isotech® product overview -...

Isotech® Product Overview

2Isotech® Product Overview

©2015 ValvTechnologies, Inc. All rights reserved.

Product InformationThe Isotech® is a parallel slide gate, bidirectional valve designed for high pressure, high temperature steam and water shutoff applications, and used for valve isolation. It provides zero-leakage using out robotically integrated thermal spray coating process. In power applications, the Isotech® carries a four-year zero-leakage warranty.

Product DesignThe Isotech® is designed to B16.34, PED, ASME III and safety related nuclear standards and is available in sizes 6” to 36” with pressures of 600#, 900#, 1500#, 2500# and 4500# ANSI class cast body product. This product features chrome carbide overlay of the stem, guides, seats and discs. The positioned seating provides positive leak-tight performance without the need of torque.

Product CharacteristicsGeneral• Hardcoated HVOF RiTech™ seats up to Rc72• HVOF RiTech™ overlay of stems, discs and guides• Internal travel position stops - position seated• External position indicator• Live loaded, shallow stuffing box• Low break and run torques• Tee slot stem versus threaded hanger• Low coefficient of friction .2-.28• Improves heat rate• Easily actuated with up to 1/3rd the required

actuator size when compared to wedge gates• Six to 36”, ANSI/ASME class 600-4500• Cobalt free• Materials include WCB, WC6, WC9, SS

Pressure seal bonnet• HVOF RiTech™ coated HD stem with tee head• Four bolt minimum live-loaded packing• Cover plate• Draw studs & nuts• Oversized segment ring• Graphite bonnet gasket• Pressure seal bonnet with HVOF RiTech™

coating backseat

Body & integral seat• Guide rib

• HVOF RiTech™ coated• Parallel disc/seat alignment throughout

stroke• Integral seat

• HVOF RiTech™ coated & lapped• Zero-leakage• High cycle life• Protected from pipline flow

Disc design• Solid steel discs: A182-F420 (typical)• HVOF RiTech™ coated & lapped

• Low coefficient of friction .2-.28• Rc 70-72 hardness• Zero-leakage seal

• Through-conduit port: • Non-turbulent, high capacity Cv• Seating surfaces protected from the

flow• Disc spring: maintains high spring

load between disc & seat for zero-leakage seal

Disc alignment and sealing• Body guide rub

• HVOF RiTech™ coated• Maintains parallel disc/seat alignment

throughout stroke• Integral seat: HVOF RiTech™ coated• Through conduit port disc

• Non-turbulant, high Cv flow bore• Seating surfaces protected from flow

• Through conduit port disc• Non-turbulant, high Cv flow bore• Seating surfaces protected from flow

• Belleville spring• Maintains bi-directional tight contact

between disc & seat• High spring load for zero-leakage

• High cycle life: cycling of lapping HVOF RiTech™ surfaces hone & polish, not gall and scratch



Product Comparison

Isotech® Competitor E Competitor AM Competitor V Competitor C Competitor D

Type PSG Wedge Duo disk Parallel disc Parallel slide Parallel slide

Size 6 - 36” 6 - 36” 6 - 36” 6 - 36” 2 - 24” 5 - 24”

ANSI class 600 - 4500# 600 - 4500# 600 - 4500# 600 - 4500# 600 - 2500# 900 - 2500#

DiscsFloating/wedge driven

Floating/wedge driven Floating w/clips Floating w/clips Floating w/clips

Stem T-slot Threaded hanger Threaded hanger Pinned hanger Threaded hanger

Spring Belleville Coil Coil Coil

Coating HVOF RiTech™ Stellite Stellite Stellite

Seats Integral Welded Welded Welded Welded Welded

Repairability The Isotech®’s unique integrated metal-to-metal seat design, positioned out of the flow path, provides superior performance and product life to other gate valves on the market which are more susceptible to gailing and scratching. The majority of PSG valves, Isotech® included, are in-line repairable in larger diameters. Come competitors offer this in-line repairability through component replacement in large diameter PSG and gate valves while Isotech®’s unique integral seat design prevents the need for most repairs. However, Isotech® does offers in-line repairability in sizes 10” and above in rare cases of product damage.

