ANDERSON Liquid Storage - LNG, LPG, NH GREENWOOD · 2016-11-17 · NFPA No. 59A sets forth the National Fire Protection Association requirements for the design, engineering and handling

Anderson Greenwood Internal Tank ValvesLiquid Storage

Copyright © 2004 Tyco Flow Control. All rights reserved. ANGMC-0245-US-0406Total Flow Control Solutions™

ANDERSONGREENWOOD

Liquid Storage - LNG, LPG, NH3, LOX, etc.

FeaturesFail Safe Isolation - The Internal TankValve is a fail-safe isolation valve forbottom and side withdrawal tanks. It isalways in a position such that the weightof the disc will close the ITV when notbeing held open by the operator.

Self Seating Disc - The 4- through 18-inch [100 through 450 mm] pivot typeITV disc is free to pivot within theactuating arm and therefore sits freelyon the circular Teflon® seal. The 6-, 12-,24- and 30-inch [150, 300, 600, 750mm] plug type ITV maintains a constantgeometric relation between sphericaldisc face and conical seal. These designfeatures permit perfect seatingregardless of minor misalignments.

All SS Construction - All materials areproven fully compatible with cryogenictemperatures. To ensure weld andthermal compatibility in service, theorifice plate material is of the same typeas the tank bottom and is usuallycustomer furnished. Rotating joints haveone surface coated with Teflon®.

Net Force On Tank Bottom Is Down -The cable force produced by the openand close operators is intentionallylimited so that it can never exceed thetotal weight of the installed ITV. In thisway we assure that up-loads will notdamage the tank bottom.

Redundant Open Cable - Completelyredundant opening cables are providedso that the valve may be manuallyoperated should the need occur.

Pressure Equalizing Pilot Valve - Thefirst motion of the open operator opens apilot valve integral with the valve disc.Product flows through the pilot valve andfills pipe to the downstream block valve,equalizing the static differential pressureacross the ITV disc. The force limitedoperator will stop until pressuresequalize at which point the openingoperator will continue.

Anti-Vortex Vanes - A series of radiallypositioned flat plates are provided tocounter the Coriolis Effect and thusprevent lowered pressure and resultingproduct gasification during withdrawal.

Position Indication Switch Option -Anderson Greenwood can provideexplosion-proof limit switches (NEMAType 7, Class 1, Groups C and D)mounted on the open operator toindicate valve position (open or closed).

Auxiliary Close Cables - Close cablesare provided to augment normal sealingforces and to improve the manipulativeflexibility of the system.

Control Panel Option - AndersonGreenwood can provide all necessarycomponents for control of the ITV in asingle weather-tight enclosure designedfor roof installation and remoteoperation.

Flow Control Anderson Greenwood is either a trademark or registered trademark of Tyco International Services AG or itsaffiliates in the United States and/or other countries. All other brand names, product names, or trademarksbelong to their respective holders.


Copyright © 2004 Tyco Flow Control. All rights reserved. ANGMC-02452

CloseCables

Powered OpenCables

Manual OpenCable

ITV

Manual Handle

Open Operator Close Operator

Storage Tank

Relief Valve

NFPA No. 59A sets forth the NationalFire Protection Associationrequirements for the design,engineering and handling of LiquefiedNatural Gas. According to this code,when a tank has a bottom penetration inLNG storage containers, the leastamount of surrounding property isrequired if an internal shutoff valve isused.

The Anderson Greenwood Internal TankValve is designed to satisfy all of therequirements of NFPA No. 59A for thistype of installation, specifically,paragraph 6333:

“The design and installation of aninternal valve shall be such that anyfailure of the penetrating nozzleresulting from external pipe strain will bebeyond the shutoff seats of the internalvalve itself.”

The ITV is designed for long trouble-freelife. Design features are simple yetrugged to withstand the rigors ofconstruction. No maintenance of the ITVis required after installation.

When mounted on the tank bottom, thisvalve allows near 100% withdrawal ofliquid.

It does not depend upon counter-weights or actuator forces for closing.The fail-safe condition of the ITV isclosed.

