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8/10/2019 Lit Fta156 Tech

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These guidelines reference the latest technology incartridge, slurry, and split seals. The 84/85 Series

and SL Series cartridge seal designs reduce mainte-nance, training, and downtime costs. They allow forimpeller adjustment by permitting axial shaft move-

ment without pump disassembly. All are designed fora wide variety of services, ranging from water and

wastewater, to chemical and light duty slurry service.

Cartridge mounted SL Series slurry seal designsprovide rugged cross sections for tough applicationsdownstream in the solids treatment area of a waste-water treatment plant.

Flowserve offers split seals for applications where

downtime and equipment disassembly are critical.The PSS II is a split seal for pumps that provides an

ease of installation unmatched in the industry. Usedwith a split flow reducer, flush rates can be limited toless than 20 gph on most applications.

As an introduction to the wastewater treatment

industry, short descriptions of the various processesinvolved in a wastewater treatment plant are at-

tached. They are followed by corresponding sectionsof the selection guide, which summarize recommen-

dations for seal type, materials of construction, andenvironmental controls to obtain the maximumbenefit from the use of the latest sealing technology.

Alternative designs are shown to allow for the mostcost effective selection based on plant practice,

availability of an external flush, difficult equipment

tear down, etc. These seal recommendations shouldbe considered as guidelines denoting the preferreddesigns for the applications listed. In many casesother Flowserve seals may be suitable depending on

application requirements and customer preferences.If you are unsure of the suitability of a recommenda-

tion for a particular application, contact yourFlowserve Representative for assistance.

Equal in importance to proper seal selection is thetraining of engineering, maintenance, and production

personnel in proper installation, operation, andmaintenance procedures. Flowserve offers on-site

and off-site training to assist in implementing asuccessful sealing program.

Seal Descriptions

Seals and information shown represent standard configurations of popular seals for the Wastewater Treat-

ment Industry. Other configurations, sizes, and products are available, consult your Flowserve Representativefor assistance.

PSS IIA balanced, radially split end face mechanical seal that has seal faces, gaskets, and setting devices unitizedinto two semi-cartridge components. Collar and gland assemblies have built-in axial and radial setting clipsthat simplify and ensure installation accuracy. Outside mounted configuration with product located on the seal

face O.D. Standard flush port in the gland. Springs and pins isolated from the product. Positive drive mecha-nisms are used on seal faces and collar for all product types. Flexible stator design and radial clearances

tolerate up to 0.060" total indicated run-out. Wear indicator pins permit visual check of seal setting to estimateface wear and expected run time. Included installation kit provides tools and extra hardware. Standard repairkits available for onsite repair. Material options and operating limits are as follows:

Seal Faces: Carbon versus Aluminum Oxide, Carbon versus Direct Sintered Silicon Carbide, or

Reaction Bonded Silicon Carbide versus Direct Sintered Silicon CarbideMetallurgy: AISI 316 gland and collar with Alloy C-276 springs and set screws

Secondary Seals: Fluoroelastomer, EPR, or TFE-Propylene.

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PSS II

Maximum Pressure: 150 psi (10 bar)Temperature Range: 0F to 250F

(-18C to 121C)

Sizes: 1.500" to 6.000"(38 mm to 152 mm)

larger sizes availableSee FSD125 for more information.

Copyright 2002 Flowserve Corporation


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84/85Cartridge mounted, hydraulically balanced single seals with Alloy C-276 springs isolated outside of the

product and located in the non-rotating component of the seal. Flexibly mounted rotating seal face of DirectSintered Silicon Carbide. The rotary face is stabilized under compression within a protective holder to guardagainst most incidental impacts. Wear indicator pins permit visual check of seal setting to estimate face wear

and expected run time. Designed to fit standard bore or large bore equipment. Material options and operatingconditions are as follows:

Seal Faces: Carbon, Tungsten Carbide, Direct Sintered Silicon Carbide or Graphitized SinteredSilicon Carbide versus Direct Sintered Silicon Carbide

SLM-6000

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Metallurgy: AISI 316 with springs of Alloy C-276other materials readily available

