Cemline Steel TanksCemline steel tanks are provided with 12”x 16”elliptical manholes on...

Cemline Steel Tanks

Carbon Steel, Stainless Steel, Galvanized Steel, CopperASME Code, Non-Code

Cemline Steel Tanks

CEMLINE CORPORATIONP.O. BOX 55 CHESWICK, PENNSYLVANIA 15024Phone: (724) 274-5430 FAX (724) 274-5448

www.cemline.com

Cemline® Steel TanksConstruction and Design

Cemline manufactures tanks and pressure vessels to suit customerrequirements. Tanks are custom fabricated as to size, working pressure,and openings. We can build any tank to whatever configuration is spec-ified. For more information about Cemline products, contact the factoryor our representative.

Standard Steel Tank Package Features

Sizing . . . . . . . . . . . . . . . . . . . . . . . . . . .Cemline tanks are manufactured in a wide range of sizes. Tank diameter is measured over the outside of the head and length refersto the overall tank length.

Construction . . . . . . . . . . . . . . . . . . . . .Cemline steel tanks are manufactured in strict accordance with ASME Code requirements and National Board Registration. Non-Code tanksare also available.

Material . . . . . . . . . . . . . . . . . . . . . . . . .Cemline tanks are normally constructed of pressure vessel quality carbon steel. Stainless Steel in grades 304 or 316 and 90:10 Cupro-Nickel can be furnished. Consult factory for other materials.

Working Pressure . . . . . . . . . . . . . . . . .Cemline steel tanks can be built in accordance with working pressuresdesigned to suit particular jobs. Tanks are usually built for 125 psigworking pressure, but we are able to provide tanks with workingpressure from 0 to 500 psig.

Connections . . . . . . . . . . . . . . . . . . . . .NPT threaded openings are furnished. Tanks are built with the location and size of the openings to suit customer requirements. Flangedopenings are normally ANSI standard for 150#, 300#, 600#, and speciallydrilled flanges can be furnished.

Manhole . . . . . . . . . . . . . . . . . . . . . . . .Cemline steel tanks are provided with 12” x 16” elliptical manholes on42” diameter and larger as required by the ASME Code. Smaller tankdiameters do not require a manhole, but manhole or handhole can beprovided if so specified. (Other manhole and handhole sizes areavailable and can be furnished upon request.)

Exterior . . . . . . . . . . . . . . . . . . . . . . . . .Cemline steel tanks are normally furnished with factory primedexterior. Special paints and coatings are available upon request.

Galvanizing . . . . . . . . . . . . . . . . . . . . .Cemline tanks through 60” diameter can be hot dip galvanized at customer request.

Paint Coatings . . . . . . . . . . . . . . . . . . .Cemline tanks can be furnished with interior or exterior coated to customer specifications. Cemline can provide epoxy linings to meet customer requirements.

Send Cemline your requirements for a prompt quotation.

2

VesselwithRemovableTop

VerticalSteel TankwithAngle Legs

Cemline® Steel TanksGallon Capacities

The dimensions below are for Cemline steel tanks and are actualcapacities in gallons.

3

HorizontalTank with Stand.

Cemline steel tanks awaiting shipment.

Length 12” 14” 16” 18” 20” 24” 30” 36” 42” 48” 54” 60” 66” 72” 84” 96”

2’ 11 14 20 22 28 40

3’ 17 22 30 35 44 63

4’ 23 30 40 48 60 87

5’ 30 38 50 61 76 110 170 240 320 410 510 590 740 785 1140 1440

6’ 35 46 60 74 92 135 205 290 390 500 620 740 910 1010 1420 1820

7’ 41 54 70 87 108 155 245 340 460 590 730 890 1080 1235 1700 2200

8’ 47 62 80 100 124 180 280 395 530 680 850 1040 1250 1460 1980 2580

9’ 200 315 445 600 770 970 1190 1420 1685 2260 2960

10’ 220 350 495 670 860 1085 1330 1595 1880 2540 3340

11’ 250 385 545 740 955 1200 1470 1775 2080 2820 3720

12’ 265 425 605 810 1050 1310 1610 1940 2280 3105 4090

13’ 292 465 650 880 1140 1430 1760 2110 2480 3380 4460

14’ 315 500 700 950 1235 1550 1905 2290 2700 3660 4840

15’ 535 750 1020 1320 1660 2040 2460 2900 3940 5220

16’ 570 800 1090 1410 1780 2190 2630 3100 4220 5590

17’ 1160 1500 1900 2330 2800 3325 4500 5960

18’ 1230 1590 2015 2475 2980 3520 4780 6340

19’ 1680 2130 2620 3150 3720 5060 6720

20’ 1770 2240 2760 3320 3920 5340 7090

21’ 2360 2910 3500 4140 5620 7460

22’ 2470 3060 3670 4340 5900 7840

23’ 3210 3840 4550 6180 8220

24’ 3360 4010 4750 6460 8590

25’ 4180 4960 6740 8960

Capacity GallonsDiameter

Vertical Tank with Angle Legs and Multiple Flanged Openings.

