Eskom Holdings SOC LimitedContract number ______

project & contract title

Appendix H – Poppet Dampers Specification

1.FFP Outlet (Poppet) Dampers

Table 1 : Tutuka FFP Outlet (Poppet) Dampers Supply per Boiler Unit

Description
Number of Outlet Poppet Dampers / 20 per FFP
Number of FFP’s per Boiler Unit / 2
Total number of Poppet Dampers per Boiler Unit / 40

Table 2 : Operating and Design Temperatures and Pressures

Description / Unit / FFP Outlet Dampers
Normal Operating Pressure / kPa(g) / -4.6
+ CDP (Continuous Design Pressure) / kPa(g) / 1.7
- CDP (Continuous Design Pressure) / kPa(g) / -7.2
+ TDP (Transient Design Pressure) / kPa(g) / 1.7
- TDP (Transient Design Pressure) / kPa(g) / -8.7
Normal Operating Temperature / °C / 157
Continuous Design Temperature / °C / 174
Transient Design Temperature / °C / 383
Pressure Loss across Damper / kPa(g) / As per Contractors selected damper
Transient Design Differential / kPa(g) / As per Contractors selected damper
Expected Operating Differential / kPa(g) / As per Contractors selected damper

TheContractor notes that the transient temperatureisdefinedasfluegasflowthroughthe systemat thespecifiedtemperaturefor thirty(30) minutes.

2.Implosion (Poppet) Dampers

Table 3 : Tutuka FFP Implosion (Poppet) Dampers Supply per Boiler Unit

Description / Quantity
Number of Implosion Poppet Dampers
Note: Shaft Length to be provided Later / 4

Table 4 : Tutuka FFP Implosion Dampers General Design Conditions

Description / Units / ImplosionProtectionDampers (Closed) Note 1 / ImplosionProtectionDampers (Open) Note 2
Normal Operating Pressure / kPa(g) / -4.6 / 0 to -5.6
+CDP (Continuous Design Pressure)
Pressure) / kPa(g) / 1.7
1.71.7 / 1.7
1.7
-CDP (Continuous Design Pressure)
Pressure) / kPa(g) / -7.2
-7.2 / -7.2
-7.2
+TDP (Transient DesignPressure) / kPa(g) / 1.7 / 1.7
-TDP (Transient DesignPressure) / kPa(g) / -8.7
-8.7 / -8.7
-8.7
Normal Operating Temperature / °C / 157 / -10 to 40
Continuous Design Temperature / °C / 174 / -10 / 57
Transient Design Temperature / °C / 383 / 383
Pressure loss across damper / kPa(g) / As per Contractors selected damper / As per Contractors selected damper
Transient Design Differential / kPa(g) / As per Contractors selected damper / As per Contractors selected damper
Expected Operating Differential / kPa(g) / As per Contractors selected damper / As per Contractors selected damper

Notes:

(1)When dampers are in the closed position the poppet blades will be exposed to these conditions.Since the dampers must open outward and away from the flue the damper actuator will have to overcome the negative draft pressure in the flue. The actuator is sized, by the Contractor, to open against a -6.5 kPa(g) pressure.

(2)WhendampersareintheopenpositiontheIDfanwillbepullingambientairthroughtheimplosion protectiondampersandintotheflue. Thenormaloperatingtemperatureshowninthetable aboveforthe openpositionis theambienttemperaturedesignrange.

Table 5 : Particle Size Distribution to FFP

Particle Size (Microns) / Wt%
80.0
40 to 50
20 to 40
10 or less / 50.00%
20.00%
20.00%
10.00%

Table 6 : FFP Outlet (Poppet) Dampers Design Conditions Summary

Description / Units / FFP OUTLET(POPPET) DAMPERS
Total Mass Flow (w/o Solids) / kg/hr / 1,707,439
Total Solids / kg/hr / 11
Temperature
Temperature / °C / 157
157
Pressure / kPa (g) / -4.6
Molecular Weight / kg/kgmol / 29.56
Total Volumetric Flow (w/o Solids) / Am3/s / 724.0
N2 / vol % / 73.7
O2 / vol% / 6.9
CO2 / vol % / 11.5
H2 O / vol % / 7.0
SO2 / ppmvw / 1,137
SO3 / ppmvw / 3.7
SO2 / kg/hr / 4,000
SO2 / ppmdv / 1,226
SO3 / kg/hr / 16
SO3 / ppmdv / 3.9