Secondary Seals: Fluoroelastomer, TFE - Propylene,EPR or Perfluoroelastomer

Maximum Pressure: 300 psi (20 bar)

Temperature Range: -40F to 400F(-40C to 204C)

Sizes: 1.125" to 7.750"

(28 mm to 197 mm)

SLM-6000Cartridge mounted, hydraulically balanced single seals with Alloy C-276 springs isolated outside of theproduct and located in the non-rotating component of the seal. Centroid loaded monoblock rotor helps

maintain zero net deflection during operational changes in pressure and temperature. Smooth, contouredpart geometry to reduce erosion and minimize abrasive turbulence. Clamp collar drive provides maximum

axial holding force without galling the sleeve. Addition of the optional QCD (Quench Containment Device)

and SLD (Synthetic Lubrication Device) can help seal performance when equipment is run dry, or tempo-rarily starved for suction. This seal is capable of handling up to 20% solids by weight where Slurry ParticleHardness is at 7 MOH or below. Material options and operating conditions are as follows:

Seal Faces: Reaction Bonded Silicon Carbide (standard), Direct Sintered Silicon Carbide orTungsten Carbide also available.

Metallurgy: Duplex 255 and CD4MCuN with Alloy C-276 SpringsSecondary Seals: Fluoroelastomer, EPR, or TFE- Propylene

Maximum Pressure: 175 psi (12 bar)Temperature Range: 0F to 175F

(-18C to 79C)Sizes: 1.250" to 9.250"

(32 mm to 235 mm)See FSD166 for more information.

Other materials also available.


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Circpac MD

SL-5200

SLM-6000QCD/SLDAll the features of the SLM-6000 with quench containment device (QCD). Use with Synthetic LubricationDevice (SLD) and DuraClear or Semi Synthetic Grease barrier for dry equipment operation.

SLM-6000 QCD/SLDSL-5200Cartridge mounted, hydaulically balanced dual seals with Alloy C-276 springs isolated outside of the productand located in the non-rotating component of the seal. Special shroud is press-fit into the bore of the stator toprotect the compression springs and pins from scaling services and direct barrier fluid for cool operation.Smooth, contoured part geometry to reduce erosion and minimize abrasive turbulence. This seal is capable ofhandling up to 20% solids by weight where Slurry Particle Hardness is at 7 MOH or below. Material optionsand operating limits are as follows:

Seal Faces: Direct Sintered Silicon Carbide versusReaction Bonded Silicon Carbide (standard),Tungsten Carbide and Carbon (standard)

Metallurgy: AISI 316 with Alloy C-276 SpringsSecondary Seals: Fluoroelastomer, EPR, or TFE-Propylene

Maximum Pressure: 150 psi (10 bar) pressurized barrier175 psi (12 bar)non-pressurized barrier0F to 275F(-18C to 135C)with water barrier

Temperature Range: 0F to 175F(-18C to 79C)with oil or other non-waterbarrier fluid,

Sizes: 1.125" to 6.000"(28 mm to 152 mm)

See FSD179 for more information.Other materials also available.

Circpac MDBalanced, segmented circumferential ring seal with hydropad grooves, large bearing pads and a split housingthat mounts outside the seal chamber. Hydrodynamic features reduce gas consumption over 10 times lessthan bushings or labyrinths. Operating window includes pressure up to 100 psi, temperature up to1100F, and speed up to 150 fps. Standard radial clearances of up to 0.25" accommodate thermal growth

and shaft misalignment. Material options and operating limits are as follows:

Maximum Pressure: 175 psi (12 bar)Temperature Range: with QCD, 0F to 275F

(-18C to 135C)with SLD, 0F to 175F

(-18C to 79C)Sizes: 1.250" to 9.250"

(32 mm to 235 mm)See FSD166 for more information.

Rings: Carbon GraphiteHousing: AISI 316, AISI 410 or Alloy 600Springs: Alloy 600

Maximum Pressure: vacuum to 100psi (6.9 bar)Temperature Range: up to 1100F (593C)Maximum Speed: up to 150 fps (45.7 m/s)Sizes: 1.375" to 18.000"

(35 to 457 mm)See FSD195 for more information.


