High Pressure Turbine Bypass Valve

HBSE™

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The Rugged, Compact Steam Conditioning Solution

The HBSE™ Turbine Bypass Valve by CCI is the standard turbine bypass

valve for high pressure bypass systems of combined cycle power plants.

With a compact, robust design that easily fits into most existing piping

arrangements, it can be installed in any orientation. All components,

including the flow diffuser, are removable through the top of the valve

making maintenance and inspection quick and easy. The spherical body

shape has been designed to avoid material concentrations and abrupt

changes of wall thickness, minimizing thermal stress in the valve. In

addition, the HBSE™ is available as a combined control and safe shutoff valve

according to TRD 421.

Spring-Loaded Nozzle Desuperheating

HBSE™ desuperheating features integral spring-loaded water-injection

nozzles that optimize water-injection over a wide range of flow rates at low

pressures. With a rangeability of up to 50:1, the spring-loaded water-injection

nozzles vary the water flow area as required to achieve the fine water droplet

size needed for atomization.

The spring-loaded water-injection nozzle design provides the smallest water

droplet size possible without steam assist.

Small-Drilled-Hole Cage Technology

The HBSE™ Turbine Bypass Valve uses Small-Drilled-Hole Cage (SDHC)

technology to provide system noise attenuation through frequency shifting.

Frequency shifting is a proven method of noise attenuation recognized by

ISA in Technical Standard SP75.07 and by the IEC in Technical Standard 534-

8-3.

In frequency shifting, the main flow stream is separated into hundreds of tiny

jets. The size of the jets, which are primarily based on hole size, determines

the resulting noise frequency – the smaller the size of the jet or drilled hole,

the higher the frequency which in turn produces a lower dBA level. Small-

Drilled-Hole Cage technology is well suited for high pressure combined

cycle and drum boiler turbine bypass applications requiring moderate noise

performance.

Unlike traditional drilled hole cages, the SDHC trim uses over one thousand

small drilled holes spaced apart in a special pattern designed to ensure full

jet separation, structural integrity, and noise attenuation. All drilled hole

technology is not the same – large drilled holes do not shift the frequency

high enough, and improper spacing between drilled holes allows the jets to

rejoin and form larger jets after exiting the cage. The conical flow diffuser

shape limits vibration by increasing the structural strength when compared

to cylindrical cage designs.

HBSE™ from Sulzer Valves delivers pressure reduction, temperature control and fast response in a compact, high pressure steam conditioning valve.

Water-injection nozzle provides smallest water droplet size possible

Good atomization at wide range of flow rates

Small-Drilled-Hole Cage technology uses frequency shifting to maximize noise attenuation

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Highly reliable, fast, accurate pneumatic and hydraulic actuators provide superior system control.

Accurate Control and Available TRD 421 Safety Function

CCI’s long history of developing advanced technology valves and actuation

systems for severe service and safety-related applications has led to the

development of the most reliable actuation systems available today. CCI

has supplied pneumatic and hydraulic actuation systems for over 30 years

and has an extensive installed global base. In addition, if equipped with

the necessary safety control devices in combination with the CCI hydraulic

actuation system, the HBSE™ can be used as a combined control and safe

shutoff valve according to TRD 421.

The selection of pneumatic or hydraulic actuation is primarily a function of

valve design for the particular application as well as customer preference. A

comparison of the factors influencing actuator selection is given in Table 1.

Improve Plant Efficiency – Eliminate Lost Steam

During normal operation, any leakage past a turbine bypass valve means lost

revenue.

g Steam that does not go through the turbine does not generate electricity or

revenue for the plant.

g Money spent generating the steam is lost.

g Steam leaking past a valve seat could erode the seat and cause an increase

in the leakage rate and maintenance downtime.

g Steam leaking past a valve to condenser could reduce the efficiency of

the condenser by deteriorating the vacuum and raising the condenser

temperature.

The CCI HBSE™ Turbine Bypass Valve comes standard with DIN 3230, Rate 3

or ANSI/FCI 70-2 Class V Shutoff, providing dependable, repeatable, shutoff

for long periods of time with high pressure differentials. DIN 3230, Rate 1 or

MSS-SP-61 Shutoff is standard with hydraulic actuation.

