P lug V alves. Conical - La Empresa - VCF, S.A ...€¦ · Ball Valves Plug Valves GALLI&CASSINA P...

Conical

GALLI&CASSINAPlug Valves

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Plug Valves.

Round Port

PlugPressure BalancedTypeThe PressureBalanced PlugContains 2 Holes:• The Upper Holes Connects

the Plug Port with the Area Above Plug.

• The Lower hole Maintains Pressure Equalization Between the Plug Port and the Area Below the Plug.

This Prevents the Plug fromSeizing against the Body andPermits Predictable TurningTorque.

UPPER HOLE

LOWER HOLE


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Plug Valves.

Available StylesRectangular Port

“Port Opening”Is approximately Equal to theinside diameter of anEquivalent size schedule 80pipe.

• Venturi Pattern 40% - 50%• Regular Pattern 60% - 70%


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Plug Valves.

Plug Pressure Balanced TypeWEATHERSEAL

GRAPHITEPACKING FIRESEAL

BLOWOUT PROOF STEM

PRESSURE BALANCEDHOLE-WITH CHECK VALVE

LUBRICATION CHAMBER

LUBRICATION GROOVE

PRESSURE BALANCED HOLE

PLUG SEALANT INJECTOR

STEM SEALING INJECTOR

PLUG

PLUG LOADING SCREW

Rectangular Port


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Plug Valves.

Plug Pressure Balanced Type

Full Bore 100% Round Port

The PressureBalanced PlugContains 2 Holes:• The Upper Holes Connects

the Plug Port with the Area Above Plug.

• The Lower hole Maintains Pressure Equalization Between the Plug Port and the Area Below the Plug.

The “Full Bore” port area equalto the adjacent pipe area, preserves the fluid velocity ofthe pipeline and minimizes theabrasive effects of the fluid onthe plug port area.

UPPER HOLE

LOWER HOLE


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Plug Valves.

Round Port

STEM STEM PACKING INJECTOR

LUBRICANT INJECTORGRAPHITE

PACKING RING

O-RINGS

OLDHAM COUPLER

BODY

COVER

PRESSURE BALANCEHOLE

PLUG

METALDIAPHRAGMS

LOADING SCREW CAP

LOWER THRUSTWASHER

PLUGLOADING SCREW


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Plug Valves.



Round Port


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Plug Valves.

From Rectangular to Round Port


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Plug Valves.

Design DifferencesInnovation / Development

Advantages of Taper ShapePlug against Ball Valves

Comparison Between Plug Valves and Ball Valves

When valve seats (soft/metal) havebeen damaged, the emergency sealant injection benefits is effectivefor a short time due to the small sealing area.

If the valve is cycled, a new sealant injection is required.Lubricant can be injected to achievea long term “zero leakage” performance.Valves can be cycled easily withoutany performance reduction.


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Plug Valves.

Design

Bubbletight Sealing

Ball Valves Plug Valves

Being a line contact the seatingarea of a Ball Valve, the sealing capability is soon damaged if thefluid is not very clean.

Being the seat area the completetapered surfaces of plug and body, only heavy damage can causea reduction of valve sealing.


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Plug Valves.

High Pressure EffectsBall Valves Plug Valves

Non-metallic seating componentscan easily cause a sealing capabiltyfailure when subjected to a longburn time.

Due to the absence of non-metallicseat components, to the metallicbody-cover gasket and to the graphite stem gaskets, plug valveshave always shown a very high resistance to fire. Once the lubricant is burnt, the plug is still in close contact with the body to guarantee a good sealing result.

Sealing is not affected by line pressure: it depends only on springbehind seats.Ball valves can’t usually be opened against high differentialpressure in order to preserveseats integrity.

Due to the Pressure BalancedSystem, the inline pressure:• pushes the plug against body

seat,increasing the sealing performance;

• keeps the plug “pressurebalanced”, reducing the torquevalues.

Plug valves are designed and manufactured in order to withstandthe maximun differential pressuretorque without any problem.

Fire Safe Suitability

Ball Valves Plug Valves


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Plug Valves.

Deposit of SolidsFloating seats can be packed and damaged by solids.