Valve Specification Allowable leakage rates• Must exceed FCI 70-2 class V & VI and B16.34 1988; the leakage criteria to

be zero bubbles and drops over a three minute period on all test Stem• The stem should be a tee slot design, no threads to hanger, HVOF RiTech®

coated and polished Seats and guides• The seats and guides are integral to the valve body• HVOF RiTech™ ceramet overlay• Protected seats in the open position, the flow through-conduit positioned precisely

between the seats, eliminating turbulence and flow impingement on the seats Disc/gates• Tee slot configuration no threaded hanger, parallel in the range of travel,

fully open and in the closed position• HVOF RiTech™ ceramet overlay

Stem• Live-loaded design, four stud and six Belleville washer configuration



Isotech®Integral Seats, Four-Year Zero-Leakage Guarantee

Chrome carbide overlay of stem, discs and guides

Position seating

Internal travel position stops

External position indicator

Zero-leakage

Live loaded stuffing box

Reliable repeatable shut off

Protected seats

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Bonnet AreaThe pressure seal bonnet has been designed with a graphite composite seal. The bonnet has sufficient mechanical bolting to ensure the seal does not relax during periods when the system is not pressurized. In addition to the high reliability of the seal, the bonnet area has been designed to minimize the problems associated with maintenance on large gate valves by oversizing the segment rings. The valve has been designed so that the bonnet does not have to be forced in to the valve bonnet throat to allow for the segment rings to be removed. The large bolting used to ensure that the pressure seal is always loaded has also been utilized to enable simple disassembly of the bonnet once the easy to extract segment rings have been removed.

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Gland AreaThe gland design is similar to the standard design employed throughout the ValvTechnologies’ valve product line. It features additional graphite due to the sliding stem. The stem and gland are hardcoated ground and polished. The packing is secured by our standard four-bolt minimum live loaded packing system which has 316SS woven wire mesh anti-extrusion rings compressing a grafoil center ring to ensure a dependable seal.

Discs and Seat AreaThe valve discs and seats have been hardcoated with the same chrome carbide coating (68-72 RC) as its counterpart ValvTechnologies’ metal seated ball valves. These seats are magnitudes harder than Stellite 6, (typically 34-38 RC), and are lapped to achieve zero-leakage under full differential pressure conditions, including vacuum. The large Inconel Bellville spring load ensures a high initial seal with the line pressure increases assisting the sealing. The chrome carbide hardcoated web guide ensures the discs are kept parallel through the entire valve stroke, whether the valve is in the open or closed position, overcoming a common gate valve problem. As the valve is cycled under differential pressure, the extremely hard surfaces continually burnish and polish each other rather than scratching and galling.

Back Seat AreaThe back seat is hardcoated with chrome carbide (typical hardness 68-72 RC) and polished to achieve zero-leakage.

T-slot and Oversized Diameter Stem Lends to the durability and robust design5



Applications• Power Industry• Anywhere 600# and above steam systems are employed

• On/off service• Pump isolation• Feed water lines• Steam and HP water lines

• Paper & pulp• Plant powerhouse

Isotech®

Features BenefitsThe sealing surfaces are coated with chrome-carbide hardcoating to RC 72 hardness, then diamond lapped for a precision fit

The exceptional hardness and temperature ratings to 1800°F make our valves extremely resistant to attach of abrasives and fluids, particularly steam and flashing water.

Designed for ease of maintenance

The only requirement is for the disc to be flat against the seat. This is easily accomplished as there are no precise angles to maintain. Pressure seal bonnet has been designed to facilitate easy removal when necessary.

Protected seats

In the full open position, the flow through “conduit” is positioned precisely between the seats, eliminating turbulence and flow impingements on the seats. There is no gap between our conduit and the valve seat. Small gaps in our competitors’ valves cause extreme turbulence and in come cases cavitation.

Self-cleaning

Frequent valve usage polishes the surface for less torque and improved sealing. The high spring load insures contact throughout the stroke of the valve and prevents particulates migrating between the disc and seat also helps assist in the honing action.

Various flow control options, including a v-port orifice This is ideal for warm-up and some bypass requirements

Stem extensionsBecause of the low break-away and running torque, various stem extensions are available so that handwheels and actuators can be located remote from the valve.

