Red ValveValve Select ion Guide for the Power Industry

P Reliable design provides years of trouble-free service

P Full-port opening allowsmaximum flow without clogging

P Self-cleaning pinch sleevebreaks up dewatered material

P Elastomer technology outlasts metal on abrasive applications

P Smooth centerline closure results in drop-tight sealing

Red Valve’s complete line ofRedflex ® rubber products

includes ducting joints,expansion joints andrubber fittings in avariety of styles and materials.

Red Valve’s Series 70Manual Pinch Valve is an

ideal replacement for plugand ball valves. The valve’s

full-ported sleeve is the onlywetted part, eliminating

packing replacement.

for the toughes

Red Valve products are ideal for use throughout coal-fired power plants. With a high

demand for long-term, reliable performance and low maintenance requirements,

the power industry has looked to Red Valve for its slurry control products since the

company’s founding in 1953. Red Valve products have become the standard in power

plants worldwide because they are the only valves that provide dependable, lasting

service on tough applications like coal feed, ash, lime and slurry control.

Providing a bi-directional shutoff,Red Valve’s Flexgate valve isdesigned with a stainless steel gateand two heavy-duty elastomer cartridge seats – ideal for difficultabrasive slurry applications.

Red Valve:Series 75

Pinch Valve

Pinch ValvesFlexgate Valves

Redflex® Expansion Joints

Red Valve’s Series G Knife Gateis fully 316-lined and available

in sizes to 144 . A resilient,elastomer seat is available forabrasive applications.

Providing a full 360° pressure reading,Red Valve pressure sensors are

the industry standard for protecting instrumentation and ensuring

accurate, dependable pressure measurement.

The Series 5200 ControlPinch Valve provides accu-rate, repeatable control on

slurries. An elastomersleeve is the only wettedpart, for long-term throt-tling even on abrasive or

corrosive material.

Red ValveProducts AreIdeal for:P S02 removal systems

P Raw-water intake

P Coal handling

P Bottom ash

P Fly ash

P Condenser box feed

P Water treatment/deionized water

P Lime feed

P Absorber towers

P Effluent discharge

t applications in the power industry

Series 75s on control spray nozzlesSeries 75s on control spray nozzles

Large-diameter Series 75 manual PinchValves on a lime-recirculation lineLarge-diameter Series 75 Manual PinchValves on a lime-recirculation line

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Pressure Sensors

Series G Knife Gates

Control Valves

Series 75 Manual Pinch Valves on lime slurry feed linesSeries 75 Manual Pinch Valves on lime slurry feed lines

The pinch valve sleeve’s flexing actionbreaks away any solid or dewatered slurrybuildup. The full round port sleeve has nopockets for slurry to plug or erode.

The flexing action of the sleeve self-cleans, breaking up even dewatered lime.

Red ValvesSelf-Clean

Take Control of Lime Slurry in Yo

Pinch valves are the ideal choice forhandling the abrasive and corrosiveslurries created in Flue GasDesulfurization (FGD) systems.Pinch valves are used on lime feedlines because they have an unparal-leled ability to throttle lime slurrywithout plugging or scaling buildup.

Pinch valves also provide a posi-tive, drop-tight shut-off, ofteneliminating the need for asecond isolation valve.

With a pinch valve, all of theprocess is contained within thesleeve, preventing hardening orscale buildup of the lime slurryfrom hindering valve operation.Further, lime has a tendency todewater and plug pipelines.The flexing action of a pinchvalve will break up dewateredlime and prevent plugging.

Manual pinch valves are commonlyused on lime feed, hydrocyclonebypass lines and pump isolation.Manual pinch valves outlast stellitemetal valves and trims 15:1 inabsorber reagent, recycling and sumpdischarge applications.

Full-port opening Centerline closure Drop-tight seal

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Series 5200 Control Valves with cone sleevetrim on lime slurry; Pleasants Gypsum Plant

Series 75 Manual Pinch Valves on scrubber systemSeries 75 Manual Pinch Valves on scrubber system

Series 5200 Control Valve on recirculated lime Series 5200 Control Valve on recirculated lime

Series 5200 Control Valves with cone sleevetrim on lime slurry; Pleasants Gypsum Plant

Control pinch valves incorporate Red Valve's patented cone sleevetrim to control the flow rate of limeslurry into the FGD system and onrecirculation loops.

Where diaphragm or weir type valveslast just a few months, Red ValvePinch Valves with properly sizedcone sleeves last for years. With addi-tional wear rubber on the down-stream side, Red Valve’s cone sleeveprovides optimal service life withminimized recovery inside the sleeve.