Table 1: Factors Influencing Actuator Selection

etubirttAecnamrofreP rotautcAcitamuenPICC rotautcAciluardyHICC

deepSekortS )lanoitpo(dnoceS1nahTsseL,tsaF sdnoceS5.0nahTsseL,tsaFyreV

noituloseR %1nahTsseL,dooG %1.0nahTsseL,dooGyreV

tsurhTrodecnalaBrofstnemeriuqeRtsurhTsteeM

sevlaVtaeSdezirusserPdecnalabnUrofstnemeriuqeRtsurhTsteeM

sevlaV

ytilibaileR tsuboRdnaelbaileRyreV tsuboRdnaelbaileRyreV

tsoCtnemerucorP evisnepxenI tsoCrehgiH

tsoCnoitallatsnI evisnepxenI tsoCrehgiH

ecnanetniaM sllikSmuideMhtiW,ysaE ecnanetniaMrofsllikSrehgiHseriuqeR

stnenopmoC seirosseccAelbaileR,erusserPwoL seirosseccAnevorP,erusserPhgiH

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Optimized Body Shape For Minimal Thermal Stress

Designed for cyclic operation and frequent start-ups.

No Trim Parts are Welded or Screwed Into the Valve Body

Small-Drilled-Hole Cage Technology

Ensures low noise levels.

Spring-Loaded Spraywater Nozzle

Desuperheaters

Provides superior atomization.

Mounted directly to outlet eliminating need

for additional piping sections.

Top Entry Design

Minimizes service time.

Spraywater Manifold System

Multiple attemperation injection points with single water supply source connection.

Linear Modified Equal Percentage

Valve Performance Characteristics (% Cv vs. % Stroke)Valves can be characterized to accommodate a wide range of variables.

Modified Linear

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Use this checklist to evaluate the benefits of the HBSE™ design.

1. Special needs can be accommodated. Please consult with the factory.2. Flexible tubing is standard for the spraywater manifold system. Rigid piping manifold option is available.3. Dump tubes available if required.

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Table 2: Dimensional Information

1. All dimensions are in inches except () are in millimeters.2. Dimension C* is for a hydraulic actuator.3. Buttweld per ANSI B16.25 and mating pipe schedule.4. Valve may be installed in any orientation. The upper structure does not require additional support.5. Flexible tubing to a single connection manifold is supplied as standard.

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eziSepiPteltuO)hcni( A B C *C

001 "6-"4 "01-"6 )051(9.5 )063(2.41 )0331(25 )0801(34

051"6-"4 "01-"6 )051(9.5 )063(2.41 )0331(25 )0801(34

"21-"8 "61-"21 )052(8.9 )004(7.51 )5631(45 )5111(44

002 "21-"8 "61-"21 )052(8.9 )004(7.51 )5631(45 )5111(44

052 "21-"8 "81-"41 )003(8.11 )535(1.12 )0931(55 )0411(54

003 "41-"01 "22-"81 )053(8.31 )056(6.52 )5241(65 )5711(64

053 "61-"21 "42-"02 )004(7.51 )067(9.92 )0641(85 )0631(45

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1. Alternate materials available per customer’s specific design requirements.2. For hydraulic actuator, plug/stem material is X19CrMoVNbN111.

Table 4: Materials

1

6

2

5

3

8

7

4

Technical specifications and materials.

Table 3: Capacity and Performance Data

1. Rangeability may vary with process conditions. Consult with factory.2. For exact pressure/temperature rating, consult factory.3. Electro mechanical actuation available on request.

Table 5: Recommended Desuperheating Lengths Using Spring-Loaded

* With saturated steam, to avoid pipe erosion and liquid drop-out due to droplet impingement, bends should be avoided.** Saturated steam conditions cannot be controlled through downstream temperature measurement. Feed-forward/enthalpy control recommended.+ All dimensions are in feet except () are in meters

DRAG is a registered trademark of CCI.©2002 CCI 394 3/02 10M

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