Tight shut-offAs a standard, ValvTechnologies meets zero-leakage requirements on low-pressure air and high-pressure water.

High spring loadValvTechnologies’ very high spring load not only assures contact between the gate and seat, but at all positions from open to close. This allows zero-leakage on hydrogen on vacuum.

Parallel discsUnlike conventional designs where the discs are only parallel in the closed position, Isotech® valves are designed to maintain its parallel discs from both the fully-open to the fully-closed position.

Oversized stem diameter in comparison to other PSG designs along with or in combination with the tee-slot as opposed to a threaded and pinned hanger.

Increased reliability with this durable, robust design.



Location: England

Background: The power station, situated in England, is the largest, cleanest and most efficient coal burning power station in the United Kingdom. Its generating capacity is 3,960 megawatts and at current output levels generates enough electricity to meet the needs of seven percent of the United Kingdom. This plant, greatly concerned about the environment, focuses on a low-carbon economy, a concept that refers to an economy which has a minimal output of greenhouse gas emissions into the biosphere, but specifically refers to the greenhouse gas, carbon dioxide (CO2). Understanding their very important role in the transition towards a low-carbon economy, the power station is committed to reducing emissions and have various projects ongoing which will deliver significant savings.

Requirement: ValvTechnologies’ UK distributor specialized in the supply of critical and severe service valve isolation solutions. In 2004, they began supplying ValvTechnologies V1-1 metal seated severe service ball valves for problem areas such as drains and bypasses for the power station. Because of the longevity and reliability of the isolation provided on the drains and by-passes, the station began to use the ValvTechnologies products in other applications.

During 2007 and 2008, the distributor supplied a number of 12, 14, 18 and 20” diameter, Isotech® valves for units one-three on the feed system (start and standby feed pumps, HP heater feed inlet and outlets). These are powerful pumps that can move water at the rate of 150 gallons (568 liters) every second.

Solution: The valves proved successful in providing single isolation, which allowed maintenance to be carried out on tube leaks without shutting down the entire system. The distributor has since supplied 8” and 10” diameter Isotech® valves to the power station taking the total number of units to 36. The ValvTechnologies’ zero-leakage valve range is the premier solution where isolation is required for critical and severe service applications, providing increased safety and reliability, while reducing emissions, contributing to a cleaner environment.

ValvTechnologies provides field proven solutions for severe service applications.

Corporate Office & Manufacturing PlantValvTechnologies, Inc.5904 Bingle RoadHouston, Texas 77092 U.S.A

Phone +1 713 860 0400Fax +1 713 860 [email protected]

Isotech® Parallel Slide Gate Proven Success in Single Isolation

©2015 ValvTechnologies, Inc. All rights reserved.802_Case Study: PSG_January 2015.



Location: United States

Background: While problems with turbines are rare, routine maintenance and repair is necessary and required. It is essential that the turbine be turned with dry steam. If water gets into the steam (moisture carry-over) rapid impingement and erosion of the blades occurs. This can lead to imbalance and catastrophic failure. Any imbalance of a rotor can cause vibration requiring the turbine to be isolated and shut down immediately. In the event a turbine requires maintenance or immediate repair, it is essential to have high-quality, reliable valves for the turbine to be isolated. Failure to completely isolate a turbine can result in a complete or partial plant shutdown, causing safety concerns and increased maintenance costs.

Requirement: A chemical plant in the southern United States was experiencing moisture carry-over into their turbine. The turbine isolation valves were 20“ wedge gate valves with a six inch bleed valve. This particular chemical plant has its own power and steam system. It has several boilers that discharge into a steam header and then the steam header furnishes steam for the plant to use and also delivers steam to the turbines. This system design allows a turbine to be isolated and removed from service for maintenance while not effecting operation of the plant. The turbines were designed with a double block-and-bleed valve assembly to ensure that the turbines could be isolated. When closed, the wedge gate valves leaked so severely that steam passed through the valves and into the turbine. The leak made it impossible to perform turbine maintenance repair and the plant would have to be completely shut down so that the turbines could be accessed. With each occurrence, the cost associated with shutting down the plant was several million dollars per shut down.