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Flush Plans

Recirculation to Pump Suction on Vertical Pumps

API Plan 13 (ANSI Plan 7313)

Injection of Clean Fluid from External Source


Circulation of Clean Fluid from an External System


External Fluid Reservoir Pressurized; Forced Circulation


External Fluid Reservoir Non-Pressurized; Forced Circulation


Dead Ended, no Flush


seal

end view

seal

end view

seal

end view

seal

end view

seal

end viewseal

end view

Verical Up

Flow

Meter

Pressure

Gauge

Orifice

Check Valve

External Pressure Source

PressureGauge

Low

Pressure

Switch

Strainer

Drain

Fill

Recovery

Vent

Pressure

Gauge

High

Pressure

Switch

Drain

Fill

Supply Tank

Assembly

External Flushing

Source

Supply Tank

Assembly

Orifice


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Primary Treatment Area

Fine Screens or

Comminutors

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Grit

Removal

Primary Settling Clarifiers

Secondary

Treatment AreaInfluent

Large Bar

Screens

Raw Sewage

Pumping Station

Solids Treatment Plant

A facility for handling wastewater normally contains two main sections. The first section processes the waste-water and the other treats the solids that come out of the first plant.

Wastewater Treatment Section Process Summary

In the wastewater processing plant, sewage is put through a series of two or three treatments that remove

and concentrate solids and produce disinfected and/or filtered clean water. Primary treatment removes solidsin the wastewater by physical means; screening, settling and floating. Secondary treatment uses a biological

process to convert the remaining organic material into forms that are separated into solids and a clear liquid,and finishes with chemical and/or UV disinfection of that liquid. Tertiary treatment, including particle filtrationand nutrient removal, is used when the final effluent must be extremely clean.

Primary Treatment Area

Wastewater moves through the plant through a combination of pumps and gravity-fed flow. Often, at severallift stations and at the beginning of the plant, the wastewater is pumped up to a higher elevation to begin thegravity-fed process. This is done usinghorizontal or vertical solids handling dry pit pumps, vertical solids

handling wet pit pumps or submersible solids handling pumps, where the solids content is normally less than.1% by volume (2% solids by weight). Similar equipmentutilizing vortex or recessed impeller designs is used

to move product (still less than 5% solidsby weight) from the Primary Treatment area to the SecondaryTreatment area or into the Solids Treatment plant. Most of these applications can utilize a single seal, either

split or non-split in design. Carbon can be used as one of the seal faces if API Plan 32 (ANSI Plan 7332)using recycled effluent is available. If no clean external flush is available, two hard faces are required. Sub-mersible pumps can be located throughout this area of the plant.


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Primary Treatment Application Guide

Raw Sewage Lift Pumps (before grit removal):Centrifugal (vertical or horizontal) non-clog or recessedimpeller pumps. Single seals on vertical pumps without an external flush will require the use of API Plan 13

(ANSI Plan 7313) or venting of the seal chamber prior to start of equipment.

Seal Recommendations

Split Seal- PSS IIWith API Plan 32 (ANSI Plan 7332) use Material Code E R 7 E F VVWith API Plan 13 (ANSI Plan 7313) or API Plan 02 (ANSI 7302) use Material Code E 4 2 E F VV

Note: API Plan 13 (ANSI Plan 7313) is strongly recommended on vertical pumps

Non Split Seal- Type 84/85With API Plan 32 (ANSI Plan 7332) use Material Code 84-size SVFWith API Plan 13 (ANSI Plan 7313) use Material Code 85-size SVPF


With API Plan 02 (ANSI Plan 7302) use Material Code 85-size SVP

Centrifugal Pumps for Sludge and Effluent: Centrifugal (vertical or horizontal) non-clog or recessed

impeller pumps. Single seals on vertical pumps without an external flush will require the use of API Plan 13(ANSI Plan 7313) or venting of the seal chamber prior to start of the equipment. API Plan 13 (ANSI Plan7313) may also be used on horizontal pumps.


