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SPECIFICATION
INGESTIVE CLEANING SOLAR TURBINE ENGINES
SPECIFICATION NO. ES 9-62 ISSUED: 04-10-02
(Date and PRD No.)
REVISION:
(Letter, Date and PRD No.)
A; 10/10/78; EL 2336-1
B; 6/7/82; ERL 5459-1
C; 11/8/85; ERL 8100-3
D; 3/28/88; ERL 9707-1
E; 5/11/89; ERL 9348-5
F; 2/2/90; ERL 0164-1
G; 5/29/92; ERL 10236-1
H; 11/29/94; ERL 11248-1
J; 7/8/98; PRD13562-1
K; 04-10-02; PRD14714-1
Rev. Ltr/ PRD # Signature & Title Date Pages Affected
Prepared By:
Boe Lotton
06-20-02 Page 4
L
CR 01511
Approved By:
Gene Gerow
06-20-02
ATTENTION
This document contains data pertaining to proprietary designs of Solar Turbines Incorporated.
Reproduction, manufacture or use of any assembly, subassembly, or part indicated herein or
the use of the design of any such assembly, subassembly, or part is permissible only if
expressly authorized in advance and in writing by Vice President of Engineering, Solar Turbines
Incorporated.

2. Specification No. ES 9-62
ii
CONTENTS
Paragraph Page
1.0 SCOPE 1
1.1 Purpose 1
1.2 Cleaning Procedures 1
1.3 Cleaning Solutions 1
2.0 DEFINITIONS 1
3.0 APPLICABLE DOCUMENTS 2
3.1 Specifications 2
4.0 GENERAL REQUIREMENTS 2
4.1 On-Crank Vs. On-Line Cleaning 2
4.2 Intervals Between Engine Cleaning 2
4.3 Cleaning Procedures 3
4.4 Cleaning Equipment 4
4.5 Ambient Temperature During Engine Cleaning 4
4.6 Engine Temperature During Engine Cleaning
4.7 Recuperated Cycle Applications 4
4.8 Flow Requirements 5
5.0 CLEANING PRODUCT 6
5.1 Water 6
5.2 Cleaning Product Composition [& Mix Ratios] 6
5.3 Emulsified Kerosene/Water Solutions 8
5.4 Abrasive Cleaners 8
TABLES
Table Page
1 On-Crank Requirements for Water/Freeze Point Depressant Mix, Volume Ratio 4
InCold Ambient Temperatures
2 On-Crank Cleaning Solution and Rinse Water Flow Requirements 5
3 On-Line Cleaning Solution and Rinse Water Flow Requirements 5
4 Requirements for Water Used in Ingestive Cleaning of Solar Engines 6
5 Requirements for Cleaning Product Used in Ingestive Cleaning of Solar Engines 7
6 Solar Cleaning Solutions for On-Line and On-Crank Cleaning 7

3. Specification No. ES 9-62
1
1.0 SCOPE
1.1 PURPOSE - This specification establishes technical requirements for removing
contamination in the compressor air path of Solar turbine engines by ingestive cleaning.
1.2 CLEANING PROCEDURES - The requirements defined herein serve as a basis for
establishing proper cleaning procedures such that surface contamination in the compressor air
path can be removed without damage to the engine. Details of the cleaning methods, cleaning
instructions and suitable equipment for each engine model are not a part of this document as
they are provided in the Operation and Maintenance Instruction (OMI) manual and in Solar's
Service Bulletins.
1.3 CLEANING PRODUCTS - This specification provides the standards for product
acceptance to ensure that the cleaning product(s) used are not harmful to the materials of
construction.
2.0 DEFINITIONS
2.1 FREEZE POINT DEPRESSANT– Material used to depress the freezing point of the
cleaning product.
2.2 CLEANING EQUIPMENT - Accessory equipment used to properly introduce a cleaning
product (not solid cleaners) into the air inlet.
2.3 CLEANING MODE - The mode of operation of the engine (on-crank or on-line) while
cleaning is performed.
2.4 CLEANING PRODUCT – A chemical solution that is introduced into the air inlet for the
purpose of ingestive cleaning of the engine.
2.5 CLEANING SOLUTION – A detergent and/or solvent material that is mixed with water to
produce the cleaning product.
2.6 CLEANING SYSTEM - An appropriate combination of cleaning product, cleaning
procedure and cleaning equipment to be used for a particular engine model.
2.7 DETERGENT – Cleaning solution that liberates contamination by surface interaction
(surfactant).
2.8 INGESTIVE CLEANING - Engine compressor cleaning where cleaning product is
introduced through the air inlet.
2.9 ON-CRANK - Engine operation at maximum speed obtainable on starter alone with fuel
and ignition deactivated.
2.10 ON-LINE - Engine fired and operating at any power level ranging from idle (no load) to
full rated power and load.
2.11 SOLVENT – Cleaning solution that dissolves contamination through reaction at
molecular bonds.