Solution: To solve this problem, ValvTechnologies furnished two, 20” Isotech® valves with a 6” bleed valve and the associated bypass valves. These valves were welded together in an assembly that measured 20’ in length from end-to-end. The client requested this assembly so the installation could be expedited and the total plant shut down time was kept to a minimum. The two Isotech® valves and the associated assembly were installed in March of 2004 and the valves have operated numerous times since installation and continue to isolate. Isotech® addresses the need for true in-line reparability in large diameter, high-energy piping systems. Specifically designed for steam and feedwater applications, the Isotech® provides bidirectional, zero-leakage operation for reduced downtime and maintenance costs as well as increased reliability and efficiency.

Steam turbine damageby water induction is a costly economic, safety and reliability concern.



©2015 ValvTechnologies, Inc. All rights reserved.804_Case Study: Turbine Isolation and PSG_February 2015.

Turbine Isolation & Isotech® (PSG) Valves

Bidirectional, Zero-Leakage Operation



V1-1

Isotech®Parallel Slide Gate Valve

Exceptional DurabilitySpecifically designed for steam and feedwater applications, Isotech® provides bi-directional, zero-leakage using the robotic thermal spray coating systems. It is available in sizes 6” to 36”, pressure classes ANSI 300 to 4500, and can be manufactured in any material. When used in power industry applications, Isotech® carries the ValvTechnologies four-year, zero-leakage guarantee.

Where is this valve usually found?Power applications including: main stream isolation, hot/cold reheat isolation, HP turbine isola-tion, LP/HP heater isolation, feed water isolation

What is the target maket?• Power industry• Anywhere 600# and above steam systems are employed: on/off service, pump isolation, feed water

lines, steamand hp water lines

How does it usually solve customer problems?The ValvTechnologies Isotech® addresses the need for true in-line valve repairability in large diameter, high energy piping systems. Isotech® has exceptional durability in large part due the use of our robotic thermal spray hard coatings with a RC 70 seat hardness, and are designed for up to ASME/ANSI Class 4500 at 1800°F (982°C).

Other comments:An Isotech® differentiator is that high differential pressures are not required to provide zero-leakage. In fact, the valves will shut off at vacuum.

True in-line valve repairability in large diameter, high energy piping systems.



©2014 ValvTechnologies, Inc. All rights reserved.1209_Product Focus: Isotech_November 2014.

Isotech® Key Performance Features and BenefitsFeatures Benefits

Robotic thermal spray coating

Superior vs. competitors’ use of Stellite, which is susceptible to cracking, scratching, transference and galling at elevated temps presenting hazards to process equipment. Up to 72Rc