Cemline® Tanks

Cemline steel tanks are available in working pressure from 0# to 500# psi.Normally steel tanks are furnished for 125# working pressure. Openings,both threaded and flanged, can be located in the tank to suit therequirement of the application. typical uses are shown below.

Types Uses

Chilled Water Buffer Tanks . . . . . . . . . Designed to be used with chillers which do not have water volume of sufficient size in relation to the chiller. The CWB adds volume to buffer the system against poor temperature control, erratic system operation, and excessive compressor cycling.

System Efficiency Buffer Tanks . . . . . . Used with hydronic heating systems. The SEB improves efficiency of

Flash Tanks . . . . . . . . . . . . . . . . . . . . . .Flash tanks are used to flash steam from condensate from high pressure systems prior to introducing into low pressure lines and to flashcondensate prior to returning to the boiler or condensate tank.

Condensate Tanks . . . . . . . . . . . . . . . .Condensate tanks are used in steam systems to store condensate until it is needed to be returned to the boiler.

Blow Down Tanks . . . . . . . . . . . . . . . . .Blow Down tanks are used to receive blow-off from boilers and allow it to cool before the blow down is discharged into the sewer system.

Expansion-Compression Tanks . . . . .Hydronic Heating Systems

Air Receiver Tanks . . . . . . . . . . . . . . . .Air storage in air systems.

Unfired Steam Generators . . . . . . . . .Generate steam from steam or high temperature hot water.

Storage Tanks . . . . . . . . . . . . . . . . . . . .Storage of liquids, gases or solids.

Hoppers . . . . . . . . . . . . . . . . . . . . . . . .For mixing and storage of solids or liquids.

Tanks for Special Uses . . . . . . . . . . . . .To suit customer requirements.

Rectangular Tanks . . . . . . . . . . . . . . . .Custom rectangular tanks to meet customer requirements.

Any of the above tanks can be supplied in Carbon Steel, Stainless Steel, Galvanized Steel,or Copper Nickel.

Rectangular Non-pressurizedTank.

4

the heating system by adding volume to the system preventing shortcycling and nuance shut downs. It eliminates the need for an airseparator, while acting as a primary/secondary hydraulic separatorin the system.

5

Cemline® Flash and Blow Down Tanks

Cemline manufactures a variety of flash and blow down tanks which aredescribed in detail in separate brochures.Request brochures from your localrepresentative or contact Cemline.

Flash TanksRequest Cemline “FST Series” brochure.

Pressure Tank withConical Bottom.

Blow Off TanksRequest Cemline “BOT Series” brochure.

Centrifugal Blow Off/Condensate CoolerRequest Cemline “CBO Series” brochure.

Dia. “A”24 22”30 24”36 26”

42 18”48 20”

Dia. “A”54 22”60 24”66 28”72 30”84 42”96 42”

Number ofTank Diameter Coupling Size Flanges

12” - 20” 1” 324” - 36” 11⁄2” 3

42” 2” 448” 2” 4

54” - 60” 21⁄2” 472” - up 3” 4

Tank Number Diameter Angle Size of Legs

24” - 30” 11⁄2” x 11⁄2” x 3⁄16” 3

36” 2” x 2” x 1⁄4” 342” - 48” 3” x 3” x 1⁄4” 454” - 60” 3” x 3” x 1⁄4” 466” - up 4” x 4”x 1⁄4” 4

24” through 36”R1 = Tank radius (1/2 diameter)

42” through 96”R2 = Tank radius (1/2 diameter)

Most popular type of vertical sup-port—Allows installer to level to fitfloor by adjusting pipe nipples.

Tanks can be furnished with threeor four angle legs.

Normally used with air receivers—not recommended for watertanks as external corrosion canoccur in ring.

Note:Outside diameter of ring is 6” less thandiameter of tank.

