PORTABLE STEAM CLEANING SYSTEM (MINI-MAX)

Revision Date: 12/03
Process Code: Navy/Marines: IND-002-13; Air Force: CL05; Army: CLD
Usage List: Navy - Low; Marines - Low; Army - Low; Air Force - Low
Alternative For: Solvent Cleaning
Compliance Impact: Low
Applicable EPCRA Targeted Constituents and CAS Numbers: Methyl ethyl ketone (CAS: 78-93-3), Toluene (CAS: 108-88-3),1,1,1-Trichloroethane (CAS: 71-55-6), Xylene (CAS:1330-20-7)

Overview: A portable, hand-held steam cleaning system, the Mini-Max system, is a viable alternative to replace solvent cleaning and degreasing of weapons, automotive parts, electronics, printed circuit boards, ground support equipment, and other gear. This technology uses distilled or deionized water mixed with/without a rust inhibiting solution to generate small amounts of steam at a temperature of 500 degrees Fahrenheit. The rust inhibitor solution can be purchased with a light detergent for emulsifying oils or without detergent. It is proprietary but is non-toxic, non-flammable, biodegradable and eliminates the use of solvents that are currently used in these cleaning processes. The steam is generated through a nozzle at a pressure of 150 psi - 295 psi, depending on the unit. The steam’s high temperature and low specific heat allow surfaces to be heated to relatively high temperatures. High temperature is maintained on the surface long enough for the steam to vaporize or liquefy the oil, grease, or dirt. The residue can then be effectively washed away with the steam condensate.

This equipment is available for procurement through the GSA supply system and the Navy’s P2 Equipment Procurement Program (PPEP). No installation is required (110v power only). Units are currently in use at several Navy and DoD installations, including: SUBASE Bangor; Tobyhanna Army Depot; and NAS Patuxent River. This technology has been recommended for use by the Field Activity Support and Technology Transfer (FASTT) team.


Compliance Benefit: A portable steam cleaning system will decrease the generation of waste solvent from cleaning and degreasing operations. The decrease in hazardous waste helps facilities meet the requirements of waste reduction under RCRA, 40 CFR 262, Appendix, and may also help facilities reduce their generator status and lessen their amount of regulatory burden (i.e., recordkeeping, reporting, inspections, transportation, accumulation time, emergency prevention and preparedness, emergency response) under RCRA, 40 CFR 262. In addition, since less solvent is used the possibility that a facility meets any of the reporting thresholds of SARA Title III for solvents (40 CFR 355, 370, and 372; and EO 12856) is decreased. A steam cleaning system may also decrease the likelihood of the facility requiring an air permit under 40 CFR 70 and 71 since less volatile and less toxic cleaning solutions are used. Switching from a halogenated solvent (i.e., methyl chloroform, methylene chloride, perchloroethylene, carbon tetrachloride or chloroform) may also decrease the need for a facility to meet the NESHAPs for halogenated solvent cleaning (40 CFR 63). Moreover, the steam cleaner may decrease the amount of ODSs used at a facility which will help the facility meet the requirements under 40 CFR 82, Subpart D and Executive Order 12843 requiring federal agencies to maximize the use of safe alternatives to class I and class II ozone depleting substances, to the maximum extent practicable. A steam cleaner will only slightly increase water consumption. Under EO 13123, federal facilities are required to implement water conservation projects. Some bases have also reduced their oily rag generation rates with this equipment.

The compliance benefits listed here are only meant to be used as general guidelines and are not meant to be strictly interpreted. Actual compliance benefits will vary depending on the factors involved, e.g., the amount of workload involved.


Materials Compatibility: Flash rusting may be a problem for certain types of steel. Preventative measures (such as use of the "Arma-sol" additive to the solution) may be required. Prior to implementing this technology, performing a test case is recommended to ensure that the desired finished product is achieved. Heat generated is minimal (does not affect circuit boards) but should be addressed.


Safety and Health: Gloves and safety goggles should be worn when operating this equipment. No other personal protective equipment (PPE) is required. Consult your local industrial health specialist, your local health and safety personnel, and the appropriate MSDS prior to implementing this technology.

Benefits:
  • Eliminates the use of solvents, carbon removers and bore cleaners currently used in these processes.
  • Reduces the amount of hazardous waste (rags and chemicals) and hazardous air emissions generated compared to solvent degreasing.
  • Utilizes simple equipment with low implementation cost.
  • Reduces worker exposure to toxic organic chemicals.
  • Provides solvent cost savings.
  • Reduces the labor hours and associated costs compared to current solvent-based cleaning procedures.