4. Specification No. ES 9-62
2
3.0 APPLICABLE DOCUMENTS
3.1 SPECIFICATIONS - The following documents of the latest issue in effect on the release
date of this specification form a part of this specification to the extent specified herein.
Solar
ES 9-98 Fuel, Air and Water (or Steam) for Solar Gas Turbine Engines
Military
MIL-D-16791 Detergents, General Purpose (Liquid, Nonionaic)
MIL-F-16884 Fuel Oil, Diesel, Marine
MIL-E-9500 Ethylene Glycol, Technical
American Society for Testing Materials
ASTM D482 Standard Test Method for Ash from Petroleum Products
ASTM D512 Chloride Ion in Water and Waste Water, Test for
ASTM D770 Standard Specification for Isopropyl Alcohol
ASTM D857 Standard Test Methods for Aluminum in Water
ASTM D858 Standard Test Methods for Manganese in Water
ASTM D1068 Standard Test Methods for Iron in Water
ASTM D1293 pH of Water, Test for
ASTM D1428 Sodium and Potassium in Water and Water-Formed Deposits by
Flame Photometry, Tests for
ASTM D1688 Standard Test Methods for Copper in Water
ASTM D1888 Particulate and Dissolved Matter, Solids, or Residue in Water
ASTM D2699 Standard Specification for Kerosene
4.0 GENERAL REQUIREMENTS
4.1 ON-CRANK VERSUS ON-LINE CLEANING - In general, on-crank cleaning tends to be
more effective to remove deposits in the compressor air path. On-line cleaning may be
performed in between on-crank cleaning cycles to extend time between on-crank cleaning and
to minimize further deposition on to cleaned airfoils. Because the engine is firing during on-line
cleaning, the cleaning liquid (either water or cleaning solution) ingested must meet the more
stringent requirements defined in this specification to minimize introduction of corrosive/fouling
contaminants.
4.2 INTERVALS BETWEEN ENGINE CLEANING – Appropriate intervals for both on-crank
and on-line cleaning should be determined by recording and trending engine performance

5. Specification No. ES 9-62
3
degradation. Cost of the maintenance outage versus that of continued operation with
compromised performance. must also be considered. However, one should not delay cleaning
so long that contamination becomes impossible to remove completely by on-crank cleaning. On-
crank cleaning is recommended at maximum intervals of every 4,000 hours operation, and
before full load power degrades more than 5%. For two shaft turbines operating at full load on
T5 topping this typically corresponds to a 2.5% drop in Pcd. For two shaft turbines operating at
full load on Ngp topping, degree of compressor fouling is more difficult to quantify. As the
compressor fouls, T5 will increase with little change in power or Pcd until T5 topping is
achieved.
On-line cleaning intervals should be determined by observing the effectiveness in restoring
performance. On-line cleaning is best suited to remove the initial buildup of contamination from
already clean airfoils. If the airfoils become significantly fouled between on-line cleaning
intervals, cleaning will be less effective. Initial on-line cleaning interval should be at most 48
hours of operation. Performance should then be evaluated to determine effect of each cleaning
operation, and overall rate of performance degradation. After completing an on-crank cleaning,
on-line cleaning interval can be increased to 72 hours of operation. If no significant difference in
on-line cleaning effectivenes is observed, the interval may be increased again by 24 hours.
Typically, the maximum interval for an effective on-line cleaning program is no more than 96
hours of operation.
Recommended minimum intervals between cleaning operations to avoid excessive ingress of
cleaning product into the oil system are:
On-Crank Cleaning - at least 96 operating hours between each on-crank cleaning cycle
On-Line Cleaning - at least 24 operating hours between each on-line cleaning cycle
4.3 CLEANING PROCEDURES - Detailed cleaning procedures are described in the
Operation and Maintenance Instruction (OMI) manual provided with each package. An outline
of typical procedures are provided here:
On-Crank:
• Shut down turbine normally
• Cool until turbine case temperature at compressor to diffuser flange is less than 66C
(150F)
• Open air inlet access covers
• Open air inlet drain port
• Disconnect and isolate Pcd, buffer air and air sensing lines at connection points to
compressor or diffuser
• Disconnect combustor, torch and exhaust drain lines
• Prepare cleaning product and cleaning equipment
• Crank turbine on the starter motor and allow speed to stabilize
• Apply cleaning product
• Stop turbine and allow cleaning product to soak for a period of 20 minutes
• Crank turbine on the starter motor and allow speed to stabilize
• Apply rinse water
• Verify that rinse water exiting from drains is clean, indicating that compressor cleaning
was effective and repeat cleaning operation as necessary
• Continue crank for 5-10 minutes after rinse water is consumed
• Stop turbine
• Inspect inlet housing and compressor inlet to verify cleanliness
• Reassemble and reconnect all components and lines
• Restart turbine and operate for at least one hour to evaporate remaining rinse water