Saddles

Supports for Pipe Legs

Angle Legs

Ring Base

A

A

R1

R2

Pipe Nipples

Coupling

Nipple

Floor Flange

OD

4" x 6"Cut Outs

Note:Normally two saddles are used ontanks up to 16’ length.Three saddles over 16’ tank length.

6

Cemline® Tank Supports

Cemline offers a variety of supports for both horizontal and vertical tanks.Standard supports are shown below.

Horizontal Steel Tank

Vertical Non-pressurized Tank

7

Openings in Tanks

Vertical Submittal Horizontal Submittal

Threaded OpeningsNPT (National Pipe Thread) open-ings are available from 1/4”through 3”. Normally openingsabove this size are flanged.

Flanged OpeningsFlanged openings are availablefrom 1” through 24”. NormallyANSI Standard flanges are 150#rating. Flanged openings of otherstyles and pressures are available.

Manholes and HandholesManholes are furnished in the following sizes:

12” x 16” 14” x 18”Handholes are furnished in thefollowing sizes:

4” x 6” 6” x 8”

Internal PipesInternal pipes and perforatedpipes in all sizes can be furnished.

ThreadedCoupling

Vessel Wall

RingCoverBolts

Yoke

Holes Pipe Closed End

Groove-End ConnectionsGroove- end connections are furnished as required. 6” andbelow are schedule 40 pipe, 8”and above are schedule 30 pipe.

Groove-EndConnection

Vessel Wall

Sales OfficesSales Offices

Catalog Brochures Available• STONESTEEL® Water Storage Tanks• STONESTEEL® Jacketed Storage Tanks• Submerged Heating Coils• Replacement Tube Bundles• Steel Tanks• STONESTEEL® Commercial Electric Water Heaters• Electric Boilers• STONESTEEL® Packaged Copper Coil Water Heaters• STONESTEEL® Compact Packaged Copper

Coil Water Heaters• Stainless Compact Packaged Copper Coil Water

Heaters• Unfired Steam Generators• Condensed Catalog

Cemline is represented in all major cities.Please contact your local representative or call Cemline Corporation.

Other Sales Offices:AlaskaHawaiiPuerto RicoTaiwan

®

STONESTEEL is a Registered Trademark of Cemline Corporation

©2009 Cemline Corporation All Rights Reserved.

All trademarks on this brochure are the property of CemlineCorporation, unless otherwise noted or in any other way set forth as athird party rights. Unauthorized use of these trademarks, as well as thematerials presented on this site, is expressly prohibited and constitutesa violation of the intellectual property rights of Cemline Corporation.

CEMLINE CORPORATIONP.O. BOX 55 CHESWICK, PENNSYLVANIA 15024PHONE: (724) 274-5430 FAX (724) 274-5448

www.cemline.com

www.cemline.com• Graphical Interfaces• Informational Sections• Agent Locator• Plant Tour• Sizing programs

for all products

CBO Series

Cemline Centrifugal Boiler Blow OffCondensate Cooler

CBO Series


www.cemline.com

NOW AVAILABLE

Automated CD-Rom

Sizing Program

The dimensions shown are adequate for most applications. Other vessel sizes orchange in opening sizes are available. Consult factory or local representative.

2

CBO Series

CheckValve

E

F

H

D

ColdwaterInlet

ControlValve

BTangential

InletWearPlate

AVent

SensingBulb

C

Thermometer

To Drain

L

3 - Steel Angle Legs

G

12" 24" 24" 2-1/2" 1/2" 2-1/2" 1/2" 40" 6" N.P.T. M.N.P.T. M.N.P.T. N.P.T. 12" 24" 24" 3" 1/2" 2-1/2" 1/2" 40" 6" N.P.T. M.N.P.T. M.N.P.T. N.P.T. 16" 26" 24" 2-1/2" 3/4" 2-1/2" 1/2" 42" 6" N.P.T. M.N.P.T. M.N.P.T. N.P.T. 16" 26" 26" 3" 3/4" 3" 1/2" 42" 8" N.P.T. M.N.P.T. M.N.P.T. N.P.T. 16" 26" 26" 4"-150# 1" 3" 1/2" 44" 8" FLANGE M.N.P.T. M.N.P.T. N.P.T. 16" 26" 28" 6"-150# 1-1/4" 4" 3/4" 46" 8" FLANGE M.N.P.T. M.N.P.T. N.P.T. 16" 26" 28" 6"-150# 1-1/2" 4" 3/4" 45" 8" FLANGE M.N.P.T. M.N.P.T. N.P.T. 16" 26" 28" 6"-150# 2" 4" 3/4" 45" 8" FLANGE M.N.P.T. M.N.P.T. N.P.T. 24" 48" 30" 8"-150# 2" 6" 1" 67" 9" FLANGE M.N.P.T. PIPE N.P.T. 24" 48" 30" 8"-150# 2-1/2" 6" 1" 67" 10" FLANGE M.N.P.T. PIPE N.P.T.