No body cavity in contact with seating surfaces: edge of body/plugbore works as cutter cleaning themating surfaces from every depositof solids.

Surface finish of ball is critical andseats are protected except duringoperation.

No critical surfaces are directly incontact with fluid.

They cannot be-entirely maintained from the outside.Injection of sealant will not restore a long sealing period, shutdownrequired.

All standard and most of the non-routine maintenance operations, including seat adjustment, can be carried out with valves under full pressure. No shutdown required.

Corrosion & Erosion

Reliability

Applicable Standard-Specification


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Plug Valves.

API 6A Specification forwellhead and christmastre eequipment.

API 6D Specification forPipeline Valves.

API 6FA Specification for FireTest for Valves.

API RP6F Recommended -Practice for Fire Test for Valves.

API 598 Valve Inspection andTesting.

API 599 Steel Plug ValvesFlanged or Butt Welding Ends.

ASME/ANSI B 16.5 Pipe Flanges and Flanged Fittings.

ASME/ANSI B 16.10 Face-to-Face andEnd-to- End Dimensions ofValves.

ASME/ANSI B 16.25 Buttwelding Ends.

ASME/ANSI Valves-Flanged,B 16.34 threated and Welding

Ends.

ASME/ANSI B 31.3 Chemical Plant and Petroleum RefineryPiping.

ASME/ANSI B 31.4 Liquid TrasportationSystem for LiquidPetroleum Gas.

ASME/ANSI B 31.8 Gas Transmission and Distribution PipingSystem.

ASME Boiler and PressureVessel SECTION VIII -DIV.1 & 2

ASME Boiler and PressureVessel Section V.

ASNT-TC-1A ReccommendedPractice for PersonnelQualification andCertification in Non destructive Testing.

Applicable Standard-Specification


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Plug Valves.

BS 1504 Specification for Steel Casting for Pressure Purposes.

BS 2080 Face to Face - Centre to Face- End to End - Steell Valves.

BS 5353 Specification for Steel Plug Valves.

BS 6755 part 1 Testing of Valves (Spec. for Production Pressure Testing Requirements).

BS 6755 part 2 Testing of valves (Spec. for FireSafeTesting Requirements).

CSA Z 245. 15 Canadian StandardAssociation.

MSS-SP6 Standard Finish for contact Face of Pipe Flanges.

MSS-SP25 Standard Marking System for Valves.

MSS-SP44 Steel Pipe Line Flanges.

MSS-SP53 Quality Standard for Steel Casting-Magnetic Particle Examination Method.

MSS-SP54 Quality Standard for Steel CastingRadiographicExamination Method.

MSS-SP55 Quality Standard for Steel Casting Visual Method.

MSS-SP61 Pressure Testing of Steel Valves.

NACE Std. MR 01.75 National Association ofLatest EditionCorrosion Engineers.

ASTM American Society for Testing and Materials.

1 Standard Carbon Steel Body and Plug. (ASTM-A216 WCB/WCC material) suitable for general services.

2 Carbon Steel Body and Plug (A352 LCB/LCC material) suitable for low temperature services.

3 Carbon Steel Body and Plug (ASTM A216WCB/WCC material) suitable for “SOUR SERVICE”(H2S and CO2) according to NACE-MR.01.75/Latest Edition.

44 Special Austenitic (6MO) and Ferritic-Austenitic Stainless Steel (Duplex and Superduplex) suitable for sea water and corrosive services.

5 Nickel-Chromium-Iron alloy (i.e. Alloy 20), Titanium & Titanium alloy, carbon steel with Inconel 625 cladding and stellite or Tungsten carbide hardfacing for abrasive/corrosive service.

6 Other materials upon request.


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Plug Valves.

Trim materials are designed according to the serviceconditions.

Material Selection Guide

Fire Safe Test and Available Tests

All Galli & Cassina’s Plug Valves have been tested against fireresistence, according to API - 6FA and BS 6755 - Part 2 standards and witnessed by international third party.


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Plug Valves.