6. Specification No. ES 9-62
4
On-Line:
• Verify that unit is operating normally with steady load and speed
• Prepare cleaning product and cleaning equipment
• Apply cleaning product
• Apply rinse water
• Isolate cleaning equipment
4.4 CLEANING EQUIPMENT - Use of cleaning equipment designed specifically for each
turbine model is important to ensure that adequate and uniform atomization occurs at the
compressor inlet. This is particularly important for on-line cleaning to avoid overloading of
airfoils that can result from non-uniform distribution or excessively large liquid droplets. Use of
inappropriate equipment may result in compressor damage.
Cleaning product is introduced to the turbine inlet through manifolds and nozzles mounted
directly to the turbine inlet duct, with separate systems for either on-crank or on-line cleaning.
Cleaning product can also be introduced manually using a hand held sprayer wand, but only for
on-crank cleaning procedure. With either application method, cleaning product volume and flow
rates must comply with the requirements defined in Section 4.8 of this specification.
4.5 AMBIENT TEMPERATURE DURING ENGINE CLEANING – On-line engine cleaning is
permitted only at ambient temperatures above 4°C (39°F).
On-crank engine cleaning is permitted only at ambient temperatures above -20°C (-4°F). When
the ambient temperature is between -20°C (-4°F) and 4°C (39°F), a mixture of water and freeze
point depressant must be used for on-crank cleaning. The ratio of the water/freeze point
depressant mix depends upon the type of freeze point depressant used, and recommended
ratios are listed in Table 1. In order to be effective, the solution must be well mixed immediately
prior to use.
Table 1. On-Crank Requirements for Water/Freeze Point Depressant
Mix Volume Ratio in Cold Ambient Temperatures
Ambient Temperature
Freeze Point
Depressant
Volume Ratio
Freeze Point Depressant :
Water
-20°C(-4°F) to 4°C(39°F) Methanol 2 : 3
-20°C(-4°F) to 4°C(39°F) Mono-ethylene Glycol 2 : 3
-10°C(14°F) to 4°C(39°F) Isopropyl Alcohol 1 : 1
4.6 ENGINE TEMPERATURE DURING ENGINE CLEANING - Prior to on-crank cleaning,
the engine casing surface temperature, measured at the compressor to diffuser flange shall not
exceed 65°C (150°F).
4.7 RECUPERATED CYCLE APPLICATIONS - Water and/or cleaning solutions are not
permitted in recuperators except for Harrison and GEA models. For all other recuperator
models, on-crank cleaning must be performed at a reduced crank speed of 800 - 900rpm to
avoid depositing cleaning refuse in the recuperator. On-line cleaning is not permitted for any
recuperated units.