Table 7 : Implosion (Poppet) Damper Design Conditions Summary

Description / Units / IMPLOSIONPOPPET DAMPERS (Closed) / IMPLOSIONPOPPET DAMPERS (Open)
Total Mass Flow (w/o Solids) / kg/hr / 1,707,439 / 360,180
Total Solids / kg/hr / 11 / 0
Temperature
Temperature / °C / 157
157 / -10 to 40
Pressure / kPa (g) / -4.6 / 0 to -5.6
Molecular Weight / kg/kgmol / 29.56 / 28.63
Total Volumetric Flow (w/o Solids) / Am3/s / 724.0 / 87.8(1)
N2 / vol % / 73.7 / 75.8
O2 / vol% / 6.9 / 22.9
CO2 / vol % / 11.5 / 0
H2 O / vol % / 7.0 / 1.3
SO2 / ppmvw / 1,137 / 0
SO3 / ppmvw / 3.7 / 0
SO2 / kg/hr / 4,000 / 0
SO2 / ppmdv / 1,226 / 0
SO3 / kg/hr / 16 / 0
SO3 / ppmdv / 3.9 / 0

Notes:

(1)Volumetricflowrateis basedon airdensityof 1.14kg/m3.

3.FFP Compartment Outlet Damper Data Sheets

FFP COMPARTMENT OUTLET (POPPET) DAMPER - DESIGN INFORMATION DATA SHEET 1 of 2
Reference
Location/Description / Fabric Filter Plant Outlet
Quantity / 40
Damper Tag Number(s) / 06NQ11S011, 06NQ11S012, 06NQ11S021, 06NQ11S022, 06NQ11S031, 06NQ11S032, 06NQ11S041, 06NQ11S042, 06NQ11S051, 06NQ11S052, 06NQ12S011, 06NQ12S012, 06NQ12S021, 06NQ12S022, 06NQ12S031, 06NQ12S032, 06NQ12S041, 06NQ12S042, 06NQ12S051, 06NQ12S052,
06NQ21S011, 06NQ21S012, 06NQ21S021, 06NQ21S022, 06NQ21S031, 06NQ21S032, 06NQ21S041, 06NQ21S042, 06NQ21S051, 06NQ21S052, 06NQ22S011, 06NQ22S012, 06NQ22S021, 06NQ22S022, 06NQ22S031, 06NQ22S032, 06NQ22S041, 06NQ22S042, 06NQ22S051, 06NQ22S052
Fabric Filter Style / Plenum
Nominal Damper Diameter (mm) (See Note 2) / 2,000
Operating Pressure (kPa g)(See Note 3) / -4.6
Design Pressure (kPa g)(See Note 3) / As per Table 2
Max Pressure Drop Across Open Damper (kPa g)( See Note 3) / As per Contractors selected damper
Operating Temperature, °C(See Note 3) / 157
Design Temperature, °C(See Note 3) / 174
Ambient Temperature Range, C(See Note 3) / -10 to 40
Flue Gas Flow per Damper(wo/Ash), kg/hr(See Note 3) / 85,372
Flue Gas/Air density(wo/Ash), kg/m3(See Note 4) / 0.663
Corrosive or Abrasive Properties of gas stream / As per Table 6
Ash Flow per Damper, kg/hr / ---
Duct Orientation (Horizontal or Vertical) / Horizontal
Damper Shaft Orientation (Vertical) / Vertical
Inside Diameter of seal seat ring(See Note 2) - Estimate, mm / As per Contractors selected damper
Allowable Leakage guarantee (%) / As per Contractors selected damper
Draft loss (resistance) guarantee (kPa) / As per Contractors selected damper

Notes:

(2) Diameterof clearopeningavailableforgasflow.