CBO-1

CBO-2

LDA

VENTHC

DRAINB

BLOWOFF EG

COLDWATERMODEL NUMBER F

CBO-3

CBO-4

CBO-5

CBO-6

CBO-7

CBO-8

CBO-9

CBO-10

Cemline Centrifugal Boiler Blow Off/Condensate CoolerDimensions

Cemline Blowdown / CondensateCoolers are designed to receiveblowdown from a steam boiler,flash the blowdown to steam,and cool the condensate goingto drain.

Standard FeaturesASME Code Constructed andNational Board Registered Vessel

• Tangential Inlet • 316 stainless steel wear plate• Vent • Drain

Condensate Cool Leg Assembly*

• Check Valve • Control Valve • Thermometer

*Note: On CBO Models 1 through 5 the coolingleg is threaded into the bottom of the vessel. OnCBO Models 5 through 10 the cooling leg isattached to the tank by a flange connection.

Cemline CBO boiler blow off condensate coolers are normally sized basedupon the size of the blow off line from the boiler to the blow off tank. Below isthe flow rate of blow off and total flow rate to achieve a 140° water tempera-ture to the sewer.

3

Cemline CBOSizing

The above information is based upon flashing blowdown to 212°(100°C) cooling water is assumed at 50°F.

To calculate amount of cooling water flow, subtract blowdown GPMfrom total GPM. Where two sizes are shown, select smaller size forboiler operating at 150 PSI or less, larger sizes for boiler operating at151 PSI or more.

0% 3 5 4 7 6 10 10 17

2% 4 7 4 7 7 12 12 21

3% 4 7 5 9 8 14 15 26

4% 4 7 6 10 10 17 17 29

6% 5 9 8 14 13 22 22 38

9% 7 12 13 22 20 34 34 58

11% 10 17 17 29 27 46 46 79

13% 10 17 18 31 28 48 47 81

16% 11 19 20 34 33 57 59 101

0

5

10

15

25

50

75

100

150

STEAMPRESSURE

PSI

1/2" BLOWDOWNCBO-1CBO-2

3/4" BLOWDOWNCBO-3CBO-4

%FLASH

BLOWDOWNGPM

TOTALFLOWGPM

BLOWDOWNGPM

TOTALFLOWGPM

1" BLOWDOWNCBO-5

BLOWDOWNGPM

TOTALFLOWGPM

1" BLOWDOWNCBO-6

BLOWDOWNGPM

TOTALFLOWGPM

0% 15 26 24 41 38 65

2% 17 29 28 48 44 76

3% 20 34 32 55 48 83

4% 23 40 38 65 55 95

6% 30 52 50 86 70 120

9% 47 81 77 132 109 187

11% 62 107 103 177 148 255

13% 68 117 115 198 172 296

16% 82 141 137 236 197 339

0

5

10

15

25

50

75

100

150

STEAMPRESSURE

PSI

1 1/2" BLOWDOWNCBO-7

2" BLOWDOWNCBO-8CBO-9

%FLASH

BLOWDOWNGPM

TOTALFLOWGPM

BLOWDOWNGPM

TOTALFLOWGPM

2 1/2" BLOWDOWNCBO-10

BLOWDOWNGPM

TOTALFLOWGPM

Cemline CD-ROM / Website• Graphical Interfaces• Informational Sections• Agent Locator• Plant Tour• Sizing programs

for all products


www.cemline.com

Cemline Blowdown/ Condensate Coolers are ASME code constructedand stamped for 150 PSI working pressure. Minimum steel thickness is3/16”. Where conditions require these vessels can be constructed with1/4”, 3/8”, or 1/2” steel thickness.

The blowdown enters the tangential inlet where it meets a 90 degreestainless steel wear plate. The wear plate will prevent erosion of theside wall of the vessel. The tangential blowdown entry causes theblowdown to swirl around the circumference of the vessel wherepart of the liquid will flash to steam and the balance will settle to thebottom of the vessel.

The internal flash will go through the vent to atmosphere and thehot condensate and sludge will fall to the bottom of the vesselwhere it will activate the thermal control valve which will feed coldwater into the drain leg where the cold water and hot condensatewill mix. This results in drained liquid temperature which is acceptable formunicipal sewage.