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X AND GAMMA RAYS

DYE PENETRANT

MAGNETIC - PARTICLES(Dry and wet)

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ANSI B16.34 - Annex-BASME VIII - Div.1 - MSS -SP 54ASTM E446 - E186 - E280

ASME V - art.6 and 24 -ASTM E142 100% ANSI B16.34 - Annex-DMSS-SP-93

ASME V - art.7 and 25ANSI B16.34 - Annex C -MSS - SP 53

PPeerrffoorrmmaannccee

100% all butt welding endsand body.

all butt welding ends

100% of all valves


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Plug Valves.

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ULTRASONIC

VISUAL AND DIMENSIONAL

HARDNESS

HYDROSTATIC ANDPNEUMATIC

OPERATION TORQUE

HIGH PRESSURE CLOSURE

POSITIVE MATERIALIDENTIFICATION

AApppplliiccaabbllee SSttaannddaarrddss

ASME V - art.4 and 23ASME VIII - Div.1 - ASTM -A388

MSS - SP 55ANSI B16.5 - B16.10API 6D - (Table 4.2)

NACE - MR.01.75 Latest Edition

API - 6D - API 598BS 6755 - Part.1 - MSS - SP 61

API - 6D

API - 598 - par. 4-5

ASTM A751

PPeerrffoorrmmaannccee

Upon customer request

100% of rough and finishedmachined componentsand assembled valves

100% of wetted components

100% of all valves



100% of pressure containing components


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Advanced DesignAdvanced Design

Advanced Design


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Three -dimensional CAD system and the Finite Element Modelling allow the optimization of every step of valve’s design.

• Raw Casting design (A)• FEM stress calculation

of the pressure containing parts (B)

• Final Assembly Design Check (C)

B C

A B C

Advanced DesignAdvanced Design

Standard Features: PTFE Antifriction Treatment


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Plug Valves.

The Antifriction treatment is basically carried out on the plug to obtain thefollowing advantages: • Low friction between plug and body.• Low torque. • Wear resistance.• Resistance to seizure.

Special Features:Coating & Overlay

HardfacingThe most common damages of valves are eitherdue to abrasion by solids inthe flow lines, or the exposure of main components to corrosionattack.

Galli&Cassina’s researchingand development in cooperation with specialized companies and laboratories,have been the developmentof special hardfacing andcorrosion resistant materials,which have achieved excellent results in Off-Shoreapplication.

Most of the main materialsused are as follows: Stellite-Duplex-6MOInconel 625-Nickel Alloy 686Ultimet-Alloy(UNSR31233)Tungsten Carbide.


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Plug Valves.

Special Features:Coating & Overlay


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Plug Valves.

Electroless NickelPlatingThe transport of wethydrocarbon gasescontaminated with hydrogensulphide, carbon dioxide orother similar fluidscontaining appreciable level

of sulphur, can create variouscorrosion problems to somecomponent in plug valves.These environments are notalways recognized underservice conditions, thereforein order to obtain a highquality corrosion resistant, allthe material for eachcomponent of the valves, areselected in accordance with the requirements ofNACE-Std. MR-01-75 LatestEdition.Moreover the use of anelectroless nickel plating onplug surface provides more

corrosion protection tohydrogen sulphide crack-resistant base metal.Standard ENP is inaccordance with ASTM B733Std with a minimun 0.003”(76 Microns) thickness,unless otherwise specified in the customer’s specification.

Typical Applications“Rectangular Port”Gas/Oil Pipelines

• By-Pass (Comp. Station) • Blow Down• Drain/Vent• Manifold


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Plug Valves.

Typical Applications“Round Port”

Gas/Oil Pipelines• Pig Launcher • Blow Down• Receiver • Hot TapRefinery• Catalytic Fluids • Slurries• High Temperature ServiceDrilling & Off-Shore• Flow Line • Shut Down

API-6A 5000-10000 psi• Slurries


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Plug Valves.


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Plug Valves.

Two Way Full Jacketed BodyStandard Type

Jacketed Tank Bottom Valves

Two Way Pressure Balanced Type

Two Way Pressure Balanced Typewith Stem Extension

Pressure Balanced API 6A

Two Way Standard Type

Multiport - Three - Four Way

The Production Range

Pressure Balanced Special Valves for Abrasive Service


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P lug V alves. Conical - La Empresa - VCF, S.A ...€¦ · Ball Valves Plug Valves GALLI&CASSINA P...

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