(3) Referto Table 2 and Table 6.

(4) Densityis at normaloperatingtemperatureandpressureenteringopendamper(s).

FFP COMPARTMENT OUTLET POPPET DAMPER - DESIGN INFORMATION DATA SHEET 2 of 2
Shaft Travel, Approximate (mm) / As per Contractors selected damper
DAMPER SEAL- TYPE / Metal on Metal
MATERIALS OF CONSTRUCTION:
SEALS / Stainless Steel
EXTERNAL FRAMEWORK / STRUCTURALCOMPONENTS / ASTM A36, ASTM A572, SANS 50025, or similar CS
FRAMEWORK EXPOSED TO FLUE GAS / ASTM A36, ASTM A572, SANS 50025, orsimilar CS
BLADES / ASTM A36, ASTM A572, SANS 50025, or similar CS
-MANUFACTURE / Seat Ring Machine Ground on Table Grinder, orEquivalent.
SHAFT GUIDES / As Required For Alignment Ensuring Proper SeatEvery Time Cycled
ACTUATOR - TYPE (1) / Pneumatic
CYLINDER- TYPE / Double Acting
OPERATING AIR PRESSURE RANGE (1), kPa (g) / 414 to 828
DESIGN PRESSURE, kPa (g) / 414
SOLENOID VALVE - TYPE
-OPERATING VOLTAGE / 220 VAC, 50 Hz
-LOSS OF POWER / Fail In Place
-MANUFACTURER / As per Contractors selected damper
DAMPER SPEED CONTROL / Needle Valve at Solenoid Outlet or Equivalent Method
DAMPER OPENING SPEED, CLOSING SPEED / 10 sec TO 20 sec., Approx.
NORMAL INTERVAL BETWEEN DAMPER OPERATION / 8 Minutes up to 90 Minutes
LIMIT SWITCH- TYPE / As per Contractors design
-OPERATING VOLTAGE / 220 VAC, 50 Hz
-MANUFACTURER / As per Contractors selected damper
PHYSICAL LOCK WITH PAD LOCK ,OR EQUIVALENT, FOR SAFETY / Prevent Motion of Damper From Closed PositionUnder Full Actuator Force
AIR FILTER / As per Contractors selected damper
AIR REGULATOR / As per Contractors selected damper
A. Price for freight to port of export or other destination / By Contractor
B. Price breakdown for various dampercomponents or optional Plant and Material / Price per m and poppet damper shaft length

Notes:(1)Oilfreeairto be provided.Contractortosupplyairfilterandregulator.

4.FFP Implosion Dampers Data Sheets

IMPLOSIONPROTECTIONPOPPETDAMPER- DESIGNINFORMATIONDATASHEET1of2
Reference
Location/Description / FabricFilterPlant OutletFlue
Quantity / 4
DamperTagNumber(s) / 06NQ13S001,06NQ13S002,06NQ23S001,06NQ23S002
FabricFilter Style / Plenum
NominalDamperDiameter(mm)(2) / 2,130
OperatingPressure(kPag)(3) / SeeTable 4
DesignPressure(kPag)(3) / SeeTable 4
MaxPressureDropAcrossOpenDamper(kPag)(3) / As per Contractors selected damper
OperatingTemperature,C(3) / SeeTable 4
DesignTemperature,C(3) / SeeTable 4
AmbientTemperatureRange,C(3) / -10to 40
AirFlowperDamper,kg/hr(3) / 360,180
Airdensity,kg/m3(4) / 1.14to1.34
CorrosiveorAbrasivePropertiesof gasstream / See Table 7
DuctOrientation(HorizontalorVertical) / Horizontal
DamperShaftOrientation(Vertical) / Vertical
DamperOpeningDirection / Upward,awayfromflue
InsideDiameterof sealseatring(2) -Estimate,mm / As per Contractors selected damper
(RefertoSketches)
AllowableLeakageguarantee(%) / As per Contractors selected damper
Draftloss(resistance)(5)guarantee(kPa) / As per Contractors selected damper

Notes:

(2) Diameter of clear opening available for gas flow.

