 1.11 0.375 0.750 5.75 7.25
2.750 3.750 4.062 2.16 2.06 2.62 1.58 0.500
2.875 3.875 4.187 2.16 2.06 2.62 1.58 0.500
3.000 4.000 4.312 2.16 2.06 2.62 1.58 0.500
3.125 4.250 4.562 2.16 2.06 2.62 1.58 0.500
3.250 4.375 4.687 2.28 2.19 2.75 1.71 0.500
3.375 4.500 4.812 2.28 2.19 2.75 1.71 0.500
3.500 4.625 4.937 2.28 2.19 2.75 1.71 0.500
3.625 4.750 5.062 2.28 2.19 2.75 1.71 0.500
3.750 4.875 5.187 2.28 2.19 2.75 1.71 0.500
3.875 5.000 5.312 2.28 2.19 2.75 1.71 0.500
A B B C D E F G H J K
Shaft&BoxBore BoxDepthSeal Seal Gland NPT BoltDia. BoltCircle GlandOD
SealSize (Min) (Max) (Min)DepthExtensionThickness(Max)(Max)(Min)
The bolt diameter, bolt
circleandglandODfor
shaftandsealsizes
2.750 inches through
3.875 inches will be
determined by equipment
requirements.

1.2 Disassemble equipment in accordance with equipment manufac-
turer’sinstructionstoallowaccesstosealinstallationarea.
1.3 Remove existing mechanical seal and gland or compression
packingandpackinggland(followerange).
1.4 Make sure the shaft or sleeve is free of burrs, cuts, dents or
corrosion that might cause leakage past the sleeve gasket, as
shown on the assembly drawing. Replace worn shaft or sleeve.
Remove sharp edges from keyways and threads.
1.5 Make sure the seal housing face is clean and free of burrs, cuts,
dents or corrosion that might cause leakage at the gland gasket or
misalign the seal gland.
1.6 Check equipment dimensions to ensure they are within the
dimensions shown in Figures 1 and 2. Critical dimensions include
shaftorsleeveOD(A),chamberdepth(C),minimumandmaxi-
mumsealhousingbore(B),andtheminimumdistancetotherst
obstruction(E)plus3.175mm(0.125inch).
1.7 Check gland bolting to ensure that bolt diameter (H) and bolt
circle (J) conform to the dimensions shown in Figure 2.
1.8 Handle the P-200 seal with care, it is manufactured to precise
tolerances. The sealing faces of the rotating face and stationary
faceareofspecialimportance.Theyarelappedattowithinthree
light bands (34.8 millionths of an inch). Keep the seal faces
perfectly clean at all times.
4

5
Install pump backplate
Figure 3
2 P-200 Seal Installation
Tools needed:
• Open-end wrench for gland nuts
• Allen wrenches provided
• Silicone lubricant provided
2.1 Lubricate the shaftorsleeveODlightlywiththesiliconelubricant
provided and slide the complete P-200 cartridge seal onto the
shaft, with the end with the setting devices toward the bearing
housing.
2.2 Install pump back plate (sealchamber/stufngbox),Figure3.
Position the P-200 seal gland ush connection, port a in Figure 4,
in the 3 o’clock position for normal installations with CW rotation
(9o'clockforCCWrotation)foroptimumheatremoval.Alternate
positioning of the gland may be necessary with some pump designs
to permit seal piping to clear the bearing housing. Refer to the
assembly drawing that is supplied with the seal for proper position-
ing. Bolt the back plate in place on the bearing housing.

6
2.3 Position the P-200 cartridge gland with the gland gasket in place
againstthepumpbackplate(sealchamber/stufngbox)face,
installatwashersonthestudstopreventmisalignment,and
tighten the gland nuts evenly, cross-staggering the adjustment
of the nuts. Do not over tighten.
2.4 Assemble the pump, adjust the bearings, set the impeller
and connect the coupling so that the shaft is in its operating
axialposition.Anysubsequentaxialadjustmentoftheshaft
requires resetting of the seal. Connect pump piping,
(see Section 3) allowing no pipe strain on the pump casing.
2.5 Tighten the set screws ontheP-200cartridgecollarwiththeAllen
wrench provided.
2.6 Remove setting devices by removing the cap screws with the
Allenwrenchprovided.Savethesettingdevicesforuseifpump
impeller must be reset or if the P-200 is removed for maintenance.
2.7 Turn the shaft by hand to ensure free operation.
2.8 Pipe up the gland connectionstotheP-200sealasexplainedin
Section 3.
2.9 See Operational Recommendations, Section 4, before starting
pump.
3 Piping
3.1 Install an ANSI 7311 ush for horizontal pumps or ANSI 7313
for vertical pumps. from the pump discharge to the P-200 seal
ushport,aFigure4.Tomaximizeseallife,Flowserverecom-
mendsaproductbypassushbeusedwheneverpossiblewitha
P-200sealinstalledinconventionalstufngbox.Abypassushis
not necessary when an enlarged tapered or cylindrical seal cham-
berisused.Ifabypassushisnotused,plugtheushporta.