Red Valve manual and control pinchvalves are also widely used on calci-um sulfate, a byproduct of an FGDsystem. Calcium sulfate is then usedas a synthetic gypsum for wallboardmanufacturing. The process of dewa-tering scrubber sludge and adding flyash or chemical drying agents is idealfor Red Valve pinch valves becauseof its accurate throttling ability.

RED VALVESERIES 40PRESSURESENSOR

DIAPHRAGMSEAL

CLOGGED ANDINOPERABLE

ACCURATE MEASUREMENT

ur Flue Gas Desulfurization System

Ideal for throttling control, Red Valve’s

cone sleeve trim creates a pressure drop

designed to match the flow rate of the

application. With additional wear rubber

on the downstream side, Red Valve’s cone

sleeve provides optimal service life with

minimized recovery inside the sleeve.

Heavy-Duty

Downstream Wear Area

FlowDirection

Pressure Sensors

Cone Sleeve

Red Valve pressure sensors are non-clogging

due to their full-port design. Pressure is

measured along the entire inside diameter of

the sensor, for accuracy under extreme conditions.

The reliability of the Red Valve sensor makes it a popular choice

for protecting expensive capitol equipment.

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Series 75s on lime feed linesSeries 75s on lime feed lines

Fail-closed control valves on ashFail-closed control valves on ash

Pressure sensor with gauge and transmitterPressure sensor with gauge and transmitter

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Knife Gates on Fly and Bottom Ash

A stainless steel gate passes throughtwo heavy-duty reinforced rubber slur-ry sleeves. These sleeves provide acompression fit resulting in a drop-tight seal. When the valve is in theopen position, the gate is completelyremoved from the flow path, eliminat-ing any obstructions. In the closedposition, the valve provides a bi-directional seal.

Closing Action of the Flexgate Knife Gate Valve

Open Closing Closed

Flexgates on bottom ashHydraulically actuated Flexgate valve used for fly ash hopper isolationHydraulically actuated Flexgate valve used for fly ash hopper isolation Flexgates on bottom ash

Ash is the most abrasive applicationwithin a power plant. Red Valve pinchvalves and knife gate valves are regular-ly used in fly ash service. Piston-actuat-ed knife gate valves are used on transferlines and for hopper isolation once theash is shaken out into the precipitators.

The Series G Knife Gate has an eco-nomical cast-iron body with a stainlesssteel lining and gate that provide theperformance of an all-stainless valve ata fraction of the cost. The Series G isavailable with a metal or resilient seatand can be operated manually, pneu-matically or electrically.

Bottom ash systems most often useRed Valve’s Flexgate Slurry KnifeGate. The Flexgate uses two elas-tomer seats to provide excellent wearresistance and bi-directional sealing.The replaceable seats act as a wiperto clean the gate during operation,thereby reducing packing wear.

Flexgates are often used in sluicingand slurry transfer lines to lagoons,and, when ash is used as an additiveto cement, knife gates are used ondense phase conveying systems.Both knife gate styles are available inlarge-diameter sizes.

FlexgateSeries G

Limit switches indicate full-openand full-closed.

With bi-directionalelastomer seats

With cast iron body lined with 316 stainlesssteel, for high-tempera-ture applications

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Red Valve Type A pinch valves areregularly specified for the convey-ing and injection of coal. Theadvantages of the Type A air-oper-ated pinch valve are its full-portopening and abrasion-resistantpinch sleeve. The Type A wasintroduced in 1953 for use on theworld’s first coal slurry pipeline.

Coal Feed and Washing

Even at high velocities, the Type APinch Valve will outlast a metal-seated valve due to the durability ofits elastomer sleeve. The resiliencyof the sleeve reduces wear andallows the Type A to seal drop-tighton coal that is trapped in the seal-ing area.

The operation of the Type A is sim-ple and reliable. The body func-tions as a built-in actuator, eliminat-ing the need for pneumatic,hydraulic or electric actuators.Varying the pressure within theannular space between the bodyand the sleeve can open, throttle orclose the valve. There are no slidingor rotating parts and no deadspaces where material can collect.

The Type A can also be used foropen-loop control in non-critical,low-pressure-drop applications.With the addition of a proportionalrelay, the Type A Pinch Valve is aneconomical slurry control valve.

The Type A Pinch Valve makes an excellent, low-cost throttling valve. By using a booster relay, a3-15 psi air signal can be used to modulate thevalve. This arrangement eliminates both thecostly external actuator and complicated posi-tioner required by other control valves.

Air toType A

Exhaust

Plant AirSupply

The Type A is ideal for use on slurry linesbecause of its full port, large sealing areaand ability to break up solids.