(3) Refer to Table 7and Table 4.

(4) Density is at normal operating temperature and pressure entering open damper(s).

IMPLOSIONPROTECTIONPOPPETDAMPER-DESIGNINFORMATIONDATASHEET2of2
ShaftTravel,Approximate(mm) / As per Contractors selected damper
DAMPERSEAL- TYPE / MetalonMetal
MATERIALSOFCONSTRUCTION:
SEALS / StainlessSteel
EXTERNALFRAMEWORK/STRUCTURAL COMPONENTS / ASTM A36,ASTM A572,SANS50025,orsimilar CS
FRAMEWORKEXPOSEDTOFLUEGAS / ASTM A36,ASTM A572,SANS50025, orsimilarCS
BLADES / ASTM A36,ASTM A572,SANS50025, orsimilarCS
-MANUFACTURE / SeatRingMachineGroundonTableGrinder,orEquivalent.
SHAFTGUIDES / AsRequiredFor AlignmentEnsuringProperSeatEveryTimeCycled
ACTUATOR -TYPE(1) / Pneumatic
CYLINDER- TYPE / DoubleActing
OPERATINGAIR PRESSURERANGE(1),kPa(g) / 414to828
DESIGNPRESSURE,kPa(g) / 414
SOLENOIDVALVE-TYPE
- OPERATINGVOLTAGE / 220 VAC,50Hz
-LOSSOF POWER / FailIn Place
-MANUFACTURER / As per Contractors selected damper
DAMPERSPEEDCONTROL / NeedleValveat SolenoidOutlet orEquivalentMethod
DAMPEROPENINGSPEED,CLOSINGSPEED / 10secTO20sec.,Approx.
NORMALINTERVALBETWEEN
DAMPEROPERATION / 8Minutesup
to90 Minutes
LIMITSWITCH- TYPE / As per Contractors selected damper
- OPERATINGVOLTAGE / 220 VAC,50Hz
-MANUFACTURER / As per Contractors selected damper
PHYSICALLOCKWITHPADLOCK,
OR EQUIVALENT,FORSAFETY / PreventMotionof DamperFromClosedPositionUnderFullActuatorForce
AIRFILTER / As per Contractors selected damper
AIRREGULATOR / As per Contractors selected damper
A. Priceforfreighttoportof exportorother
destination / Include
B. Pricebreakdownforvariousdamper
componentsoroptionalequipment / Pricepermandpoppetdampershaftlength

Notes:

(1) Oil free air to be provided. Contractor to supply air filter and regulator.

5.Compartment Outlet Damper Data Pages to be completed by the Contractor

FFP COMPARTMENT OUTLET – POPPET DAMPER DATA SHEET 1 of 1
DATE:
Contractor’sReference No.
Employer’sReference No.
DAMPER AKZ NUMBER(S)
MANUFACTURER:
1. / DAMPER LOCATION
2. / SIZE
3. / QUANTITY
4. / TYPE - POPPET
5. / SERVICE (SHUTOFF - INLET/OUTLET)
6. / SHAFT ORIENTATION / VERTICAL
7. / PRESSURE / kPa
8. / TEMPERATURE / °C
9. / FRAME SIZE/MATERIAL
10. / BLADE DIAMETER
11. / BLADE TYPE (ONE PIECE, TWO PIECE, ETC.)
12. / BLADE THICKNESS/MATERIAL / mm
13. / BLADE DOUBLER THICKNESS/MATERIAL
14. / SHAFT MATERIAL/SIZE/EXTENSION
15. / PACKING GLAND TYPE/LOCATION
16. / SEAL MATERIAL
17. / BEARINGS / BUSHINGS (IN GAS, OUTSIDE GAS, LUBRICATION, ETC.)
18. / NUMBER OF SHIPPING PIECES PER DAMPER
19. / FINISH
20. / DAMPER OPENING TIME AND CLOSING TIME
21. / FOR PNEUMATIC ACTUATOR – SPECIFY AIR QUANTITY REQUIRED TO OPEN/CLOSE DAMPER / CM
22. / PRESSURE DROP ACROSS FULLY OPEN DAMPER AT OPERATING CONDITIONS / kPa
23. / SEAL AIR SYSTEM (REQUIRED)
A. / SEAL AIR FLOW / CM
B. / SEAL AIR PRESSURE / kPa
C. / SEAL AIR FAN MAKE/MODEL
D. / SEAL AIR FAN HORSEPOWER / kw
24. / GUARANTEED LEAKAGE RATE AT OPERATING CONDITIONS:
A. / WITH SEAL AIR FAN / CM
B. / WITHOUT SEAL AIR FAN / CM
25. / DRIVE SYSTEM:
A. / ACTUATOR MAKE
B. / DRIVE OUTPUT (STALL FORCE) / kg
C. / MINIMUM REQUIRED FORCE / kg
D. / MINIMUM FORCE REQUIRED TO MOVE BLADE UNDER THE DESIGN CONDITIONS / kg
E. / DRIVE TYPE
F. / LOCK SYSTEM TYPE / DETAILS OF CONSTRUCTION
26. / ESTIMATEDWEIGHTOFTHE DAMPER ASSEMBLYINCLUDING ALL ACCESSORYEQUIPMENT / kg
27. / NETPRICE/EACH

