World Class Clampseal® Feedwater PumpRecirculation Bypass Valve

• High Pressure Drop

• Flexible Number ofWhisperjet Stages

• Prevent Feedwater Pump Overheating

• Save Component Wear

Conval Clampseal® RecirculationBypass Valves are designed to prevent overheating of feedwaterpumps during critical low-load operating periods.

STANDARD SIZES1/2" through 4"Angle, Y or T-pattern SW, BW Ends

PRESSURE RATINGASME Class 600 through 4500

STANDARD MATERIALSCarbon Steel SA 105Chrome-Moly SA 182-F22, F91

STANDARD ACCESSORIESActuators - Air, Motor, Hydraulic, Manual

DESIGN FEATURES High-performance Packing SystemCorrision-inhibited, high-density graphitic

packing, uniform loading from the axial one-piece gland, highly polished stem and stuffingbox ensure a tight seal.

Leak-proof Bonnet/ChamberA secure, leak-proof bonnet allows rapid accessto valve trim for inspection and maintenance.

Pressure Actuated BackseatMaximum valve integrity ensures a positiveinternal stop for the valve stem and discassembly while extending packing life bysecurely isolating the packing from linepressure when the valve is fully open.

In-Line ServicingConval's recirculation bypass valve is theworld's most serviceable valve of its type. Thetopworks assembly can be replaced in minutes.

Long Device LifeWith the Whisperjet, high-pressure water isdischarged through a series of multi-pressurereduction stages. Each Whisperjet section has4-6 orifices around the perimeter. The orificesdischarge inwardly, which allows flow streamsto impinge on each other rather than on thevalve or sections themselves. This reduces thepressure in stages and prevents criticalpressure drop from occurring, which serves tominimize erosion by limiting the velocity of thefluid through the valve.

Longer System LifeWhen Whisperjets are used in conjunction witha valve or other system components, the seatlife of the valve is substantially increased.When used before a condensor or flash tank, thebaffel and tank wear is greatly reduced.

ReliableWhisperjets have been installed in power plantapplications around the world for over 30 years.They are proven to be rugged and reliable inhigh-pressure environments.

EconomicalDue to their modular design, Whisperjet-fittedClampseal globe valves are low-costalternatives to control valves in minimum flowfeedwater pump recirculation systems.

Flexible The number of Whisperjet stages may be variedfor almost any flow requirement. Ourengineering department will work with you tocustom-specify Whisperjet to meet your needs.

2

3

SPECIFICATIONS

Typical Specification AInlet: 2845 psi water @ 310*F

2" socket weld pipe

Outlet: 115 psi water

Flow: 110 gpm (60,000 #/hr)

Solution: Conval Feedwater Pump Recirculation BypassValve with 11-stage Whisperjet

Typical Specification BInlet: Valves 1 and 2 1850 psi water @ 350*F

2" socket weld pipe

Outlet: 45 psi water

Flow: Valve 1 160 gpm; valve 2 240 gpm

Solution: Valves 1 & 2 Conval Feedwater PumpRecirculation Bypass Valve with 8-stage Whisperjet

PUMP

TOPROCESS

Single Stage Bypass

STORAGEVESSEL ORDEAERATOR

Figure Number2.00-22P2DJ-F228J

PUMP

TOPROCESS

Two Stage Bypass

STORAGEVESSEL ORDEAERATOR

Figure Number2.00-21P2DJ-F228J

(.902 Equivalent Orifice Size)

Figure Number2.00-21P2DJ-F228J

(.738 Equivalent Orifice Size)

The Conval StoryIn 1962, Mr. Chester Siver completed designs for a revolutionaryline of high-pressure, forged steel valves. Hamilton Standard(now Hamilton Sunstrand), a division of United TechnologiesCorporation, was asked to use their then-new Electron BeamWelding technology for joining of parts into valves forsubassemblies. Hamilton Standard became intrigued with thevalve as an ideal application of the Electron Beam Weldingtechnique, and negotiated a contract for the rights to manufacture and sell the valve. Mr. Siver served as manager of the valve project.

The first CLAMPSEAL® valves were introduced to the market by Hamilton Standard in 1964. However, in the mid-1960’s, growing demand for the firm’s popular aerospace products forced Hamilton Standard to make thedecision to abandon its industrial products projects. The rights to the CLAMPSEAL valve reverted back to Mr.Siver. Since CLAMPSEAL valves were born in Connecticut, Mr. Siver founded “Conval” (short for ConnecticutValve) in 1967. Today, the valves are still manufactured in Connecticut, a state with a longstanding reputationfor technological innovation and manufacturing excellence.

Conval celebrated its 40th anniversary in 2007 with the launch of the new Camseal Ball Valve. Conval hasgrown into a leader in valves for the world’s most demanding applications. We have a global team of experts tohelp to meet your most challenging needs. We invite you to contact us today.

High-pressure, high-temperature ball, bellows, bonnetless, check, gate, globe, throttling, and urea service valves for the world's most demanding applications.

1967-2007Celebrating 40+ years of excellence!

Thank you for your business.

World Headquarters: 265 Field Road P.O. Box 1049, Somers, CT 06071-1049 USA

Phone (860) 749-0761 Fax (860) 763-3557

e-mail: sales@Conval.com www.Conval.com

Form Feedwater2008-KIT Printed in USA

Conval’s policy is one of continuous development and improvement. Every effort is made to produce up-to-date literature but this catalog should not be regarded as aninfallible guide to current specifications and does not form part of any contract. Conval reserves the right to make product improvements and changes without prior notice.

ISO 9001 certified sinceSeptember 11, 1992

MADE IN USA