Instrument Air

Circa 1953

Type A controlling flow of bottom ash to settling pondsType A controlling flow of bottom ash to settling ponds

Type A: The only valve that closes on solidsType A: The only valve that closes on solids

Control Flow with a Type A

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Wastewater Treatment and AerationTideflex® Check Valve technologyprovides superior backflow preven-tion in many different areas of apower plant. For wastewater treat-ment, each Tideflex® air diffuserfeatures an integral Tideflex® CheckValve and offers optimum aerationand mixing characteristics.

Tideflex® Coarse Bubble Diffusersare the only diffusers available onthe market today that provide com-plete backflow prevention of sludgeand slurry during zero airflow peri-ods. The TF-A Diffuser is unique inthat it can be installed in any angleand any elevation. This combinationof non-clog design and flexible ori-entation allows for bottom installa-tion (below the carrier pipe) againstthe tank floor to provide completetop-to-bottom mixing and ensuretotal solids suspension.

Red Valve’s coarse bubble aerationsystems are constructed of heavy-duty standard piping materials towithstand the high turbulence pro-vided by the system. The systemsare available in sizes 40 to 80 pvc,HDPE and stainless steel.

The TF-A opens with positive air pres-sure, and the variable-orifice design

increases jet velocity of the dischargedair to improve mixing.

Reverse fluid pressure instantly seals thebill of the TF-A to prevent backflow and

clogging of the air manifold.

Tideflex ® TF-A Coarse Bubble Diffusersfeature a non-clogging Duckbill ® design

that provides superior mixing.

Tideflex ® Check Valve on effluent discharge

Tideflex ® InLine Check Valves canbe mounted in any orientation formaximum installation flexibility.

Tideflex ® Check Valve on effluent discharge

Tideflex ® InLine Check Valves canbe mounted in any orientation formaximum installation flexibility.

Tideflex ® coarse bubble duplex assembly withquick-connect removable saddle – octagon manifoldconfiguration in circular digester tank

Tideflex ® coarse bubble duplex assembly withquick-connect removable saddle – octagon manifoldconfiguration in circular digester tank

Tideflex® Check Valves are used onoutfall lines, effluent dischargelines and throughout the plant innumerous pipelines to providebackflow prevention with lowheadloss. The 100 percent elas-tomer construction of the Tideflex®

is resistant to abrasive wear andchemical attack. There are nolevers, weights, hinges or springs tofail and nothing that requires rou-tine maintenance or lubrication.

Tideflex® Check Valves are avail-able in a range of sizes and a vari-ety of styles, including end-of-pipeand inline installations. The uniqueDuckbill® design of the Tideflex®

seals tight, even on entrappedsolids, which is critical whereleaves, twigs and sediment buildupcan interfere with flapper-stylecheck valves.

ent in raw water. Red Valve’s full-port control valve seals drop-tight onentrapped debris. There are no seatsor disks to impede valve operation.

Red Valve Series G Knife GateValves are used in clean and grittywater service. Constructed of carbon steel and lined with 316stainless steel, Red Valve resilient-seated knife gate valves providedrop-tight shutoff.

For bi-directional closure,Red Valve offers Series DFlexgate Knife Gate Valves.

The Flexgate Valvefeatures rugged elas-tomer seat cartridges

that provide excellentwear resistance. Two boss-

es welded into thevalve seat ensure posi-

tive, consistent seat-ing for bi-direction-

al, bubble-tight shut-off, every time.

The importance of a reliable raw-water intake valve has made Red Valve the manufacturer ofchoice for this application. RedValve offers two styles of valvesfor this service: pinch valves andknife gate valves.

Series 5200 and 5400 ControlPinch Valves are ideal for raw-water intake. The resilient pinchsleeve isolates the valve body andoperating mechanism from theprocess fluid, allowing for consis-tent, leak-free closure. Sticks,twigs and other objects are pres-

Multi-port Tideflex ® Diffuser line

Cooling water discharge is regulated inthe U.S. by the NPDES and by similarregulations elsewhere. The common goalof these regulations is to minimize theenvironmental impact of the dischargedcooling water.

The primary concern is how much thetemperature of the discharged water willincrease the temperature of the sur-rounding river or lake. A secondary con-cern is the amount of chemical additivespresent in the discharge water, such asthose used to reduce corrosion.

Red Valve’s Diffuser Systems have beenused around the world to overcomethese concerns easily and economically.Diffusing the heated water over a largerarea greatly reduces the thermal impact.Chemicals are also more widely dis-persed and quickly carried away with thecurrent to minimize their impact.

Raw-Water Intake and Discharge

Multi-port Tideflex ® Diffuser line

Cooling Water Discharge

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36 5400E InfluentFlow Control Valve

Large-diameter Series GKnife Gate Valve

54 Series G Knife Gate Valveson a raw-water intake system

54 Series G Knife Gate Valveson a raw-water intake system

36 5400E InfluentFlow Control Valve

Redflex ® Ducting Joints are a popularchoice for blower systems. This gas recir-culation system uses a 60-inch rectangularand a 60-inch round ducting joint.