A block valve is always to be provided inseries with this valve. The downstreamblock valve must be closed before theITV can be opened. This prevents theITV from being opened on an open orruptured downstream line.

Seal ruggedness and long life areevaluated as more important factorsthan absolute leak tightness. The sealmay be installed as a separate unit.

The use of this valve increases safety,minimizes property requirements, andshould lower insurance liability.

Typical installation of Internal Tank Valve, cables and operators.



1

3

4

7

7

6

5

8

92

Developed primarily for the LNGPeakshaving Facilities, AndersonGreenwood offers a pivot mountedcheck valve design in sizes 4-, 6-, 8-,10-,12-, 14-, 16- and 18-inch [100, 150, 200,250, 300, 350, 400 and 450 mm]. (The6- and 12-inch [150 and 300 mm] arealso offered in a plug valve design, seepage 5.) The pivot design may be usedfor any application where fill rates do notexceed 8,000 GPM [1800 m3/hr] (18-inch [450 mm] size). Maximum withdrawrates vary with size up to 17,000 gallonsper minute [3850 m3/hr].

Notes1. Teflon® is a registered trademark of E.I du

pont de Nemours Company.

2. Inconel® is a registered trademark ofInternational Nickel Company.

Standard MaterialsItem Part Name Materials

1 Orifice Plate Customer Specified

2 Disc A240-304 SS3 Seal TFE Teflon®

4 Seal Retainer A240-304 SS5 Lever A240-304 SS

6 Arm A240-347 SS7 Cables 316 SS MIL-C 5424

8 Pivot Bearing Vespel9 Pilot Valve Spring Inconel® 600 AMS 5687

All other parts 300 Series SS (Primarily 304)

Pivot Type Internal Tank Valve 4- thru 18-inch

Pivot Type Internal Tank Valve



6

8

3

4

7

5

2

1

For Base Load Liquefaction Facilitiesand Import/Receiving Terminals thatrequire high inflow velocities, AndersonGreenwood offers a plug valve design in24- and 30-inch [600 and 750 mm] sizesillustrated below. These valves aredesigned for normal inflow velocities of30 feet per second [9 m/sec] and willaccommodate ‘slugging’ velocities to 50feet per second [15 m/sec] withoutproducing a force on the tank bottom.Stream dynamic forces on the disc arecompletely reacted by the weight of thedisc plus the weight of the fixed valveparts. Product may be withdrawnthrough this valve at 48,000 GPM[10,900 m3/hr] maximum. This design isalso available in 6- and 12-inch [150 and300 mm] sizes for LOX, LIN and othersmaller scale liquefaction and storagefacilities. The 6-inch [150 mm] plug typeITV is also available in a gravity closeversion, eliminating close operators for amore economical solution.

Plug Type 6-, 12-, 24-, and 30-inch



2 Disc A182-F304 SS3 Seal TFE Teflon®

4 Seal Retainer A240-304 SS5 Shaft A479-304 SS

6 Straight Line Mech. 300 Series SST (Primarily 304)7 Cables 316 SS MIL-C 5424

8 Pilot Valve Spring Inconel® 600 AMS 5687All other parts 300 Series SS (Primarily 304)

Plug Type Internal Tank Valve



7

6

8

10

5

9

2

3

4

1

Developed for side withdrawal double-walled tanks, Anderson Greenwoodoffers a side mounted pivot check valvedesign in sizes 12-, 14-, 16- and 18-inch[300, 350, 400 and 450 mm]. The pivotdesign may be used for any applicationwhere fill rates do not exceed 8,000GPM [1800 m3/hr] (18-inch [450 mm]size). Maximum withdraw rates vary withsize up to 10,000 gallons per minute[2250 m3/hr].