The blowdown vessel can be provided without the condensatecooling leg.

Cemline Blowdown / Condensate Coolers are designed to receive blowdownfrom a steam boiler, flash the blowdown to steam, and cool the condensategoing to drain.

Construction of CBO SeriesSpecifications

Specification

Centrifugal boiler blow off tank shall be model as manufactured by Cemline Corporation. Tank shall be ASME Codeconstructed and stamped for 150 psi working pressure and shall beregistered with The National Board of Boiler and Pressure VesselInspectors. Vessel shall be furnished with a tangential inlet and a 90degree 1/8” minimum thickness type 316 stainless steel wear plate.Vessel shall have vent opening and inspection openings as required bythe ASME Code. Tank shall have a blacksteel interior with a red oxideprime exterior. Vessel shall be mounted on angle legs and shall be factory supplied with an integral adjustable water cooling controlvalve, check valve, and thermometer built into a factory fabricateddrain leg which shall cool the condensate.


All trademarks on this brochure are the property of Cemline Corporation, unless otherwisenoted or in any other way set forth as a third party rights. Unauthorized use of these trade-marks, as well as the materials presented on this site, is expressly prohibited and constitutesa violation of the intellectual property rights of Cemline Corporation.

L D

I

A

O

V

Drain and Outlet

Hand Hole(Optional)

OpenEnd

InternalDrop Leg

(Optional)

CondensateInlet

InternalSparging Pipe

(Optional)

FST Series

Horizontal SpecificationFlash tank shall be manufactured byCemline Corporation and shall bemodel _________. Flash tank shall beASME Code constructed andstamped for 150# working pressure.Flash tank shall be registered with TheNational Board of Boiler and PressureVessel Inspectors. Interior of flash tank

FST Series

Cemline Flash Tanks Cemline Flash Tanks are used to flash steam from high temperature condensateprior to introducing into low-pressure lines and to flash condensate prior toreturning to the boiler of the condensate tank.

Cemline offers flash tanks in bothhorizontal and vertical configuration.Horizontal flash tanks are based onflashing from the surface of a pool ofwater. The surface flashing requires alarger tank. Vertical flash tanks use acyclone effect to separate the flashfrom the condensate. These flashtanks require a smaller tank.

Horizontal Flash Tanks:Cemline flash tanks are ASME codeconstructed and stamped for 150 PSIworking pressure of carbon steel andhave a prime painted exterior. Vesselsare registered with the national boardand will meet state codes.

Options1. Sparge tubes are sometimesfurnished but not necessary. Spargetubes diffuse condensate entering theflash tank. Sparge tubes have 1/4”holes at 0-90-180, and 270 degrees,

equal in total cross sectional area tothe cross sectional area of the pipe.Sparge tubes are either 1 1/2” or 2”IPS. Larger sparge tubes are available.2. Internal drop leg outlet. Internaldrop leg will allow condensate todrain from the bottom and coolestpart of the vessel.3. 4” x 6” Handhole. Handhole allowsfor internal inspection and cleaning.

shall be blacksteel. Exterior shall becoated with one coat shop primer.Flash tank shall be piped as shown ondrawing.

Options• Flash tank shall be furnished withinternal spray pipe with 1/4” holes

drilled at 0-90-180, and 270 degrees.Total cross section area of holes shallbe equal to or greater than crosssection of condensation pipe.

• Tank shall have 4”x 6” handhole.

• Tank shall have internal elbow and down pipe.

Model Number

CapacityGallons

DDiameter

IInlet

VVent

ADrain

OOutlet

H13FSTH18FSTH24FSTH30FSTH48FSTH80FSTH125FSTH180FSTH240FST

131824304880

125180240

10.75"12"14"16"18"24"30"36"42"

1.5"1.5"1.5"1.5"

2"2"2"2"2"

2"2"2"

2.5"2.5"

3"3"3"3"

1"1"1"

1.5"1.5"

2"2"3"3"

1.5"1.5"1.5"1.5"1.5"

2"2"2"2"

LLength

39"39"39"38"48"48"48"48"48"

SizingAvailable

on CD-ROM


www.cemline.com

FST SeriesFST Series

Cemline Flash TanksCemline flash tanks are used to flash steam from high temperature condensateprior to introducing into low-pressure lines and to flash condensate prior toreturning to the boiler of the condensate tank.