7. Specification No. ES 9-62
5
4.8 FLOW REQUIREMENTS - Tables 2 and 3 list the total volume of fluid and flow rate
required for on-crank and on-line cleaning for each model turbine.
Table 2. On-Crank Cleaning Solution and Rinse Water Flow Requirements
Product
Family
On-Crank Cleaning
Product Volume
On-Crank Rinse
Water Volume
On-Crank Flow Rate
[FOR CLEANING OR RINSE]
Titan 130
75.7 – 94.6 liters
(20-25 Gallons)
94.6 – 189.3 liters
(25-50 Gallons)
17 to 20.8 liter/min
(4.5 to 5.5 gpm)
Mars
90/100
56.8 – 75.7 liters
(15-20 Gallons)
75.7 – 151.4 liters
(20-40 Gallons)
11.4 to 15.1 liter/min
(4 to 5 gpm)
Taurus
70
56.8 – 75.7 liters
(15-20 Gallons)
75.7 – 151.4 liters
(20-40 Gallons)
7.5 to 11.3 liter/min
(4 to 5 gpm)
Taurus
60
45.4 – 64.3 liters
(12-17 Gallons)
64.4 – 128.7 liters
(17-34 Gallons)
9.1 to 12.9 liter/min
(2.4 to 3.4 gpm)
Centaur
40/50
45.4 – 64.3 liters
(12-17 Gallons)
64.4 – 128.7 liters
(17-34 Gallons)
9.1 to 12.9 liter/min
(2.4 to 3.4 gpm)
Saturn
10/20
30.3 – 37.9 liters
(8-10 Gallons)
37.9 – 75.7 liters
(10-20 Gallons)
5.7 to 9.5 liter/min
(1.5 to 2.5 gpm)
Mercury
50
56.8 – 75.7 liters
(15-20 Gallons)
75.7 – 94.6 liters
(20-25 Gallons)
6.8 to 7.6 liter/min
(1.8 to 2.0 gpm)
Table 3. On-Line Cleaning Solution and Rinse Water Flow Requirements
Product
Family
On-Line
Cleaning Product
Volume
On-Line
Rinse Water
Volume
On-Line Flow Rate
[FOR CLEANING OR
RINSE]
Titan 130
75.7 – 94.6 liters
(20-25 Gallons)
94.6 – 189.3 liters
(25-50 Gallons)
11.4 to 13.6 liter/min
(3 to 3.6 gpm)
Mars 90/100
56.8 – 75.7 liters
(15-20 Gallons)
75.7 – 151.4 liters
(20-40 Gallons)
8.3 to 10.6 liter/min
(2.2 to 2.8 gpm)
Taurus 70
56.8 – 75.7 liters
(15-20 Gallons)
75.7 – 151.4 liters
(20-40 Gallons)
5.3 to 7.6 liter/min
(1.4 to 2 gpm)
Taurus 60
45.4 – 64.3 liters
(12-17 Gallons)
64.4 – 128.7 liters
(17-34 Gallons)
2.3 to 4.5 liter/min
(0.6 to 1.2 gpm)
Centaur
40/50
45.4 – 64.3 liters
(12-17 Gallons)
64.4 – 128.7 liters
(17-34 Gallons)
2.3 to 4.5 liter/min
(0.6 to 1.2 gpm)
Saturn
10/20
30.3 – 37.9 liters
(8-10 Gallons)
37.9 – 75.7 liters
(10-20 Gallons)
1.5 to 3.8 liter/min
(0.4 to 1 gpm)
Mercury 50 N/A N/A N/A

8. Specification No. ES 9-62
6
5.0 CLEANING PRODUCT
5.1 WATER - Water to be used for ingestive cleaning (or rinsing) of any Solar turbine engine
shall comply with the requirements set forth in Table 4.
Table 4. Requirements for Water Used in Ingestive Cleaning of Solar Engines
Test Method
Max. Limits for
On-Crank
Cleaning
Max. Limits
for On-Line
Cleaning
Sodium + Potassium ASTM D1428 105 ppmw 1.9 ppmw
Fluorine 100 ppmw 1.9 ppmw
Chlorine ASTM D512 100 ppmw 40 ppmw
Lead ASTM D3559 2 ppmw 0.70 ppmw
Vanadium ASTM D3373 2 ppmw 0.35 ppmw
Iron, Tin, Silicon, Aluminum,
Copper, Manganese,
Phosphorus
ASTM D857, D858,
D1068, D1688
10 ppmw 3.8 ppmw
Calcium + Magnesium ASTM D3605, D511 100 ppmw 3.8 ppmw
Total Dissolved Solids ASTM D1888 350 ppmw 5 ppmw
PH ASTM D 1293 6 - 9 6 - 9
5.2 CLEANING PRODUCT COMPOSITION AND PHYSICAL PROPERTIES – Composition
and physical properties of cleaning products must comply with the limits defined in Table 5.
Failure to comply with these limits can cause corrosive attack and/or other harmful effects
resulting in rapid engine deterioration. When the cleaning product consists of a mixture of
cleaning solution concentrate and water, the limits in Table 5 apply to the resulting cleaning
product.
Solar offers various cleaning solutions that that when properly mixed as a cleaning product,
comply with both on-crank and on-line requirements of Table 5. These are available through the
Solar Service Parts support network and part numbers are listed in Table 6. Three different
types of cleaning solutions are available, each in either concentrate or ready mixed solutions:
5.2.1 Solar Gas Turbine Cleaner No. 1 – Petroleum solvent based solution is the most
effective type for cleaning oil and Carbon based fouling. However, local environmental
regulations may require special treatment of the waste from on-crank cleaning. Disposal is not
typically a consideration for on-line cleaning because the cleaning product is combusted
completely in the turbine.
5.2.2 Solar Gas Turbine Cleaner No. 2 - This biodegradable type of solution is formulated with
natural solvents and detergents and is generally less effective than pretroleum based solution.
Warming solution to approximately 30°C (86°F) and allowing longer soak time can improve
effectiveness.