P Flue gas

P Combustion air

P Aeration

P Intake air

P Gas recirculation

P ESP / Fly ash

P Primary air

Redflex® Ducting and Expansion Joints

are used throughout a power plant in a

variety of applications:

Red Valve is a member of theFluid Sealing Association.

Red Valve’s Redflex ® division offers acomplete line of square, rectangular,circular and custom ducting joints. Weoffer a choice of arch styles to matchthe movement requirements of eachparticular installation. Custom back-up rings in galvanized or stainlesssteel are available, or, the joints can besupplied with a slip-on connectionand stainless-steel mounting clamps.

Our ducting joints are available in avariety of elastomers to match chemi-cal and temperature requirements:

P EPDM (max. temp. 300ºF)

P Chlorabutyl (max. temp. 300ºF)

P Neoprene (max. temp. 250ºF)

P Viton® (max. temp. 400ºF)

Redflex® Expansion Joints are alsoused throughout condenser and cool-ing water systems due to significantthermal expansion and contraction.Custom reducers and dimensions areavailable for recycle slurry pumps,absorber recycling and atomizer feedvibration reduction.

Like all Red Valve products, theRedflex® line is designed to handlethe toughest dry ash and slurry-han-dling applications.

Redflex ® Expansion Joints are available in avariety of sizes and styles to meet any need.

Redflex® is your single source for

elastomer joints and fittings:

P Ducting jointsP Expansion joints P ElbowsP Rubber pipeP Vibration pipeP Reducers

Custom-Designed Ducting andFlanged Expansion Joints

Circular 72-inch ducting joints on anair-recovery system at a coal-firedpower plant

Circular 72-inch ducting joints on anair-recovery system at a coal-firedpower plant

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P

Redflex ® circular 48-inchducting joints on a large-scale odor control system

Redflex ® circular 48-inchducting joints on a large-scale odor control system

Red Valve Provides the Total Solutionfor the Power Industry

Generator

Boiler

ESP

FGDSystem

LimeSilo

WasteWater

Water Treatment

Substation

Turbine

Condenser

Cooling Water

Pulverizer

Coal Washing

WasteWater

BottomAsh

Hopper

FlyAsh

Hopper Lagoon

ScrubberSludge

Gypsum

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7

8

5

4

3

2

9

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1 ManualPinch Valves

Air-OperatedPinch Valves

ControlPinch Valves

Knife Gates

ButterflyValves

Pressure Sensors

ExpansionJoints

CheckValves

DiffuserSystems

AerationSystems

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700 N. Bell AvenueCarnegie, PA 15106

© Red Valve Company, 2001, All Rights Reserved. Red Valveis a registered trademark of Red Valve Company, Inc.

www.redvalve.comThe information presented in this catalog is provided in good faith. RedValve Company, Inc. reserves the rightto modify or improve its design specifi-cations without notice and does notimply any guarantee or warranty for anyof its products from reliance upon theinformation contained herein. All ordersare subject to Red Valve’s standardterms and warranty and are subject tofinal acceptance by Red Valve. RedValve cannot be held responsible fortypographical or printer errors.

Viton and Hypalon are registered trademarks of DuPont Dow Elastomers.Teflon is a registered trademark of theDuPont Company. Redflex, Tideflex, Red Valve and the Red Valve “rv” logo are registered trademarks of Red Valve Company, Inc.

RECYCLABLEPAPER

RVP 9/01

PHONE: 412/279-0044

FAX: 412/279-7878

A Complete Line Of Quality Products . . .

Red Valve’s Series 75Manual Pinch Valve has thesame face-to-face as gate,plug and ball valves. Thevalve’s full-port sleeve is theonly wetted part.

Mr. Spiros G. Raftis, founderof Red Valve Company

Red Valve’s large-diameter influent controlvalves are ideal for wastewater treatmentplants. Benefits include a full-port, no hang-up design and accurate control.

Manufactured to 96 in diameter,Redflex ® expansion joints, reducers,rubber pipe, vibration pipe and rubberfittings are the industry standard.

Providing a full 360° pressure reading, Red Valve Pressure Sensors are the

industry standard for protecting instrumentation and ensur-

ing accurate, dependable pressure measurement.

Red Valve’s Flexgate Slurry Knife Gate is a heavy-duty,bi-directional valve engineered for operator dependabil-ity, low maintenance and excellent abrasion resistance.Red Valve’s Series G Knife Gate is fully 316-lined andavailable in sizes to 144 .

Pinch Valves

Pressure Sensors

Control Valves

Expansion Joints

Knife Gates