Split Seal- PSS IIWith API Plan 32 (ANSI Plan 7332) use Material Code E R 7 E F VVWith API Plan 13 (ANSI Plan 7313) or API Plan 02 (ANSI 7302) use Material Code E 4 2 E F VV


Non Split Seal- Type 84/85With API Plan 32 (ANSI Plan 7332) use Material Code 84-size SVFWith API Plan 13 (ANSI Plan 7313) use Material Code 85-size SVPF

Note: API Plan 13 (ANSI 7313) is strongly recommended on vertical pumps


Slurry Seal- SLM-6000With API Plan 02 (ANSI Plan 7302) use Material Code B/E 2 2 B/E P L-AQ L-AQ

SL-5200

With API Plan 52 (ANSI Plan 7352), API Plan 53 (ANSI Plan 7353), or API Plan 54 (ANSI Plan 7354)use Material Code E 4/R 2 E F VV

Submersible Solids Handling Pumps


Elastomer Bellows Single Spring Seal - Type 21/31With API Plan 32 (ANSI Plan 7332) use Material Code B C F J FWith API Plan 02 (ANSI Plan 7302) use Material Code V X F X F


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Secondary Treatment Area

The Secondary Treatment Area takes wastewater coming out of the Primary Treatment Area, and moves it

through Aeration Tanks, Final Clarifiers & Disinfection. When it enters the Secondary Treatment area, thismaterial still contains solids & dissolved materials. Aeration Tanks provide an environment ideal for microor-

ganisms to break down organic materials and nutrients. Final Clarifiers are used to generate three differentproducts; microorganisms recycled back to the Aeration Tanks, excess microorganisms that are moved to the

Solids Treatment Plant, and water that is sent on to Tertiary treatment and/or Disinfection Basin. Submersiblepumps can be located throughout this area of the plant.

Secondary Treatment Area

Aeration Tanks

Final Settling/Clarifiers Tertiary

Treatment Area

Disinfection

Basin

De-chlorination

if applicable

Solids

Treatment

Plant


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Secondary Treatment Application Guide

Centrifugal Pumps for Sludge & Effluent: Centrifugal (vertical or horizontal) non-clog or recessed impellerpumps. Single seals on vertical pumps without an external flush will require the use of API Plan 13 (ANSI

Plan 7313) or venting of the seal chamber prior to start of the equipment.


Split Seal - PSS IIWith API Plan 32 (ANSI 7332) use Material Code E R 7 E F VVWith API Plan 13 (ANSI 7313) or API Plan 02 (ANSI 7302) use Material Code E 4 2 E F VV


Non Split Seal- Type 84/85With API Plan 32 (ANSI 7332) use Material Code 84-size SVFWith API Plan 13 (ANSI 7313) use Material Code 85-size SVPF


With API Plan 02 (ANSI 7302) use Material Code 85-size SVP


SL-5200

With API Plan 52 (ANSI Plan 7352), API Plan 53 (ANSI Plan 7353), or API Plan 54 (ANSI Plan 7354)

use Material Code E 4/R 2 E F VV

Fans/Blowers for Aeration


Segmented Circumferential Gas Seal - Circpac MD

Single: use Material Code - R9 - E P - VMultiple: use Material Code - R9 - E P - V



Elastomer Bellows Single Seal - Type 21/31With API Plan 32 (ANSI Plan 7332) use Material Code B C F J F

With API Plan 02 (ANSI Plan 7302) use Material Code V X F X F


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Tertiary Treatment Area

If local water regulations require it, or if the water is intended for use in irrigation, it may also be passedthrough filters of sand and crushed coal to remove additional small particles, or treated further to reducenutrient levels. The clean water that results (clarified effluent) can be pumped back to the plant to be used for

clean external flush (API Plan 32) or for other purposes.

Solids Treatment Plant Process Summary

In the Solids Treatment Plant, sludge removed from Settling/Clarifiers is thickened using Settling Tanks(Thickeners), Dissolved Air Flotation Thickeners (DAFs), Belt Thickeners and Digesters, along with Pressesand/or Centrifuges. As material moves through these processes, the sludge becomes a heavier slurry. As this

happens, progressive cavity pumps or positive displacement pumps replace the non-clog (recessed impeller)centrifugal pumps used in earlier stages. Submersible pumps can be located throughout this area of the plant.