2 Disc A240-304 SS3 Seal TFE Teflon®

4 Seal Retainer A240-304 SS5 Lever A240-304 SS

6 Arm A240-347 SS7 Cables 316 SS MIL-C 5424

8 Pivot Bearing Vespel9 Pilot Valve Spring Inconel® 600 AMS 5687

10 Flange (150#) Customer SuppliedAll other parts 300 Series SS (Primarily 304)

Side Mounted Pivot Type Internal Tank Valve 12- thru 18-inch

Side Mounted Plug TypeInternal Tank Valve



Operators

Operation of the ITV is by force limitedoperators mounted on the tank roof. Oneoperator is for opening and one forclosing the valve. As a backup to theprimary open operator, a completelyindependent manual cable is provided inthe 4-inch through 18-inch [100 through450 mm] ITVs. On the 6- and 12-inch[150 and 300 mm] plug designs, amanual close operator is provided toallow all operating functions to beenclosed in a single housing for easierinstallation for the much heavier 24- and30-inch [600 and 750 mm] ITV, aseparate operator housing with handoperated hydraulic pump is provided foremergency use. Stainless steel cablesfrom the operators to the valves areinstalled with enough cable slack toaccommodate maximum thermal andload changes of the tank top to tank

bottom dimension. Since proper cablelength is critical to the valve operation,cable length adjustment is providedinside each operator housing. Air orhydraulic cylinders provide thenecessary force to open or close thevalve with a maximum required supplypressure of 100 psig [6.9 barg]. The aircylinders are sized so that the system isinherently safe from overloading thebottom of the tank at operatingpressures. Anderson Greenwood Series80 Relief Valves on the supply lineprovide backup assurance for theseforce-limited operators. Limit switchesare available to indicate open and closeposition.

Schematic A shows the typical controlsrequired for operating the ITV forwithdrawal applications with limited fillingvelocities. Control components are

normally provided by the customer butAnderson Greenwood can providestandard control packages. Regulatedpressure is required for each operator. Athree-way solenoid valve providesremote actuation capability. Emergencyoperation after loss of air supply isprovided by a reserve air bottle.

For high velocity (30 FPS [9 m/sec]normal) fill applications with the 24- or30-inch ITV [600 or 750 mm],Schematic B shows an air/oil systemprovided by Anderson Greenwood thatfully opens the valve disc and thensuspends it so that the full disc weight isavailable to react against inflow dynamicforces. Control components furnished bythe customer are similar to Schematic A.

OpenCylinder

CableSystem

CableSystem

Close

Open

CloseCylinder

AG Type 83Relief Valves

Control Panel Enclosure

Optional Customer SuppliedVolume Bottle

Air Supply

Schematic A



OpenCylinder

CableSystem

CableSystem

Close

Open

CloseCylinder

AG Type 83Relief Valve

Optional CustomerSupplied VolumeBottle

AG Type 81PRelief Valve

AG Type 83Relief Valve

N.O.

N.C.

Control

Air

Air-OilTank

HydraulicFluid

PilotOperated2-wayN.O.

Trip55 psig

Set58psig

Set150psig

Set80psig

Set55psig

Set52-54psig

Set58psig

PressureSwitch N.C.

Trip 30 psig

Set50 psig

ManualCylinder

Set485psig

CableSystem

HydraulicHand Pump

AG Type 81PRelief Valve

Pilot Operated3-Way N.C.

Control Panel Enclosure

80-100 psigAir Supply

Schematic B



Tyco Flow Control (TFC) provides the information herein in good faith but makes no representation as to its comprehensiveness or accuracy. This data sheet is intended only as a guide to TFC products and services.Individuals using this data sheet must exercise their independent judgment in evaluating product selection and determining product appropriateness for their particular purpose and system requirements. TFC MAKES NOREPRESENTATIONS OR WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE WITHRESPECT TO THE INFORMATION SET FORTH HEREIN OR THE PRODUCT(S) TO WHICH THE INFORMATION REFERS. ACCORDINGLY, TFC WILL NOT BE RESPONSIBLE FOR DAMAGES (OF ANY KIND ORNATURE, INCLUDING INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES) RESULTING FROM THE USE OF OR RELIANCE UPON THIS INFORMATION. Patents and Patents Pending in the U.S. and foreign countries. Tyco reserves the right to change product designs and specifications without notice.

Tyco Valves & Controlswww.tycovalves.com

Phone: 281-274-4400

Documents

ANDERSON Liquid Storage - LNG, LPG, NH GREENWOOD · 2016-11-17 · NFPA No. 59A sets forth the National Fire Protection Association requirements for the design, engineering and handling