Cemline offers flash tanks in bothhorizontal and vertical configuration.Horizontal flash tanks are based onflashing from the surface of a pool ofwater. The surface flashing requires alarger tank. Vertical flash tanks use acyclone effect to separate the flashfrom the condensate. These flashtanks require a smaller tank.

Vertical Flash Tank

Vertical Flash TanksVertical flash tanks use a cycloneeffect to separate the flash from thecondensate. These flash tanks requirea smaller tank.

Cemline flash tanks are ASME codeconstructed and stamped for 150 PSIworking pressure of carbon steel andhave a prime painted exterior.Vessels are registered with the nationalboard and will meet state codes.

Vertical SpecificationFlash tank shall be manufactured byCemline Corporation and shall bemodel ________. Flash tank shall beASME Code constructed andstamped for 150# working pressure.Flash tank shall have 150# RF flanges.Flash tank shall be registered with TheNational Board of Boiler and PressureVessel Inspectors. Interior of flash tankshall be blacksteel. Exterior shall becoated with one coat shop primer.Flash tank shall be piped as shown ondrawing.

4/01

Model Number

DDiameter

LLength

IInlet(FLG)

OOutlet(NPT)

HHeight

BDistance to

InletV4FSTV8FSTV20FSTV40FSTV62FST

6 5/8"8 5/8"

12 3/4"16"20"

36"36"42"48"48"

2"3"4"6"8"

1.5"1.5"

2"2"2"

50"50"56"62"62"

26"26"32"38"38"

VVent(FLG)2.5"4"6"6"8"

1.5"1.5"

2"2"

2.5"

EOpening

(NPT)

D

O

B

E

H L

V

V

1/2" NPT

I

10"

4"

14"

SizingAvailable

on CD-ROM

BOT Series

Cemline Blow Off Tank

BOT Series


www.cemline.com

Blow down tanks are manufactured in accordance with the ASME Code,Section VIII for MAWP of 125 psi. Tanks constructed for greater workingpressures are available.

H

D

TemperatureControl Valve(Optional)

CondensateOutlet

WaterLevel

VVent

SensingBulb

FTo Drain

L

D

SiphonBreaker

OpenEnd

TangentalBlow Off

Inlet

GaugeGlass

(Optional)

Cold Water Inlet(Optional)

C

B

90° Wear Plate

3 - Steel Angle Legswith Base Plates

Manhole(Optional

Up To42” Dia.)

30 16" 36" 12" 2-1/2" NPT 3/4" NPT 2" NPT 1-1/2" 50 20" 42" 12" 2-1/2" NPT 3/4" NPT 2" NPT 1-1/2" 87 24" 48" 12" 3" NPT 1" NPT 2" NPT 1-1/2" 140 30" 48" 12" 3" NPT 1-1/4" NPT 2" NPT 1-1/2" 215 36" 54" 12" 5" FLG. 1-1/2" NPT 2-1/2" NPT 2" NPT 320 42" 60" 12" 5" FLG. 2" 3" NPT 2" NPT 455 48" 66" 12" 6" FLG. 2-1/2" 4" FLG. 2" NPT 620 54" 72" 12" 8" FLG. 3" 5" FLG. 2" NPT 815 60" 78" 12" 10" FLG. 4" 6" FLG. 2" NPT

V30BOTV50BOTV87BOTV140BOTV215BOTV320BOTV455BOTV620BOTV815BOT

DCapacityGallons HL

Blow OffB

VentV

Drain F

OutletC

Model Number

Cold Water D

1/2" NPT1/2" NPT1/2" NPT3/4" NPT3/4" NPT3/4" NPT1" NPT1" NPT1" NPT


www.cemline.com

Cemline Blow Off TankCemline Blow Off Tank

Specification

Blow Off tank shall be model as manufactured byCemline and shall be ASME Code constructed and stamped for 125 psiworking pressure and shall be registered with the National Board of Boilerand Pressure Vessel Inspectors. Blow off tank shall have tangential blowoff inlet and minimum 3/8” thick 90 Degree wear plate, internal elbowand pipe to drain water from the bottom of the tank. Internal pipe shallhave syphon breaker.Vessel shall be furnished with angle iron legs withbase plates. Vessels 42” in diameter and larger shall be furnished with12” x 16” manhole.Vessel shall have openings for gauge glass, coolingwater inlet, sensing bulb, and drain.