Disadvantages:
  • Steam cleaning is not recommended for any equipment, component, or material that is temperature or moisture sensitive; a rust prevention additive should be used when flash rusting is a concern.
  • System may pose an Electrostatic Discharge (ESD) threat when cleaning electronic components; preventative measures may be required.
  • Water can penetrate and/or damage joints, seals, and bonded areas; hand-held air blowers (compressors) may be required to remove residual moisture.

Economic Analysis: The capital cost for a mobile unit and multiple-station steam cleaning units will vary, depending upon the unit type and its application. Capital costs for these systems can range from $1,500 to $3,500.

Assumptions:

  • Mobile steam cleaning equipment cost: $3,500
  • Labor rate: $19.79/hr (Military E-5 Composite Rate)
  • Solvent procurement cost: $11/gal
  • Water usage cost (deionized water): $2.50/gal in small quantities (i.e. NSN 6810-00-356-4936)
  • Electricity: $0.08/kw-hr
  • Waste solvent disposal cost: $2/gal
  • Industrial wastewater disposal cost: $8.24/1000 gal
  • Hazardous waste disposal cost: $0.12/lb

Steam Cleaning of Weapons

  • Total labor requirements for weapons cleaning: 0.4 hr/gun x 120 guns/day x 220 days/yr
  • System electrical requirements: 350 kw-hr/yr
  • Water usage: Approx. $0.25/weapon (with rust inhibitor) x 120 weapons x 220 days/yr (Note* $0.05/weapon without inhibitor)  

Solvent Cleaning of Weapons

  • Total labor requirements for equipment cleaning: 1.25 hr/gun x 120 guns/day x 220 days/yr
  • Solvent usage: 5 gal/week or 260 gal/yr
  • Waste solvent: 50 gal./yr
  • Materials usage: 352 boxes (rags)  

Annual Operating Cost Comparison for Portable Steam Cleaner vs. Solvent Cleaning

 

Portable Steam Cleaning

Solvent Cleaning

Operational Costs:    
Labor: $208,824 $652,080
Materials: $  1,600 $  7,920
Process Water: $  6,600
(with inhibitor)
$0
Energy: $     30 $0
Waste Solvent/Material Disposal: $0 $    607
Wastewater Treatment: $0 $0
Total Operational Costs: $217,024 $660,607
Total Recovered Income: $0 $0
Net Annual Cost/Benefit: -$217,024 -$660,607

Economic Analysis Summary

  • Annual Savings for Portable Steam Cleaning: $443,583
  • Capital Cost for Diversion Equipment/Process: $8,324
  • Payback Period for Investment in Equipment/Process: < 1 year

  • Click Here to view an Active Spreadsheet for this Economic Analysis and Enter Your Own Values. To return from the Active Spreadsheet, click the Back arrow on the Tool Bar.



    NSN/MSDS:

    Product

    NSN Unit  Size Cost MSDS*
    Cleaner, steam, pressure, jet (min-max cleaner only, 190 psi) 4940-01-411-8632 ea. $1,254.50  
    Cleaner, steam, pressure, jet (min-mas work station) 4940-01-409-0148 ea. $5,561.60  
    Cleaner, steam, pressure, jet (Min-Max cleaner Mod II-High output 295 psi) Not identified ea. > $3,000  

    *There are multiple MSDSs for most NSNs. The MSDS (if shown above) is only meant to serve as an example. To return from the MSDS, click the Back arrow on the Tool Bar.



    Approving Authority: Appropriate authority for making process changes should always be sought and obtained prior to procuring or implementing any of the technologies identified herein.


    Points of Contact: For more information

    Vendors: PDQ Precision, Inc.
    P.O. Box 99838
    San Diego, CA 92169
    Phone: (858) 581-6370
    FAX: (858) 474-1300
    Service: Mini-Max Cleaner
    GSA# GS-07F-5805A
    URL:  http://www.minimaxcleaner.com/


    Related Links:

    Do You Perform Parts Cleaning, Degreasing Or Surface Cleaning? -- Navy Environmental Quality Initiative (EQI)


    Sources: Mr. Robert Vozella, FASTT Leader, November 1999.
    Mr. Charles Tittle, FASTT Director, Code SEA 00TB, (703) 602-3594


    Supplemental: Picture of Mini-Max Portable Steam Cleaning
    Picture of Mini-Max Portable Steam Cleaning