9. Specification No. ES 9-62
7
Table 5. Requirements for Cleaning Product Used in Ingestive Cleaning of Solar Engines
Test Method
Max. Limits for
On-Crank
Solutions
Max. Limits for
On-Line
Solutions
Sodium + Potassium ASTM D1428 105 ppmw 1.9 ppmw
Fluorine 100 ppmw 1.9 ppmw
Chlorine ASTM D512 100 ppmw 40 ppmw
Lead ASTM D3559 2 ppmw 0.70 ppmw
Vanadium ASTM D3373 2 ppmw 0.35 ppmw
Iron, Tin, Silicon, Aluminum,
Copper, Manganese,
Phosphorus
ASTM D857, D858,
D1068, D1688
10 ppmw 3.8 ppmw
Calcium + Magnesium ASTM D3605
ASTM D511
100 ppmw 3.8 ppmw
Ash ASTM D482 0.25 wt. % 0.01 wt. %
Flash Point ASTM D93 >140o
F >140o
F
PH ASTM D 1293 6 - 9 6 - 9
Table 6. Solar Cleaning Solutions for On-Line and On-Crank Cleaning
SOLAR PRODUCT NAME SOLAR P/N
Maximum Strength
Volume Ratio
(Water:Cleaning Solution)
P/N 701690C2 (6.5 gal)Solar Gas Turbine Cleaner No. 1
(Petroleum Solvent Based)
Concentrate P/N 701691C2 (55 gal)
4:1
P/N 701696C2 (6.5 gal)Solar Gas Turbine Cleaner No. 1
(Petroleum Solvent Based)
Ready-To-Use P/N 701697C2 (55 gal)
Full Strength
P/N 701688C2 (6.5 gal)Solar Gas Turbine Cleaner No. 2
(Natural Solvent Water Based)
Concentrate P/N 701689C2 (55 gal)
4:1
P/N 701694C2 (6.5 gal)Solar Gas Turbine Cleaner No. 2
(Natural Solvent Water Based)
Ready-To-Use P/N 701695C2 (55 gal)
Full Strength
P/N 1011634 (6.5 gal)Solar Gas Turbine Cleaner No. 3
(Non-Solvent Water Based)
Concentrate P/N 1011635 (55 gal)
4:1
P/N 1011636 (6.5 gal)Solar Gas Turbine Cleaner No. 3
(Non-Solvent Water Based)
Ready-To-Use
P/N 1011637 (55 gal) Full Strength

10. Specification No. ES 9-62
8
5.2.3 Solar Gas Turbine Cleaner No. 3 – This biodegradable type of solution is formulated with
natural detergents and is generally less effective than solutions containing solvents. Warming
solution to approximately 30°C (86°F) and allowing longer soak time can improve effectiveness.
5.3 EMULSIFIED KEROSENE/WATER SOLUTIONS - An emulsified mixture of kerosene
and water or diesel fuel and water may be used for on-crank cleaning only. This mixture is
formulated by mixing diesel fuel per MIL-F-16884 and water per Table 3 with an emulsifier per
MIL-D-16791 (Type II) such that a homogenous, sprayable solution is formed. The mixing ratio
shall be according to that recommended by the emulsifier manufacturer, but limited such that
the combined diesel/kerosene and emulsifier content does not exceed 10% by volume of the
final mixture.
5.4 ABRASIVE CLEANING – Abrasive cleaners, such as Carboblast, walnut shells, pecan
shells or rice, are not recommended for use in Solar’s gas turbines. Use of abrasive cleaners
can cause plugging of cooling air passages in nozzles and blades, resulting in loss of cooling air
and thermal degradation of the component. Abrasive cleaners may also have a detrimental
effect on compressor coating.