The Blow Down tank is furnished with a tangential blow off inlet with a90° steel wear plate. As the blow off liquid enters the vessel it flashes tosteam. The flash steam goes through the vent to atmosphere. The con-densate falls to the bottom of the vessel where it accumulates. Whenthe water level in the vessel gets to the height of the condensate out-let, it flows to drain. As the water is draining from the bottom of the ves-sel, in many cases the condensate going to the drain will be below themaximum allowable temperature for water entering a municipalsewer. Cemline can furnish the boiler blow off tank with a temperaturecontrol valve which will introduce cold city water into the blow off ves-sel to maintain proper drain temperature.

Blow Down tanks are constructed in accordance with The NationalBoard Rules and Recommendations for the Design of a Boiler Blow OffSystem. This pamphlet is available from The National board of Boilerand Pressure Vessel Inspectors in Columbus, Ohio. In sizing a blow downtank, the blow down vessel should be of a volume equal to at leasttwice the volume of one blow down when the water level in the boileris reduced by not less than 4”.

Blow Off tanks are vessels used as holding tanks to reduce the pressureand temperature of water drained from boilers and to ensure the saferelease of boiler drain water into the sewage system.

SEB Series

Cemline primary/secondarybuffer tanks improve systemefficiency by preventing theproblem of short cyclingboiler(s).Low water content boilers operating at lowloads will short cycle leading to sooting,premature component failure, and nui-sance shut downs. If the boiler is allowed tofire for a minimum of several minutes the fullefficiency of the boiler can be achievedpreventing sooting, premature componentfailure, and nuisance shut downs.

Boiler systems are sized to heat thebuilding on the coldest days. When theoutside temperature is above minimumoutside design conditions the boiler mayonly require a short period of firing towarm the building causing short cyclingof the boiler. Installing a Primary/Secondarybuffer tank prevents this short cycling.Many boiler manufactures do notrecommend firing the boiler(s) more than6 cycles per hour.

Cemline primary/secondarybuffer tanks remove air fromthe heating system, thuseliminating a separate airseparator.Boiler systems require a low velocity areain the system to allow entrained air to beseparated from the boiler water. APrimary/ Secondary Buffer tank will haveextremely low velocity and is used as theair separator, thus eliminating the need fora separate air separator.

System Efficiency Buffer Tank Cemline Primary/Secondary Buffer Tank, Air Separator

SEB Series

1 2

• Improves Efficiency of the Heating System• Eliminates the Need for an Air Separator• Primary/Secondary Hydraulic Separator

Cemline primary/secondarybuffer tanks act as a hydraulicseparator by separating theprimary and secondary sidesof the boiler system.The primary/secondary hydraulicseparator allows for variable volumesystems to operate with the modernboiler as instructed in ASHRAE 90.1.

Cemline Primary/Secondary buffer tankscome complete with insulated jackets[R-12.5] with Velcro closures for simplefield installation.

Cemline Primary/Secondary buffer tankshave a well to accept Building automationsystem or customer supplied temperaturesensors. As an option a factory supplieddigital electronic thermostat can be sup-plied to cycle the boilers on call for heat.This digital electronic thermostat has a LCDtemperature display and can be easily fieldprogrammed for a minimum of 2°F andmaximum of 30°F temperature differences.

The boiler(s) will have a pump to pro-vide constant flow rate between thePrimary/Secondary buffer tank andthe boiler. The top of the Primary/Secondary buffer tank is domed andan automatic air vent is installed inthe top of the crown of the dome.There is a secondary building systempump, which circulates hot water

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from the Primary/Secondary buffertank to the system and returns thesystem water to the Primary/Secondary buffer tank. Typically themaximum tank temperature is 180°F.A digital thermostat can be pro-grammed to allow the Primary/Secondary buffer tank temperatureto drop 5 to 10 degrees before

calling for the primary boiler pump tostart and for boiler(s) to fire. Whenthe temperature of the Primary/Secondary buffer tank temperaturereaches 180°F the boiler stops firingand the primary boiler pump stops.The secondary pump continues torun to provide heating water to thebuilding.

• Improves efficiency of the Heating System

• Eliminates the need for an Air Separator

• Primary/Secondary Hydraulic Separator

• ASME Pressure Vessel – rated 125 psig @ 400°F built to ASME Section VIII, Division I

• Air Vent – Reduces air accumulation in the system.

• Insulated Jacket – Foam R-12.5 field installed insulation with removable jacket

• Thermometer – Temperature in the buffer tank displayed

• Digital Electronic Field Programmable Thermostat

• Extra openings• Inlet/Outlet Diverting Baffle(s)• Stainless steel vessel

Product Benefits Standard Equipment Optional Equipment

How to Calculate Required SEB Tank

System Type 1: System Flow equals Boiler Flow. (No Buffer Tank Required).The distri-bution flow and the boiler flow are equal. This is the least common occurrence.