Solids Treatment Plant

Primary Settling/

Clarifiers from

WastewaterTreatment Plant

Final Settling/Clarifiers

from Wastewater

Treatment Plant

Settling Tanks/

Thickeners/

Gravity Belts

Digesters

Blending Tanks

Filter Press,

Belt Press,

Centrifuges and/or

Drying Beds

Biosolids can be used

directly as fertilizer,to

aid in land reclamation,

or mixed with compost

for soil enrichment.

Some is put in landfills.

Water is cycled back to

Primary Treatment area of

Wastewater Treatment Plant

Water is cycled back to

Primary Treatment area

of Wastewater Treatment Plant


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Centrifugal Pumps for Sludge & Effluent: Centrifugal (vertical or horizontal) non-clog or recessed impeller pumps.Single seals on vertical pumps without an external flush will require the use of API Plan 13 (ANSI Plan 7313) or

venting of the seal chamber prior to start of the equipment.


Split Seal- PSS IIWith API Plan 32 (ANSI Plan 7332) use Material Code E R 7 E F VVWith API Plan 13 (ANSI Plan 7313) or API Plan 02 (ANSI Plan 7302) use Material Code E 4 2 E F VV


Non Split Seal- Type 84/85With API Plan 32 (ANSI Plan 7332) use Material Code 84-size SVF

With API Plan 13 (ANSI Plan 7313) use Material Code 85-size SVPFNote: API Plan 13 (ANSI Plan 7313) is strongly recommended on vertical pumps



SL-5200With API Plan 52 (ANSI Plan 7352), API Plan 53 (ANSI Plan 7353), or API Plan 54 (ANSI Plan 7354)


Thickened Sludge Pumps & Sludge Feed Pumps: Progressive Cavity or Positive Displacement Pumps.


Split Seal- PSS IIWith API Plan 32 (ANSI Plan 7332) use Material Code E R 7 E F VV




Digester-Process Pumps: Progressive Cavity or Positive Displacement Pumps





Split Seal- PSS IIWith API Plan 32 (ANSI Plan 7332) use Material Code E R 7 E F VV

Non Split Seal- Type 85With API Plan 32 (ANSI Plan 7332) use Material Code 84-size SVF


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ISO 9000

Certified

Licensees, authorized agents, and affiliated companies located worldwide.

The information and specifications presented in this product brochure are believed to be accurate, but are supplied for information purposes only and should not be considered certified or as a guarantee of satisfactory results by reliance thereon. Nothing contained herein is to be construed

as a warranty or guarantee, express or implied, with respect to the product. Although Flowserve Corporation can provide general application guidelines, it cannot provide specific information for all possible applications. The purchaser/user must therefore assume the ultimate responsibility

for the proper selection, installation, operation and maintenance of Flowserve products. Because Flowserve Corporation is continually improving and upgrading its product design, the specifications, dimensions and information contained herein are subject to change without notice.

Primary Worldwide Flow Solutions Division Locations

www.flowserve.com

Printed In USA Copyright 2002 Flowserve Corporation

Kalamazoo, MIPhone 269-381-2650Fax 269-382-8726

United States Netherlands

DortmundPhone 49-231-6964-0Fax 49-231-6964-248

Germany

Edmonton, AlbertaPhone 708-463-7958Fax 708-450-1241

Canada

Sao PauloPhone 55-11-4066-8600Fax 55-11-4066-7014

Brazil

TlaxcalaPhone 52-2-461-6791Fax 52-2-461-6847

Mexico

Phone 65-6-8465100Fax 65-6-747-1963

Singapore

Scarborough, OntarioPhone 416-292-2877Fax 416-292-5190

OsakaPhone 81-720-85-5571Fax 81-720-85-5575

Japan

Argentina Australia

RoosendaalPhone 31-165-581400Fax 31-165-552622

Marayong NSWPhone 61-2-8822-7100Fax 61-2-9679-7511

Villa MartelliPhone 54-11-4709-6800Fax 54-11-4709-7072

ORG 09/02

FTA156



Elastomer Bellows Single Spring Seal - Type 21/31With API Plan 32 (ANSI Plan 7332) use Material Code B C F J F

With API Plan 02 (ANSI Plan 7302) use Material Code V X F X F

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