Integrated metal to metal seat No leak paths; Extended valve life

Zero turbulance Extended valve life

Easy adaptation for bypass and equalization Increased process flexibility

Bi-directional Enhanced process safety; Increased process flexibility

Simplistic design Ease of actuation; Extended valve life

Made in the USA Four year, zero-leakage guarantee; local support



Isotech® Installed Base SIZE (IN) PRESSURE CLASS QTY MEDIA INSTALL DATE COUNTRY

30.00 600 1 Power 2000 US

10.00 2500 1 Power 2001 US

8.00 2500 1 Power 2003 US

12.00 2500 1 Power 2003 US

20.00 1500 1 Power 2003 US

6.00 2500 2 Power 2003 UK

6.00 2500 2 Power 2005 US

6.00 2500 2 Power 2005 US

6.00 2500 2 Power 2005 US

6.00 2500 3 Power 2006 South Africa

6.00 2500 2 Service 2006 US

12.00 300 6 Power 2006 UK

14.00 1500 12 Power 2006 UK

18.00 300 3 Power 2006 UK

20.00 300 9 Power 2006 UK

8.00 3100 1 Power 2006 UK

6.00 600 1 Power 2007 US

24.00 300 2 API 2007 US

14.00 2500 2 Power 2007 US

8.00 4500 1 Power 2007 US

10.00 2500 1 Power 2007 China

14.00 2500 2 Power 2007 China

14.00 2500 2 Power 2007 China

8.00 1500 5 Power 2007 China

6.00 900 5 Power 2007 China

8.00 900 5 Power 2007 US

6.00 1500 4 Power 2007 UK

18.00 900 2 Power 2008 China

20.00 900 6 Power 2008 China



SIZE (IN) PRESSURE CLASS QTY MEDIA INSTALL DATE COUNTRY

24.00 1500 2 Power 2008 China

24.00 900 1 Power 2008 China

6.00 600 4 Nuclear 2008 US

8.00 900 2 Hydrocarbon 2008 Europe

8.00 1500 3 Power 2008 UK

10.00 1500 3 Power 2008 UK

8.00 2500 2 Spec 2008 China

10.00 2500 1 Spec 2008 China

6.00 2500 1 Power 2008 US

6.00 4500 4 Power 2008 US

12.00 300 1 Service 2008 UK

6.00 2500 1 Power 2009 US

6.00 900 1 Power 2009 US

8.00 2500 1 Service 2009 US

8.00 2500 4 Power 2009 UK

12.00 2500 8 Power 2009 US

6.00 1500 2 Power 2009 UK

8.00 2500 3 Power 2010 China

6.00 1500 2 Power 2010 UK

14.00 2500 4 Power 2010 UK

12.00 2500 2 Power 2010 China

12.00 2500 2 Power 2010 China

8.00 2500 1 Power 2010 US

12.00 1200 1 Power 2010 US

6.00 2250 2 Power 2010 US

6.00 1500 1 Power 2010 US

10.00 1500 2 Power 2010 US

14.00 2500 4 Power 2010 UK

Isotech® Installed Base



SIZE (IN) PRESSURE CLASS QTY MEDIA INSTALL DATE COUNTRY

6.00 1500 1 Power 2011 Europe

18.00 600 2 Power 2011 Europe

12.00 900 2 Power 2011 Australia

12.00 2500 2 Power 2011 South America

12.00 2500 3 Power 2011 US

12.00 900 1 Spec 2011 US

16.00 2500 2 Power 2011 Asia

8.00 2500 1 Interc 2011 Europe

8.00 2500 1 Power 2011 US

6.00 1500 1 Power 2012 Europe

18.00 2500 1 Power 2012 US

18.00 600 2 Power 2012 US

12.00 900 1 Service 2012 Australia

12.00 2500 2 Power 2012

12.00 2500 1 Power 2012 US

14.00 1500 2 Power 2013 Europe

12.00 2500 2 Power 2013 US

14.00 2500 2 Power 2013 US

12.00 2500 2 Service 2013 US

12.00 2500 2 Power 2013 Canada

10.00 900 1 Power 2013 Asia

24.00 900 1 Oil & Gas 2014 Europe

10.00 1500 1 Oil & Gas 2014 Canada





Isotech® Installed Base

Isotech® Product Overview

ValvTechnologies, Inc. is a global leader in the design and manufacturing of flow control devices. Founded in 1987 and headquartered in Houston, Texas, ValvTechnologies remains focused on helping customers meet their daily production and process challenges safely and efficiently.

Having built a global reputation for superior quality and dependability across every industry served with products designed to fulfill the requirements of standard applications to the most sophisticated, severe-service processes, ValvTechnologies meets the demands for total flow control solutions, whether one valve at a time, or system-wide.

Bringing together the best people and the latest in technological design and manufacturing processes, ValvTechnologies has created an atmosphere where quality and dependability are built into every product, start to finish.

©2015 ValvTechnologies, Inc. All rights reserved.Isotech Product Overview February 2015

Worldwide Office Locations

PeruLima

[email protected]

BrazilSão Paulo

[email protected]

United [email protected]

AustraliaBrisbane

[email protected]

ChinaShanghai

[email protected]

ChinaChengdu

[email protected]

ChinaBeijing

[email protected]

Eastern EuropeWarsaw

[email protected]

Middle EastDubai

[email protected]

IndiaChennai

[email protected]

Japan/KoreaSeoul

[email protected]

SpainMadrid

[email protected]

Headquarters & ManufacturingValvTechnologies, Inc.5904 Bingle RoadHouston, Texas 77092 U.S.A.Telephone +1 713 860 0400Fax +1 713 860 [email protected]

To locate a distributor or satellite office near you, visit us online at:www.valv.com

To contact sales anywhere in the world, email [email protected]

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