6.Implosion Protection Damper Data Pages to be completed by the Contractor

FFP IMPLOSION – POPPET DAMPER DATA SHEET 1 of 1
DATE:
Contractor’sReference No.
Employer’sReference No.
DAMPER AKZ NUMBER(S)
MANUFACTURER:
1. / DAMPER LOCATION
2. / SIZE
3. / QUANTITY
4. / TYPE - POPPET
5. / SERVICE (SHUTOFF - INLET/OUTLET)
6. / SHAFT ORIENTATION / VERTICAL
7. / PRESSURE / kPa
8. / TEMPERATURE / °C
9. / FRAME SIZE/MATERIAL
10. / BLADE DIAMETER
11. / BLADE TYPE (ONE PIECE, TWO PIECE, ETC.)
12. / BLADE THICKNESS/MATERIAL / mm
13. / BLADE DOUBLER THICKNESS/MATERIAL
14. / SHAFT MATERIAL/SIZE/EXTENSION
15. / PACKING GLAND TYPE/LOCATION
16. / SEAL MATERIAL
17. / BEARINGS / BUSHINGS (IN GAS, OUTSIDE GAS, LUBRICATION, ETC.)
18. / NUMBER OF SHIPPING PIECES PER DAMPER
19. / FINISH
20. / DAMPER OPENING TIME AND CLOSING TIME
21. / FOR PNEUMATIC ACTUATOR – SPECIFY AIR QUANTITY REQUIRED TO OPEN/CLOSE DAMPER / CM
22. / PRESSURE DROP ACROSS FULLY OPEN DAMPER AT OPERATING CONDITIONS / kPa
23. / SEAL AIR SYSTEM (IF REQUIRED)
A. / SEAL AIR FLOW / CM
B. / SEAL AIR PRESSURE / kPa
C. / SEAL AIR FAN MAKE/MODEL
D. / SEAL AIR FAN HORSEPOWER / kw
24. / GUARANTEED LEAKAGE RATE AT OPERATING CONDITIONS:
A. / WITH SEAL AIR FAN / CM
B. / WITHOUT SEAL AIR FAN / CM
25. / DRIVE SYSTEM:
A. / ACTUATOR MAKE
B. / DRIVE OUTPUT (STALL FORCE) / k
C. / MINIMUM REQUIRED FORCE / kg
D. / MINIMUM FORCE REQUIRED TO MOVE BLADE UNDER THE / kg
DESIGN CONDITIONS
E. / DRIVE TYPE
F. / LOCK SYSTEM TYPE / DETAILS OF CONSTRUCTION
26. / ESTIMATEDWEIGHTOFTHE DAMPER ASSEMBLYINCLUDING ALL ACCESSORYEQUIPMENT / kg
27. / NETPRICE/EACH

Part C3: Scope of WorkAppendix HC3.1 ECC3 Employer’s Works Information