Step 1: Determine the flow systemcharacteristics.Primary/secondary systems can havevarying flow characteristics depend-ing on how the system is designedand how it operates.

System Type 2: System Flow greater than Boiler Flow. (No Buffer Tank Required).The system flow is greater than the boiler flow. The greater system flow createsa situation where the temperature to the system piping is blended and lessthan the temperature from the boiler.

System Type 3: System Flow less than Boiler Flow. (Buffer Tank Required).The system flow is less than the boiler flow. The greater boiler flow creates a situ-ation where the temperature returning to the boiler is greater than the coldwater returning from the system piping.

Operation of the Primary/Secondary Buffer Tanks

Boiler Flow = System Flow

Boiler Flow < System Flow

Boiler Flow > System Flow

T2, F2

T3, F3

T1, F1

T4, F4

Boiler Flow System Flow

T2, F2

T3, F3

T1, F1

T4, F4


T2, F2

T3, F3


T1, F1

T4, F4

How to Calculate Required SEB Tank (continued)Automated sizing can be found on-line at www.cemline.com. Please visit www.cemline.com to size and print outspecification and drawing of the unit required.

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Step 2: What is the BTU/hr of the boiler?

Step 4: What is the minimum rate of heat extraction from the tank in BTU/Hr.

Q Load†

†Assume to be 0 if no load on the system or if the rate is unknown.

Step 5: Enter the temperature dropwithin the tank.

Q Boiler (BTU/H)

Step 6: Enter the cycle time the boiler should run.

T (Minutes) (Range: 1—5 minutes)**Check with boiler manufacturer for recommended minimum run time.

Step 7: Calculate the minimum buffertank size required.

∆T (°F) (Typically, 10 °F, Range 5 to 25 °F)

V (Gallons ) = T x (Q mBoiler - Q Load )

∆T x 500††500 = 8.33#/gal x 60 min/hr

Step 1: System flow is less than boiler flow.

Step 2: What is the BTU/hr of the boiler? 1,000,000 BTU/hr

Step 3: Calculate the minimum boiler output in BTU/Hr.The boiler has a minimum firing rate of 25%.1,000,000 BTU/hr x 25% = 250,000 BTU/hr

Step 4: What is the minimum rate of heat extraction from the tank?0 BTU/hr

Step 5: Temperature drop in the tank.∆T = 10 °F

Step 6: Cycle time on.T = 2 minutes

Step 7: Minimum buffer tank volume required (V).

V (Gallons) = T x (Q mBoiler - Q Load)(∆T x 500)

V = 2 x (250,000 - 0)(10 x 500)

V = 100 gallons

Therefore, choose a V120SEB.

Example: Buffer Tank Sizing

Step 3: What is the minimum boiler output in BTU/hr?

Q mBoiler = Q Boiler x Minimum Firing RateBoiler Minimum Firing Rate between 20-80%*

*Check with boiler manufacturer for recommended minimum firing rate.


Boiler Flow > System Flow

CEMLINE CORPORATIONP.O. BOX 55 CHESWICK, PENNSYLVANIA 15024PHONE: (724) 274-5430 FAX (724) 274-5448

www.cemline.com



Model Number

CapacityGallons D A B C

V60SEBV120SEBV200SEBV300SEBV500SEB

60120200300500

18"24"30"36"42"

3/4 Vent"3/4 Vent"3/4 Vent"3/4 Vent"3/4 Vent"

2" NPT2 1/2" NPT

3"-150# FLG4"-150# FLG6"-150# FLG

10"12"14"16"18"

L61"60"72"72"90"

E10"12"14"16"24"

H64 1/8"63 1/8"75 1/8"75 1/8"93 1/8"

W24 1/4"30 1/4"36 1/4"42 1/4"48 1/4"

12" x 16" Manhole

on V500SEB

WApproximate

Thermometer

L

H

36”

C

E

C

D

1 1/2” NPT Drain

3 - Leg Stands

A

B

B

B B

SEB SeriesSEB SeriesSystem Efficiency Buffer Tank

Submittal Drawing

Cemline Steel TanksCemline steel tanks are provided with 12”x 16”elliptical manholes on...

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Transcript of Cemline Steel TanksCemline steel tanks are provided with 12”x 16”elliptical manholes on...