7
Shaft Rotation from Exposed End of Gland Figure 4
Clockwise Rotation (CW)
(mostANSIpumps)
Inlet Port c
Outlet  Port b
Counterclockwise Rotation (CCW)
Inlet Port b
Outlet  Portc
b
a
cb
a
c
CCW
Rotation
CW
Rotation
3.2 Taps b and c in the gland are buffer/ barrier uid inlet and
outlet ports. Which is the inlet port depends on the direction of
shaft rotation.

3.3 For dual pressurized seal (double seal) operation, supply a clean
compatiblebarrieruidtotheinletportatapressureatleast
170 kPa (25 psi) above the seal chamber pressure. See Figure 5.
Thepressureofthebarrieruidmustnotexceedtherecommended
maximumpressure.Flowservecansupplyinformationonbarrier 
uidowrequirementsbasedonsealsize,producttemperature, 
barrieruidcharacteristics,andshaftspeed.
3.4 For dual unpressurized (tandem seal) operation, supply a clean
compatiblebufferuidtotheinletportatapressurebelowtheseal
chamber pressure. See Figure 6. The pressure in the seal
chambermustnotexceedtherecommendedmaximumpressure. 
Flowservecansupplyinformationonbufferuidowrequirements
basedonsealsize,producttemperature,bufferuidcharacteris-
tics, and shaft speed.
3.5 The Flowserve supply tank is designed to work with the P-200
seal to form a self-contained sealing system. The circulating
featureintheP-200providesapositivebuffer/barrieruidow
from the seal cavity to the supply tank and back to the seal.
In most cases the natural cooling of the piping and tank are
adequate to remove seal-generated heat. Cooling coils are
availablewiththesupplytanktoextendoperatinglimits. 
The supply tank can be used with the P-200 seal in the dual
pressurized,Figure5,ordualunpressurized,Figure6, 
operating modes.
Recommendation: For enhanced seal performance and reduced
coking, use DuraClearasabarrieruid.RefertoDuraClearbrochure
FSD123 or contact a Flowserve seal application engineer for further
details.
3.6 Goodpipingpractices:     
• minimizelinelosses     
• use large diameter tubing
• only upward sloping lines
• use long radius bends
• minimizecomponentlosses    
• optimizeforthermosyphon    
• check rotation direction
• test for leaks
8

9
Dual pressurized P-200 with Supply Tank Figure 5
Dual unpressurized P-200 with Supply Tank Figure 6
Pressure source
1.2 m (4 feet)
maximum
0.45 -0.6 m
(1.5 - 2 feet)
minimum
Orifice
option
Bypass line
from pump
discharge
Supply
tank
assembly
normally open
Level switch (low)
Pressure
switch
(low)
Pressure
indicator
Cooling
coils
Drain
normally
closed
PipingPlan11/53A
Vent
1.2 m (4 feet)
maximum
0.45 -0.6 m
(1.5 - 2 feet)
minimum
Orifice
option
Bypass line
from pump
discharge
Supply
tank
assembly
normally open
Level switch (high)
Level switch (low)
Pressure
switch
(high)
Pressure
indicator
Cooling
coils
Drain
normally
closed
Piping Plan 11/52

10
4 Operation
FollowingtheserecommendationswillensuremaximumMTBPM
of the P-200 seal.
4.1 Do not exceed corrosion limits. The P-200 is designed to resist
corrosionbymostchemicals.However,donotexposetheP-200
materials of construction to products outside of their corrosion
limits. The P-200 assembly drawing lists the materials of
construction. For chemical resistance ratings, consult Flowserve.
4.2 Do not exceed the pressure-velocity (P-V) limits.
4.3 Do not exceed the temperature limits of the P-200.
The materials of construction are listed on the assembly drawing.
For the temperature limits of materials, consult Flowserve.
Turn on any cooling water to the supply tank before start-up.
4.4 Do not start up or run the P-200 dry.Buffer/barrieruidmust
be in the seal cavity at all times during pump operation.
For special problems encountered during installation, contact your
nearestFlowserveSalesandServiceRepresentativeorAuthorized
Distributor.